Document:

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                                                                   EXHIBIT 10.15

                               SECURITY AGREEMENT
                               ------------------

         THIS SECURITY AGREEMENT, dated as August 15, 2001, and to become
effective in accordance with the provisions set forth below, from SRA
INTERNATIONAL, INC., a Delaware corporation (the "Company"), SYSTEMS RESEARCH
                                                  -------
AND APPLICATIONS CORPORATION, a Delaware corporation ("SRA"), SRA TECHNICAL
                                                       ---
SERVICES CENTER, INC., a Delaware corporation ("STSC"), and each other
                                                ----
Subsidiary (as defined below) that becomes a party to this Agreement in
accordance with the provisions set forth in the Loan Agreement, as such term is
defined below (together with the Company, SRA, STSC, collectively, the
"Borrowers", and individually, a "Borrower"), in favor of SUNTRUST BANK, a
 ---------                        --------
Georgia banking corporation (the "Lender"), recites and provides as follows:
                                  ------

                                    RECITALS
                                    --------

         A. Lender has entered into a Loan Agreement of even date herewith (as
amended, modified or supplemented from time to time, the "Loan Agreement") with
                                                          --------------
Borrowers.

         B. It is a condition precedent to the making of the Loans and the
issuance of Letters of Credit by Lender under the Loan Agreement that Borrowers
shall grant the security interest contemplated by this Agreement.

         NOW, THEREFORE, in consideration of the premises and in order to induce
Lender to make the Loans and to issue Letters of Credit under the Loan
Agreement, each Borrower hereby represents, warrants, covenants and agrees as
follows:

         SECTION 1. Definitions. All capitalized terms used herein without
                    -----------
definitions shall have the respective meanings provided therefor in the Loan
Agreement. The term "State", as used herein, means the Commonwealth of Virginia.
All terms defined in the Uniform Commercial Code of the State and used herein
shall have the same definitions herein as specified therein. However, if a term
is defined in Article 9 of the Uniform Commercial Code of the State differently
than in another Article of the Uniform Commercial Code of the State, the term
has the meaning specified in Article 8.9A of the Uniform Commercial Code of the
State. In addition, as used in this Agreement, the following terms shall have
the meanings assigned to them below, which meanings shall be equally applicable
to the singular and plural forms of the terms defined.

         "Accounts Receivable" means, collectively, and includes all of the
          -------------------
following, whether now owned or hereafter acquired by a Borrower: all property
included within the definitions of "accounts," "chattel paper," "documents" and
"instruments" and "payment intangibles" set forth in the UCC.

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         "Collateral" means the following properties, assets and rights of each
          ----------
Borrower, wherever located, whether now owned or hereafter acquired or arising,
and all proceeds and products thereof: all personal and fixture property of
every kind and nature including without limitation all goods (including
inventory, equipment and any accessions thereto), instruments (including
promissory notes), documents, accounts (including health-care-insurance
receivables), chattel paper (whether tangible or electronic), deposit accounts,
letter-of-credit rights (whether or not the letter of credit is evidenced by a
writing), commercial tort claims, securities and all other investment property,
supposing obligations, any other contract rights or rights to the payment of
money, insurance claims and proceeds, tort claims, and all general intangibles
(including all payment intangibles and Intellectual Property).

         "UCC" means the Uniform Commercial Code as adopted in the State, and
          ---
all amendments thereto.

         SECTION 2. Grant of Security. Each Borrower hereby assigns and pledges
                    -----------------
to Lender, and hereby grants to Lender a security interest in all of such
Borrower's right, title and interest in and to the Collateral, whether now owned
or hereafter acquired by such Borrower, including all proceeds of any and all of
the foregoing or hereinafter-described Collateral (including, without
limitation, proceeds that constitute property of the types described herein)
and, to the extent not otherwise included, all policies of insurance on any
property of such Borrower and all payments and proceeds under any such insurance
(whether or not Lender is the loss payee thereof), or any indemnity, warranty or
guaranty payable by reason of loss or damage to or otherwise with respect to any
of the foregoing Collateral; all cash; all books of account and records,
including all computer software relating thereto; provided that the foregoing
assignment, pledge and grant shall not attach to the Collateral unless and until
a Security Event shall occur under the Loan Agreement.

         SECTION 3. Security for Obligations. This Agreement secures the payment
                    ------------------------
of all Obligations of each Borrower now or hereafter existing or arising.
Without limiting the generality of the foregoing, this Agreement secures the
payment of all amounts that constitute part of the Obligations and would be owed
by each Borrower to Lender under the Loan Agreement and the Notes but for the
fact that they are unenforceable or not allowable due to the existence of a
bankruptcy, reorganization or similar proceeding involving such Borrower.

         SECTION 4. Borrowers Remain Liable. Anything herein to the contrary
                    -----------------------
notwithstanding, (a) each Borrower shall remain liable under the contracts and
agreements included in the Collateral to the extent set forth therein to perform
all of its duties and obligations thereunder to the same extent as if this
Agreement had not been executed, (b) the exercise by Lender of any of the rights
hereunder shall not release any of Borrowers from any of their respective duties
or obligations under the contracts and agreements included in the Collateral,
and (c) Lender shall not have any obligation or liability under the contracts
and agreements included in the Collateral by reason of this Agreement, nor shall
Lender be obligated to perform

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any of the obligations or duties of any of Borrowers thereunder or to take any
action to collect or enforce any claim for payment assigned hereunder.

         SECTION 5. Representations and Warranties. Each Borrower represents
                    ------------------------------
and warrants as follows:

                  (a) All items of equipment and inventory of Borrower are
located at the places specified in Schedule 1 hereto. During the five years
                                   ----------
immediately preceding the date of this Agreement, neither Borrower nor any
predecessor of Borrower has used any corporate or fictitious name other than its
current corporate name. Borrower has no trade names. The chief executive office
and mailing address of each Borrower is 4300 Fair Lakes Court, Fairfax, Virginia
22033. Each Borrower's exact legal name is that indicated on the signature pages
hereof. Each Borrower is an organization of the type, and is organized in the
jurisdiction set forth herein. The signature pages hereof accurately set forth
each Borrower's organizational identification number or accurately states that
it has none.

                  (b) Borrower is the legal and beneficial owner of the
Collateral free and clear of any lien, security interest, option or other charge
or encumbrance except for the security interest created by this Agreement or
liens or other encumbrances permitted by the Loan Agreement. No effective
financing statement or other document similar in effect covering all or any part
of the Collateral is on file in any recording office, except such as may have
been filed in favor of Lender relating to this Agreement or otherwise permitted
by the Loan Agreement.

                  (c) Borrower has exclusive possession and control of the
Collateral.

                  (d) This Agreement creates a valid security interest in the
Collateral, securing the payment of the Obligations and, when properly
perfected, shall constitute a valid perfected security interest in such
Collateral, free and clear of all Liens except as permitted by the Loan
Agreement.

                  (e) No consent of any other person or entity and no
authorization, approval or other action by, and no notice to or filing with, any
governmental authority or regulatory body, other than the filing of UCC-1
financing statements in the applicable filing offices and such documentation as
is required to comply with the Assignment of Claims Act, is required (1) for the
grant by Borrower of the security interest granted hereby or for the execution,
delivery or performance of this Agreement by Borrower, or (2) for the exercise
by Lender of its rights and remedies hereunder. No consent of any other person
or entity and no authorization or approval by any governmental authority or
regulatory body is required for the perfection or maintenance of the security
interest created hereby (including the first priority nature of such security
interest).

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                  (f) The inventory of each Borrower has been produced by
Borrower in compliance with all requirements of the Fair Labor Standards Act.

                  (g) Borrower represents and warrants as to each and every
Account Receivable now existing that: (1) it is a bona fide existing obligation,
valid and enforceable against the Customer, (2) it is subject to no dispute,
defense or offset except as disclosed in writing to Lender; (3) all instruments,
chattel paper and other evidences of indebtedness issued to Borrower with
respect to any Account Receivable have been delivered to Lender, and, together
with all supporting documents delivered to Lender, are genuine, complete, valid
and enforceable in accordance with their terms; (4) it is not subject to any
discount, allowance or special terms of payment except as permitted hereby or by
the Loan Agreement or as disclosed in writing to Lender; and (5) it is not and
shall not be subject to any prohibition or limitation upon assignment. Borrower
covenants and agrees that each Account Receivable arising after the date of this
Agreement will be in conformance with the foregoing representations.

         SECTION 6. Further Assurances. Each Borrower agrees as follows:
                    ------------------

                  (a) Each Borrower hereby irrevocably authorizes the Lender at
any time and from time to time to file in any Uniform Commercial Code
jurisdiction any initial financing statements and amendments thereto that (1)
indicate the Collateral (i) as all assets of Borrower or words of similar
effect, regardless of whether any particular asset comprised in the Collateral
falls within the scope of Article 9A of the Uniform Commercial Code of the State
or such jurisdiction, or (ii) as being of an equal or lesser scope or with
greater detail, and (2) contain any other information required by part 5 of
Article 9A of the Uniform Commercial Code of the State for the sufficiency or
filing office acceptance of any financing statement or amendment, including (i)
whether Borrower is an organization, the type of organization and any
organization identification number issued to Borrower and, (ii) in the case of a
financing statement filed as a fixture filing or indicating Collateral as
as-extracted collateral or timber to be cut, a sufficient description of real
property to which the Collateral relates. Each Borrower agrees to furnish any
such information to the Lender promptly upon request. Each Borrower also
ratifies its authorization for the Lender to have filed in any Uniform
Commercial Code jurisdiction any like initial financing statements or amendments
thereto if filed prior to the date hereof.

                  (b) Borrower will furnish to Lender from time to time
statements and schedules further identifying and describing the Collateral and
such other information and reports in connection with the Collateral as Lender
reasonably may request, all in form and substance satisfactory to Lender.

                  (c) Without providing at least 30 days prior written notice to
Lender, Borrower will not change its name, its type of organization,
jurisdiction of organization or other legal structure, its place of business or,
if more than one, chief executive office, or its mailing address or
organizational identification number if it has one. If Borrower does not have an

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organizational identification number and later obtains one, Borrower shall
forthwith notify Lender of such organizational identification number.

         SECTION 7. Other Actions. Further to insure the attachment, perfection
                    -------------
and first priority of, and the ability of Lender to enforce, Lender's security
interest in the Collateral, each Borrower agrees, in each case at Borrower's own
expense, to take the following actions with respect to the following Collateral:

                  (a) If Borrower shall at any time hold or acquire any
promissory notes or tangible chattel paper, Borrower shall forthwith endorse,
assign and deliver the same to Lender, accompanied by such instruments of
transfer or assignment duly executed in blank as Lender may from time to time
specify.

                  (b) For each deposit account that Borrower at any time opens
or maintains, Borrower shall, at Lender's request and option, pursuant to an
agreement in form and substance satisfactory to Lender, either (1) cause the
depositary bank to agree to comply at any time with instructions from Lender to
such depositary bank directing the disposition of funds from time to time
credited to such deposit account, without further consent of Borrower, or (2)
arrange for Lender to become the customer of the depositary bank with respect to
the deposit account, with Borrower being permitted, only with the consent of
Lender, to exercise rights to withdraw funds from such deposit account. Lender
agrees with Borrower that Lender shall not give any such instructions or
withhold any withdrawal rights from Borrower, unless an Event of Default has
occurred and is continuing, or, after giving effect to any withdrawal not
otherwise permitted by the Loan Documents, would occur. The provisions of this
paragraph shall not apply to (i) any deposit account for which Borrower, the
depositary bank and Lender have entered into a cash collateral agreement
specially negotiated among Borrower, the depositary bank and Lender for the
specific purpose set forth therein, (ii) deposit accounts for which Lender is
the depositary and (iii) deposit accounts specially and exclusively used for
payroll, payroll taxes and other employee wage and benefit payments to or for
the benefit of Borrower's salaried employees.

                  (c) If Borrower shall at any time hold or acquire any
certificated securities, Borrower shall forthwith endorse, assign and deliver
the same to Lender, accompanied by such instruments of transfer or assignment
duly executed in blank as Lender may from time to time specify. If any
securities now or hereafter acquired by Borrower are uncertificated and are
issued to Borrower or its nominee directly by the issuer thereof, Borrower shall
immediately notify Lender thereof and, at Lender's request and option, pursuant
to an agreement in form and substance satisfactory to Lender, either (1) cause
the issuer to agree to comply with instructions from Lender as to such
securities, without further consent of Borrower or such nominee, or (2) arrange
for Lender to become the registered owner of the securities. If any securities,
whether certificated or uncertificated, or other investment property now or
hereafter acquired by Borrower are held by Borrower or its nominee through a
securities intermediary or commodity

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intermediary, Borrower shall immediately notify Lender thereof and, at Lender's
request and option, pursuant to an agreement in form and substance satisfactory
to Lender, either (i) cause such securities intermediary or (as the case may be)
commodity intermediary to agree to comply with entitlement orders or other
instructions from Lender to such securities intermediary as to such securities
or other investment property, or (as the case may be) to apply any value
distributed on account of any commodity contract as directed by Lender to such
commodity intermediary, in each case without further consent of Borrower or such
nominee, or (ii) in the case of financial assets or other investment property
held through a securities intermediary, arrange for Lender to become the
entitlement holder with respect to such investment property, with Borrower being
permitted, only with the consent of Lender, to exercise rights to withdraw or
otherwise deal with such investment property. Lender agrees with Borrower that
Lender shall not give any such entitlement orders or instructions or directions
to any such issuer, securities intermediary or commodity intermediary, and shall
not withhold its consent to the exercise of any withdrawal or dealing rights by
Borrower, unless an Event of Default has occurred and is continuing, or, after
giving effect to any such investment and withdrawal rights not otherwise
permitted by the Loan Documents, would occur. The provisions of this paragraph
shall not apply to any financial assets credited to a securities account for
which Lender is the securities intermediary.

                  (d) If any goods are at any time in the possession of a
bailee, Borrower shall promptly notify Lender thereof and, if requested by
Lender, shall promptly obtain an acknowledgement from the bailee, in form and
substance satisfactory to Lender, that the bailee holds such Collateral for the
benefit of Lender and shall act upon the instructions of Lender, without the
further consent of Borrower. Lender agrees with Borrower that Lender shall not
give any such instructions unless an Event of Default has occurred and is
continuing or would occur after taking into account any action by Borrower with
respect to the bailee.

                  (e) If Borrower at any time holds or acquires an interest in
any electronic chattel paper or any "transferable record," as that term is
defined in Section 201 of the federal Electronic Signatures in Global and
National Commerce Act, or in (s)l6 of the Uniform Electronic Transactions Act as
in effect in any relevant jurisdiction, Borrower shall promptly notify Lender
thereof and, at the request of Lender, shall take such action as Lender may
reasonably request to vest in Lender control, under (s)9-105 of the Uniform
Commercial Code, of such electronic chattel paper or control under Section 201
of the federal Electronic Signatures in Global and National Commerce Act or, as
the case may be, (s)16 of the Uniform Electronic Transactions Act, as so in
effect in such jurisdiction, of such transferable record. Lender agrees with
Borrower that Lender will arrange, pursuant to procedures satisfactory to Lender
and so long as such procedures will not result in Lender's loss of control, for
Borrower to make alterations to the electronic chattel paper or transferable
record permitted under UCC (s)9-105 or, as the case may be, Section 201 of the
federal Electronic Signatures in Global and National Commerce Act or (s)16 of
the Uniform Electronic Transactions Act for a party in control to make without
loss of control, unless an

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Event of Default has occurred and is continuing or would occur after taking into
account any action by Borrower with respect to such electronic chattel paper or
transferable record.

                  (f) If Borrower is at any time a beneficiary under a letter of
credit now or hereafter issued in favor of Borrower, Borrower shall promptly
notify Lender thereof and, at the request and option of Lender, Borrower shall,
pursuant to an agreement in form and substance satisfactory to Lender, either
(1) arrange for the issuer and any confirmer of such letter of credit to consent
to an assignment to Lender of the proceeds of any drawing under the letter of
credit or (2) arrange for Lender to become the transferee beneficiary of the
letter of credit, with Lender agreeing, in each case, that the proceeds of any
drawing under the letter to credit are to be applied to the payment of the
Obligations.

                  (g) If Borrower shall at any time hold or acquire a commercial
tort claim, Borrower shall immediately notify Lender in a writing signed by
Borrower of the brief details thereof and grant to Lender in such writing a
security interest therein and in the proceeds thereof, all upon the terms of
this Agreement, with such writing to be in form and substance satisfactory to
Lender.

                  (h) Borrower further agrees to take any other action
reasonably requested by Lender to insure the attachment, perfection and first
priority of, and the ability of Lender to enforce, Lender's security interest in
any and all of the Collateral including, without limitation, (1) executing,
delivering and, where appropriate, filing financing statements and amendments
relating thereto under the Uniform Commercial Code, to the extent, if any, that
Borrower's signature thereon is required therefor, (2) causing Lenders name to
be noted as Lender on any certificate of title for a titled good if such
notation is a condition to attachment, perfection or priority of, or ability of
Lender to enforce, Lender's security interest in such Collateral, (3) complying
with any provision of any statute, regulation or treaty of the United States as
to any Collateral if compliance with such provision is a condition to
attachment, perfection or priority of, or ability of Lender to enforce, Lender's
security interest in such Collateral, (4) obtaining governmental and other third
party consents and approvals, including without limitation any consent of any
licensor, lessor or other person obligated on Collateral, (5) obtaining waivers
from mortgagees and landlords in form and substance satisfactory to Lender and
(6) taking all actions required by any earlier versions of the Uniform
Commercial Code or by other law, as applicable in any relevant Uniform
Commercial Code jurisdiction, or by other law as applicable in any foreign
jurisdiction.

         SECTION 8. Covenants Concerning Collateral, Etc. Each Borrower further
                    ------------------------------------
 covenants with Lender as follows:

                  (a) The Collateral, to the extent not delivered to Lender
pursuant to this Agreement, will be kept at those locations listed on Schedule 1
                                                                      ----------
attached hereto and Borrower

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will not remove the Collateral from such locations, without providing at least
30 days prior written notice to Lender.

                  (b) Except for the security interest herein granted and Liens
permitted by the Loan Agreement, Borrower shall be the owner of or have other
rights in the Collateral free from any Lien, security interest or other
encumbrance, and Borrower shall defend the same against all claims and demands
of all persons at any time claiming the same or any interests therein adverse to
Lender.

                  (c) Borrower shall not pledge, mortgage or create, or suffer
to exist a security interest in the Collateral in favor of any person other than
Lender except for Liens permitted by the Loan Agreement.

                  (d) Borrower will keep the Collateral in good order and repair
and will not use the same in violation of law or any policy of insurance
thereon.

                  (e) As provided in the Loan Agreement, Borrower will permit
Lender, or its designee, to inspect the Collateral at any reasonable time,
wherever located.

                  (f) Borrower will pay promptly when due all taxes,
assessments, governmental charges and levies upon the Collateral or incurred in
connection with the use or operation of such Collateral or incurred in
connection with this Agreement.

                  (g) Borrower will continue to operate, its business in
compliance with all applicable provisions of the federal Fair Labor Standards
Act, as amended, and with all applicable provisions of federal, state and local
statutes and ordinances dealing with the control, shipment, storage or disposal
of hazardous materials or substances.

                  (h) Borrower will not sell or otherwise dispose, or offer to
sell or otherwise dispose, of the Collateral or any interest therein except for
(1) sales and leases of inventory and licenses of general intangibles in the
ordinary course of business and (2) so long as no Event of Default has occurred
and is continuing, sales or other dispositions of obsolescent items of equipment
in the ordinary course of business consistent with past practices, and
dispositions permitted by the Loan Agreement.

         SECTION 9. Insurance. Each Borrower agrees as follows:
                    ---------

                  (a) Borrower shall, at its own expense, maintain insurance
with respect to the Collateral in such amounts, against such risks, in such form
and with such insurers, as shall be satisfactory to Lender from time to time.
Each policy for liability insurance shall provide for all losses to be paid on
behalf of Lender and Borrower as their respective interests may appear, and each
policy for property damage insurance shall provide for all losses to be paid
directly to Lender. Each such policy shall in addition (1) name Borrower and
Lender as insured parties

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thereunder (without any representation or warranty by or obligation upon Lender)
as their interests may appear, (2) contain the agreement by the insurer that any
loss thereunder shall be payable to Lender notwithstanding any action, inaction
or breach of representation or warranty by Borrower, (3) provide that there
shall be no recourse against Lender for payment of premiums or other amounts
with respect thereto, and (4) provide that at least ten days' prior written
notice of cancellation or of lapse shall be given to Lender by the insurer.
Borrower shall, if so requested by Lender, deliver to Lender original or
duplicate policies of such insurance, together with such endorsements as may be
required by Lender, and, as often as Lender may reasonably request, a report of
a reputable insurance broker with respect to such insurance. Further, Borrower
shall, at the request of Lender, duly execute and deliver instruments of
assignment of such insurance policies to comply with the requirements of Section
6 and cause the insurers to acknowledge notice of such assignment.

                  (b) Reimbursement under any liability insurance maintained by
Borrower pursuant to this Section 9 may be paid directly to the person who shall
have incurred liability covered by such insurance. In case of any loss involving
damage to Collateral when Section 8(c) is not applicable, Borrower shall make or
cause to be made the necessary repairs to or replacements of such Collateral,
and any proceeds of insurance maintained by Borrower pursuant to this Section 9
shall be paid to Borrower as reimbursement for the costs of such repairs or
replacements.

                  (c) Upon (1) the occurrence and during the continuance of any
Event of Default, or (2) the actual or constructive total loss (in excess of
$50,000 per occurrence) of any Collateral, all insurance payments in respect of
such Equipment or Inventory shall be paid to and applied by Lender as specified
in Section 16(b).

         SECTION 10. As to Accounts Receivable and General Intangibles. Each
                     -------------------------------------------------
 Borrower agrees as follows:

                  (a) Borrower shall keep its chief place of business and chief
executive office and the office where it keeps its records concerning the
Accounts Receivable and the General Intangibles at 4300 Fair Lakes Court,
Fairfax, Virginia 22033 or, upon 45 days' prior written notice to Lender, at any
other location in a jurisdiction where all actions required by Section 6, shall
have been taken with respect to the Accounts Receivable. Borrower will hold and
preserve such records and will permit representatives of Lender at any time
during normal business hours to inspect and make abstracts from such records.

                  (b) Borrower shall immediately notify Lender of (1) any
dispute in excess of $1,000,000 with a Customer, and (2) the bankruptcy,
insolvency, receivership, assignment for the benefit of creditors or suspension
of business of any such Customer of which Borrower has knowledge. Borrower shall
not compromise or discount any Account Receivable without the prior written
consent of Lender except for (i) ordinary trade discounts or allowances for
prompt

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payment, and (ii) prior to the occurrence of a Default or an Event of Default,
such compromises or discounts that, after giving effect thereto, will not cause
85% of the Borrowing Base to be less than the unpaid principal balance of Funded
Debt then outstanding.

                  (c) If required by Lender, upon the occurrence of a Default or
an Event of Default, Borrower shall establish a lockbox for the account of
Borrower with Lender and shall direct all Customers to make payments on Accounts
Receivable to such lockbox by printing such direction on all invoices given to
Customers. Borrower also shall remit to such lockbox all payments on Accounts
Receivable received by Borrower, all such payments to be received in trust for
the benefit of Lender hereunder, and shall be segregated from other funds of
Borrower. Such payments shall be remitted or delivered to such lockbox in their
original form on the day of receipt. All notes, checks and other instruments so
received by Borrower shall be duly endorsed to the order of Lender. The payments
remitted to the lockbox shall be credited to a cash collateral account
maintained by Lender in the name of Borrower over which Lender shall have the
exclusive power of withdrawal. After final collection, funds credited to the
cash collateral account shall be retained in the cash collateral account and be
held as security for the Obligations, and funds in the cash collateral account
may be applied to the Obligations by Lender from time to time, whether or not
such Obligations are then due.

                  (d) Except as otherwise provided in Section 10 (c) or this
Section 10(d), Borrower shall continue to collect, at its own expense, all
amounts due or to become due to Borrower under the Accounts Receivable. In
connection with such collections, Borrower may take (and, at Lender's direction,
shall take) such action as Borrower or Lender may deem necessary or advisable to
enforce collection of the Accounts Receivable; provided, however, that Lender
                                               -----------------
shall have the right, upon the occurrence and during the continuance of any
Event of Default, and upon written notice to Borrower of its intention to do so,
to notify Customers of the assignment of the applicable Accounts Receivable to
Lender and, at the expense of Borrower, to enforce collection of any such
Accounts Receivable, and to adjust, settle or compromise the amount or payment
thereof, in the same manner and to the same extent as Borrower might have done.
After receipt by Borrower of the notice from Lender referred to in the proviso
to the preceding sentence, Borrower shall not adjust, settle or compromise the
amount or payment of any Account Receivable, release any Customer wholly or
partly with respect thereto, or allow any credit or discount thereon.

                  (e) Upon the occurrence of a Default or an Event of Default,
Lender shall have the right, to facilitate direct collection, to take over
Borrower's post office boxes or make other arrangements, with which Borrower
shall cooperate, to receive Borrower's mail.

                  (f) After the occurrence of an Event of Default, Borrower
shall execute all other agreements, instruments and documents and shall perform
all further acts that Lender may require with respect to Accounts Receivable
owing by the Government to ensure compliance with the Assignment of Claims Act.

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         SECTION 11. Defense of Collateral. Each Borrower, at its expense, shall
                     ---------------------
defend the Collateral against any claims or demands adverse to the Security
Party's security interest granted hereunder and shall promptly pay, when due,
all taxes or assessments levied against such Borrower on the Collateral.

         SECTION 12. Lender Appointed Attorney-in-Fact. Each Borrower hereby
                     ---------------------------------
irrevocably appoints Lender as such Borrower's attorney-in-fact (such power
being coupled with an interest), with full authority in the place and stead of
such Borrower and in the name of such Borrower or otherwise, from time to time
in Lender's discretion, to take any action and to execute any instrument that
Lender may deem necessary or advisable to accomplish the purposes of this
Agreement (subject to the rights of such Borrower under Section 10), including,
without limitation:

                  (a) To obtain and adjust insurance required to be paid to
Lender pursuant to Section 9;

                  (b) To ask, demand, collect, sue for, recover, compromise,
receive and give acquittance and receipts for moneys due and to become due under
or in connection with the Collateral;

                  (c) To receive, indorse, and collect any drafts or other
instruments, documents and chattel paper in connection therewith; and

                  (d) To file any claims or take any action or institute any
proceedings that Lender may deem necessary or desirable for the collection of
any of the Collateral, or otherwise to enforce the rights of such Borrower or
Lender with respect to any of the Collateral.

         SECTION 13. Lender May Perform. If any Borrower fails to perform any
                     ------------------
covenant or agreement contained herein, Lender may itself perform, or cause
performance of, such covenant or agreement, and the expenses of Lender incurred
in connection therewith, together with interest thereon at the highest per annum
interest rate in effect under the Loan Agreement plus 3.0%, shall be payable by
such Borrower to Lender on demand and shall constitute Obligations.

         SECTION 14. Lender's Duties. The powers conferred on Lender hereunder
                     ---------------
are solely to protect its interest in the Collateral and shall not impose any
duty upon it to exercise any such powers. Except for the safe custody of any
Collateral in its possession and the accounting for moneys actually received by
it hereunder, Lender shall have no duty as to any Collateral or as to the taking
of any necessary steps to preserve rights against prior parties or any other
rights pertaining to any Collateral. Lender shall be deemed to have exercised
reasonable care in the custody and preservation of any Collateral in its
possession if such Collateral is accorded treatment substantially equal to that
which Lender accords its own property.

                                       11

<PAGE>

         SECTION 15. Remedies. If any Event of Default shall have occurred and
                     --------
be continuing:

                  (a) Lender may exercise in respect of the Collateral, in
addition to any other rights and remedies provided for herein or otherwise
available to it, all the rights and remedies of a Lender on default under the
UCC (to the extent that the UCC applies to the affected Collateral), and also
may (1) require any Borrower to, and such Borrower hereby agrees that it shall,
at such Borrower's expense and upon request of Lender, forthwith assemble all or
part of the Collateral as directed by Lender and make it available to Lender at
a place to be designated by Lender that is reasonably convenient to both
parties, and (2) without notice except as specified below, sell the Collateral
or any part thereof, whether in its then-condition or after further preparation
or processing, either at public or private sale or at any broker's board, in
lots or in bulk, at any time or place, in one or more parcels, at any of
Lender's offices or elsewhere, for cash, on credit or for future delivery, and
upon such other terms as Lender may deem commercially reasonable. Each Borrower
agrees that, to the extent notice of sale shall be required by law, at least ten
days' notice to such Borrower of the time and place of any public sale or the
time after which any private sale is to be made shall constitute reasonable
notification. Lender shall not be obligated to make any sale of Collateral
regardless of notice of sale having been given. Lender may adjourn any public or
private sale from time to time by announcement at the time and place fixed
therefor, and such sale may, without further notice, be made at the time and
place to which it was so adjourned. At any such sale Lender may be the
purchaser, subject to the applicable provisions of the UCC.

                  (b) Any cash held by Lender as Collateral and all cash
proceeds received by Lender in respect of any sale of, collection from, or other
realization upon all or any part of the Collateral may, in the discretion of
Lender, be held by Lender as collateral for, and then or at any time thereafter
be applied (after payment of any amounts payable to Lender pursuant to Section
17) in whole or in part by Lender against all or any part of the Obligations in
such order as Lender shall elect. Any deficiency shall be paid to Lender by any
Borrower forthwith upon demand, and any surplus of such cash or cash proceeds
held by Lender and remaining after payment in full of all the Obligations shall
be paid over to such Borrower or to whomsoever may be lawfully entitled to
receive such surplus.

                  (c) Each Borrower recognizes that, by reason of certain
prohibitions contained in the Securities Act of 1933, as amended, and applicable
state securities laws, Lender may be compelled, with respect to any sale of all
or any part of the Collateral, to limit purchasers to those who will agree,
among other things, to acquire the Collateral for their own account, for
investment and not with a view to the distribution or resale thereof. Each
Borrower acknowledges that any such private sales may be at prices and on terms
less favorable to Lender than those obtainable through a public sale without
such restrictions, and, notwithstanding such circumstances, agree that any such
private sale per se shall not be deemed to have been made in a commercially
unreasonable manner and that Lender shall have no obligation to engage in

                                       12

<PAGE>

public sales and no obligation to delay the sale of any Collateral for the
period of time necessary to permit the respective issuer thereof to register it
for public sale.

         SECTION 16. Private Sale. Lender shall incur no liability as a result
                     ------------
of the sale of the Collateral, or any part thereof, at any private sale pursuant
to Section 16(c) hereof conducted in a commercially reasonable manner. Each
Borrower hereby waives any claims against Lender arising by reason of the fact
that the price at which the Collateral may have been sold at such a private sale
was less than the price that might have been obtained at a public sale or was
less than the aggregate amount of the Obligations, even if Lender accepts the
first offer received and does not offer the Collateral to more than one offeree
so long as such private sale was conducted in a commercially reasonable manner.

         SECTION 17. Indemnity and Expenses. Each Borrower agrees as follows:
                     ----------------------

                  (a) Borrower agrees to indemnify Lender from and against any
and all claims, losses and liabilities (including reasonable attorneys' fees)
growing out of or resulting from this Agreement (including, without limitation,
enforcement of this Agreement), except claims, losses or liabilities resulting
from Lender's gross negligence or willful misconduct.

                  (b) Borrower shall pay to Lender, upon demand, the amount of
any and all reasonable expenses, including the reasonable fees and expenses of
its counsel and of any experts and agents, that Lender may incur in connection
with (1) the administration of this Agreement, (2) the custody, preservation,
use or operation of, or the sale of, collection from, or other realization upon,
any of the Collateral, (3) the exercise or enforcement of any of the rights of
Lender hereunder, or (4) the failure by Borrower to perform or observe any of
the provisions hereof.

                  (c) In any suit, proceeding or action brought by Lender
relating to the Collateral, Borrower will save, indemnify and keep Lender
harmless from and against all expense, loss or damage suffered by reason of any
defense, setoff, counterclaim, recoupment or reduction of liability whatsoever
of the obligor thereunder, arising out of a breach by Borrower of any obligation
thereunder or arising out of any other agreement, indebtedness or liability at
any time owing to or in favor of such obligor or its successors from Borrower,
and all such obligations of Borrower shall be and remain enforceable against and
only against Borrower and shall not be enforceable against Lender.

                  (d) The provisions of this Section 17 shall survive the
termination of this Agreement and the repayment of the Notes and all other
Obligations in full.

         SECTION 18. Security Interest Absolute. All rights of Lender and
                     --------------------------
security interests hereunder, and all obligations of each Borrower hereunder,
shall be absolute and unconditional, irrespective of:

                                       13

<PAGE>

                  (a) Any lack of validity or enforceability of the Loan
Agreement, the Notes or any other Loan Document;

                  (b) Any change in the time, manner or place of payment of, or
in any other term of, all or any of the Obligations, or any other amendment or
waiver of or any consent to any departure from the Loan Agreement, the Notes or
any other Loan Document, including, without limitation, any increase in the
Obligations resulting from the extension of additional credit to any Borrower or
any of its Subsidiaries or otherwise;

                  (c) Any taking, exchange, release or non-perfection of any
other collateral, or any taking, release or amendment or waiver of, consent to
or departure from any guaranty, for all or any of the Obligations;

                  (d) Any manner of application of collateral, or proceeds
thereof, to all or any of the Obligations, or any manner of sale or other
disposition of any collateral for all or any of the Obligations or any other
assets of any Borrower or any of its Subsidiaries;

                  (e) Any change, restructuring or termination of the corporate
structure or existence of any Borrower or any of its Subsidiaries; or

                  (f) Any other circumstance that might otherwise constitute a
defense available to, or a discharge of, any Borrower or a third party grantor
of a security interest.

         SECTION 19. Waivers.
                     -------

                  (a) EACH BORROWER, HAVING KNOWLEDGE THAT IT MAY BE ENTITLED TO
NOTICE AND A HEARING PRIOR TO REPOSSESSION OF THE COLLATERAL, WAIVES ANY RIGHT
THAT IT MAY HAVE UNDER EXISTING OR FUTURE LAW TO NOTICE OF FORECLOSURE (OTHER
THAN NOTICES REQUIRED BY THIS AGREEMENT) AND ANY OTHER ACT DESCRIBED HEREIN OR
IN ANY LOAN DOCUMENT, TO ANY HEARING THAT MAY BE HELD RELATING TO FORECLOSURE OR
ANY OTHER SUCH ACTS, AND TO ANY NOTICE THAT MAY BE REQUIRED TO BE GIVEN BY
LENDER PRIOR TO SUCH HEARING.

                  (b) Each Borrower waives any right to insist upon or plead or
in any way take advantage of any appraisement, valuation, stay, marshalling of
assets, extension, redemption or moratorium law now or hereafter in force and
effect so as to prevent, hinder or delay the enforcement of the provisions of
this Agreement or any Loan Document or any rights or remedies Lender may have
hereunder or thereunder or at law or in equity.

         SECTION 20. Amendments, etc. No amendment or waiver of any provision
                     ---------------
hereof, and no consent to any departure by any Borrower herefrom, shall in any
event be effective unless the

                                       14

<PAGE>

same shall be in writing and signed by Lender, and then such waiver or consent
shall be effective only in the specific instance and for the specific purpose
for which given.

         SECTION 21. Addresses for Notices. All notices and other communications
                     ---------------------
provided for hereunder shall be in writing (including telecopier, telegraphic,
telex or cable communication) and mailed, telecopied, telegraphed, telexed,
cabled, delivered by hand or sent, prepaid, by Federal Express (or a comparable
overnight delivery service) to any Borrower and Lender at their respective
addresses specified in the Loan Agreement, or, as to either party, at such other
address as shall be designated by such party in a written notice to the other
party. Any such notice or other communication, when mailed, telecopied,
telegraphed, telexed, cabled, delivered by hand or sent overnight, shall be
effective on the earliest of (a) the date it is actually received or telecopied,
telexed (confirmed by telex answerback), or delivered by hand, (b) the Business
Day after the day on which it is properly delivered to a telegraph or cable
company or to Federal Express (or a comparable overnight delivery service), as
applicable, or (c) the third Business Day after the day on which it is deposited
in the United States mail.

         SECTION 22. Continuing Security Interest. This Agreement shall create a
                     ----------------------------
continuing security interest in the Collateral and shall (a) remain in full
force and effect until the later of (1) the payment in full of the Obligations,
and (2) the expiration or termination of Lender's commitment to make the Loans
and issue Letters of Credit, (b) be binding upon Borrowers, their respective
successors and assigns, and (c) inure to the benefit of, and be enforceable by,
Lender and its successors, transferees and assigns. Upon the later of the
payment in full of the Obligations and the expiration or termination of the
commitments to make the Loans and issue Letters of Credit, the security interest
granted hereby shall terminate and all rights to the Collateral shall revert to
Borrowers. Upon any such termination, Lender, at Borrowers' expense, shall
execute and deliver to Borrowers such documents as Borrowers shall reasonably
request to evidence such termination.

         SECTION 23. Governing Law; Terms; Jury Trial Waiver. This Agreement
                     ---------------------------------------
shall be governed by and construed in accordance with the laws of the State,
without reference to conflict of laws principles. Unless otherwise defined
herein or in the Loan Agreement, terms used in Article 9 of the UCC are used
herein as therein defined. EACH BORROWER HEREBY WAIVES TRIAL BY JURY IN ANY
LITIGATION IN ANY COURT WITH RESPECT TO THIS AGREEMENT OR THE ENFORCEMENT OR
COLLECTION OF THE OBLIGATIONS.

                          SIGNATURES ON FOLLOWING PAGE

                                       15

<PAGE>

         IN WITNESS WHEREOF, Borrowers have caused this Agreement to be duly
executed and delivered by their respective officers thereunto duly authorized as
of the date first above written.

                                 SRA INTERNATIONAL, INC.,
                                 a Delaware corporation

                                 By: /s/ Stephen C. Hughes
                                     -------------------------------
                                 Name: Stephen C. Hughes
                                       -----------------------------
                                 Title: SVP, CFO
                                       -----------------------------
                                 Organizational No.:________________

                                 SYSTEMS RESEARCH AND APPLICATIONS CORPORATION,
                                 a Delaware corporation

                                 By: /s/ Stephen C. Hughes
                                     -------------------------------
                                 Name: Stephen C. Hughes
                                       -----------------------------
                                 Title: SVP, CFO
                                       -----------------------------
                                 Organizational No.:________________

                                 SRA TECHNICAL SERVICES CENTER, INC.,
                                 a Delaware corporation

                                 By: /s/ Stephen C. Hughes
                                     -------------------------------
                                 Name: Stephen C. Hughes
                                       -----------------------------
                                 Title: SVP, CFO
                                       -----------------------------
                                 Organizational No.:________________

                                       16

<PAGE>

                                   SCHEDULE 1
                                   ----------

                                       to

                               Security Agreement

         Locations of Equipment:
         ----------------------

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------------------
                                                                                           TOTAL             LEASE
-------------------------------------------------------------------------------------------------------------------------
LOCATION                    ADDRESS                                                        SQ/FT            END DATE
-------------------------------------------------------------------------------------------------------------------------
<S>                         <C>                                                                <C>         <C>
ARLINGTON                   2000 15TH STREET NORTH, ARLINGTON VA                               118,335     30-Jun-11
PLAZA
-------------------------------------------------------------------------------------------------------------------------
BALTIMORE                   7104 AMBASSADOR RD. SUITE 275, BALTIMORE MD                          3,346     31-Oct-01
-------------------------------------------------------------------------------------------------------------------------
BALTIMORE                   7102 AMBASSADOR RD, BALTIMORE MD                                     8,879     31-Oct-01
-------------------------------------------------------------------------------------------------------------------------
BREMERTON                   120 WASHINGTON AVE., SUITE 204, BREMERTON, WA                        2,743     31-Oct-01
-------------------------------------------------------------------------------------------------------------------------
DURHAM                      630 DAVIS DRIVE, SUITE 150, DURHAM NC                               10,327     31-Aug-04
-------------------------------------------------------------------------------------------------------------------------
FAIRLAKES                   4300 & 4350 FAIRLAKES COURT, FAIRFAX VA                            264,514     31-Dec-15
-------------------------------------------------------------------------------------------------------------------------
FAIRVIEW HEIGHTS            331 SALEM PLACE, SUITE 200, FAIRVIEW HEIGHTS IL                     10,063     30-Nov-01
-------------------------------------------------------------------------------------------------------------------------
HAMPTON                     328 DIDIGENCE DRIVE, NEWPORT NEWS, VA                                5,150     31-Dec-04
-------------------------------------------------------------------------------------------------------------------------
LEXINGTON PARK              22299 EXPLORATION DRIVE, SUITE 400, LEXINGTON PARK, MD              15,370     14-Jun-03
-------------------------------------------------------------------------------------------------------------------------
LINTHICUM                   939 ELKRIDGE LANDING RD., SUITE 195, LINTHICUM, MD                   4,060     31-Mar-03
-------------------------------------------------------------------------------------------------------------------------
NEW CARROLTON               8201 CORPORATE DRIVE, LANDOVER, MD                                   3,635     31-Mar-06
-------------------------------------------------------------------------------------------------------------------------
NEW YORK                    509 MADISON AVENUE, 10TH FLOOR, NEW YORK NY (SUBLEASED)              3,001     31-Jan-02
-------------------------------------------------------------------------------------------------------------------------
NEW YORK                    ONE STUEBEN PLACE, ALBANY NY                                           110     31-Jul-01
-------------------------------------------------------------------------------------------------------------------------
ROCKVILLE                   ONE CENTRAL PLAZA, 11300 ROCKVILLE PIKE, ROCKVILLE, MD              19,247     28-Feb-05
-------------------------------------------------------------------------------------------------------------------------
SAN ANTONIO                 1777 N.E. LOOP 410, SUITE 510, SAN ANTONIO, TX                      12,527     30-Sep-05
-------------------------------------------------------------------------------------------------------------------------
SAN DIEGO                   2341 JEFFERSON ST, SUITE 200 SAN DIEGO, CA                           3,424     30-Nov-03
-------------------------------------------------------------------------------------------------------------------------
SKYLINE                     5203 LEESBURG PIKE, SUITE 200, FALLS CHURCH VA                      21,999     31-Dec-01
-------------------------------------------------------------------------------------------------------------------------
SKYLINE                     5205 LEESBURG PIKE, SUITE 1300, FALLS CHURCH VA                     16,503     31-Dec-01
-------------------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------
                                                                                               523,233
-------------------------------------------------------------------------------------------------------------------------
</TABLE>

         Locations of Inventory:
         ----------------------

            Not Applicable

                                       17

<PAGE>

                                 Schedule 2.2(c)
                                 ---------------

         For each prepayment of the Term Loan, the Borrowers shall pay to the
Lender a prepayment charge equal to the Economic Revenue Loss for such
prepayment, calculated as set forth below.

         The "Economic Revenue Loss," which shall be calculated for each Prepaid
              ---------------------
Principal Balance, is the difference between the Original Treasury Rate minus
the Current Treasury Rate, expressed in decimals, times the Prepaid Term times
the Prepaid Principal Balance, discounted at the Current Treasury Rate to the
date of prepayment or acceleration. The Economic Revenue Loss shall be
determined by the Bank in good faith and the result, absent manifest error,
shall be conclusive.

         If the Current Treasury Rate is equal to or greater than the Original
Treasury Rate, there is no Economic Revenue Loss.

         The "Original Treasury Rate" is the bond equivalent interest rate per
              ----------------------
annum for a U.S. Treasury security as of the date on which the Term Loan was
disbursed pursuant to the Prior Agreement and with a maturity equal to the term
of the Term Loan.

         The "Current Treasury Rate" is the bond equivalent interest rate per
              ---------------------
annum for a U.S. Treasury security as of the date of prepayment or acceleration
and with a maturity corresponding to the Remaining Term.

         The "Maturity Date" means the date on which the Term Loan matures.
              -------------

         A "Prepaid Principal Balance" is the amount of a principal balance of
            -------------------------
the Term Note that would be outstanding on each Scheduled Payment Date. For
partial prepayments, the determination of each Prepaid Principal Balance shall
be made in the inverse order of maturity, beginning with the Prepaid Principal
Balance due on the Maturity Date. If more than one Prepaid Principal Balance
will be prepaid at the same time, then the Economic Revenue Loss shall be the
sum of the several Economic Revenue Loss calculations for each Prepaid Principal
Balance.

         A "Prepaid Term" is the period beginning on the date of prepayment or
            ------------
acceleration and ending on the Scheduled Payment Date.

         The "Remaining Term" is the period beginning on the date of prepayment
              --------------
or acceleration and ending on the Maturity Date.

         A "Scheduled Payment Date" is a date on which any payment of principal
            ---------------------
or interest, or both, is due with respect to the Term Note.

                                       S-1

<PAGE>

                                  Schedule 4.10
                                  -------------

                                 Corporate Names

Not Applicable

                                       S-2

<PAGE>

                                  Schedule 4.12
                                  -------------

                               Material Contracts

Not Applicable

                                       S-3

<PAGE>

                                  Schedule 4.13
                                  -------------

                              Intellectual Property

Attached to Exhibit "D"

                                       S-4<PAGE>

                                                                   EXHIBIT 10.16

                     COLLATERAL ASSIGNMENT, PATENT MORTGAGE
                             AND SECURITY AGREEMENT

         This Collateral Assignment, Patent Mortgage and Security Agreement (the
"Assignment") dated as of the 15/th/ day of August, 2001, and to become
 ----------
effective in accordance with the provisions set forth below, from SRA
INTERNATIONAL, INC., a Delaware corporation (the "Company"), SYSTEMS RESEARCH
                                                 -------
AND APPLICATIONS CORPORATION, a Delaware corporation ("SRA"), SRA TECHNICAL
                                                       ---
SERVICES CENTER, INC., a Delaware corporation ("STSC"), and each other
                                                ----
Subsidiary that becomes a party to this Assignment in accordance with the
 provisions set forth in the Loan Agreement (together with the Company, SRA, and

 STSC, collectively, "Assignors," and individually, "Assignor"), in favor of
                      ---------                      --------
SUNTRUST BANK, a Georgia banking corporation ("Assignee").
                                               --------

                                    RECITALS
                                    --------

         Assignee has entered into a Loan Agreement of even date herewith (as
amended, modified or supplemented from time to time, the "Loan Agreement," the
                                                          --------------
terms defined therein and not otherwise defined herein being used herein as
therein defined) with Assignors. It is a condition precedent to the making of
the Loans and the issuance of Letters of Credit by Assignee under the Loan
Agreement that each Assignor shall have assigned certain property to Assignee in
accordance with this Assignment.

         NOW, THEREFORE, FOR VALUABLE CONSIDERATION, THE RECEIPT AND SUFFICIENCY
OF WHICH ARE ACKNOWLEDGED, THE PARTIES HERETO AGREE AS FOLLOWS:

         1. Assignment, Patent Mortgage and Grant of Security Interest. As
            ----------------------------------------------------------
collateral security for the prompt and complete payment and performance of the
Obligations (as defined below), each Assignor hereby assigns, transfers, conveys
and grants a security interest and mortgage to Assignee, as security, but not as
an ownership interest, in and to Assignor's entire right, title and interest in,
to and under the following (all of which shall collectively be called the
"Collateral"), provided that the foregoing assignment, transfer, conveyance,
 ----------
grant and mortgage shall not become effective unless and until a Security Event
shall occur under the Loan Agreement:

                  (a) All present and future United States registered copyrights
and copyright registrations, including, without limitation, the registered
copyrights listed in Exhibit A-1 to this Assignment (and including all of the
                     -----------
exclusive rights afforded a copyright registrant in the United States under 17
U.S.C. (s)106 and any exclusive rights which may in the future arise by act of
Congress or otherwise) and all present and future applications for copyright
registrations (including applications for copyright registrations of derivative
works and compilations) (collectively, the "Registered Copyrights"), and any and
                                            ---------------------
all royalties, payments, and other amounts payable to Assignor in connection
with the Registered Copyrights, together with all renewals and extensions of the
Registered Copyrights, the right to recover for all past, present, and future
infringements of the Registered Copyrights, and all computer programs, computer
databases, computer program flow diagrams, source codes, object codes and all
tangible property

<PAGE>

embodying or incorporating the Registered Copyrights, and all other rights of
every kind whatsoever accruing thereunder or pertaining thereto;

                  (b) All present and future copyrights, or contract or license
rights arising from agreements by which Assignor is a licensee, which are not
registered in the United States Copyright Office (the "Unregistered Rights"),
                                                       -------------------
whether now owned or hereafter acquired, including without limitation the
Unregistered Rights listed in Exhibit A-2 to this Assignment, and any and all
                              -----------
royalties, payments, and other amounts payable to Assignor in connection with
the Unregistered Rights, together with all renewals and extensions of the
Unregistered Rights, the right to recover for all past, present, and future
infringements of the Unregistered Rights, and all computer programs, computer
databases, computer program flow diagrams, source codes, object codes and all
tangible property embodying or incorporating the Unregistered Rights, and all
other rights of every kind whatsoever accruing thereunder or pertaining thereto.
The Registered Copyrights and the Unregistered Rights collectively are referred
to herein as the "Copyrights";
                  ----------

                  (c) All right, title and interest in and to any and all
present and future license agreements with respect to the Copyrights, including
without limitation the license agreements listed in Exhibit A-3 to this
                                                    -----------
Assignment (the "Licenses");
                 --------

                  (d) All present and future accounts, accounts receivable and
other rights to payment arising from, in connection with or relating to the
Copyrights;

                  (e) Any and all trade secrets, and any and all intellectual
property rights in computer software and computer software products now or
hereafter existing, owned by Assignor;

                  (f) Any and all design rights which may be owned by Assignor
now or hereafter existing, created, acquired or held;

                  (g) All patents, patent applications and like protections
including, without limitation, improvements, divisions, continuations, renewals,
reissues, extensions and continuations-in-part of the same, including without
limitation the patents and patent applications set forth on Exhibit B attached
                                                            ---------
hereto (collectively, the "Patents"), and any and all royalties, payments, and
                           -------
other amounts payable to Assignor in connection with the Patents, together with
all renewals and extensions of the Patents, the right to recover for all past,
present, and future infringements of the Patents, and all computer programs,
computer databases, computer program flow diagrams, source codes, object codes
and all tangible property embodying or incorporating the Patents, and all other
rights of every kind whatsoever accruing thereunder or pertaining thereto;

                  (h) Any trademark and servicemark rights, whether registered
or not, applications to register, and the entire goodwill of the business of
Assignor connected with and symbolized by such trademarks, including without
limitation those set forth on Exhibit C attached hereto (collectively, the
                              ---------
"Trademarks"), and any and all royalties, payments, and other amounts payable to
 ----------
Assignor in connection with the Trademarks, together with all renewals and
extensions of the Trademarks, and the right to recover for all past, present,
and future infringements of the Trademarks;

                                       2

<PAGE>

                  (i) Any and all claims for damages by way of past, present and
future infringements of any of the rights included above, with the right, but
not the obligation, to sue for and collect such damages for said use or
infringement of the intellectual property rights identified above;

                  (j) All licenses or other rights to use any of the Copyrights,
Patents or Trademarks, and all license fees and royalties arising from such use
to the extent permitted by such license or rights;

                  (k) All amendments, extensions, renewals and extensions of any
of the Copyrights, Trademarks or Patents; and

                  (l) All proceeds and products of the foregoing, including
without limitation all payments under insurance or any indemnity or warranty
payable in respect of any of the foregoing.

THE INTEREST IN THE COLLATERAL BEING ASSIGNED HEREUNDER SHALL NOT BE CONSTRUED
AS A CURRENT ASSIGNMENT, BUT AS A CONTINGENT ASSIGNMENT TO SECURE EACH
ASSIGNOR'S OBLIGATIONS TO ASSIGNEE.

         This Assignment secures the payment of all obligations of each Assignor
now or hereafter existing under the Loan Agreement, including, but not limited
to, the Loans, the Notes, and all obligations, indebtedness and liabilities of
such Assignor under this Assignment and each Letter of Credit Agreement, Letter
of Credit and other Loan Document, and all other obligations, indebtedness and
liabilities of such Assignor to Assignee, whether now existing or hereafter
arising, whether or not evidenced by notes or other instruments, and whether
such obligations, indebtedness and liabilities are direct or indirect, fixed or
contingent, liquidated or unliquidated, due or to become due, joint, several, or
joint and several (all such obligations of such Assignor being the
"Obligations"). Without limiting the generality of the foregoing, this
 -----------
Assignment secures the payment of all amounts that constitute part of the
Obligations and would be owed by each Assignor to Assignee but for the fact that
they are unenforceable or not allowable due to the existence of a bankruptcy,
reorganization or similar proceeding involving such Assignor.

         2. Authorization and Request. Each Assignor authorizes and
            -------------------------
requests that the Register of Copyrights and the Commissioner of Patents and
Trademarks record this conditional assignment.

         3. Covenants and Warranties.  Each Assignor represents, warrants,
            ------------------------
covenants and agrees as follows:

                  (a) Assignor is now the sole owner of its Collateral, except
for non-exclusive licenses granted by Assignor to its Customers in the ordinary
course of business.

                  (b) Listed on Exhibits A-1 and A-2 are all material Copyrights
owned by Assignor, in which Assignor has an interest (excluding off-the-shelf
licensed software and databases), or which are used in Assignor's business.
Listed on Exhibit A-3 are all material Licenses pursuant to which Assignor has a
right to use the Collateral, in which Assignor has an interest (excluding
off-the-shelf licensed software and databases), or which are used in

                                       3

<PAGE>

Assignor's business. Listed on Exhibit B are all material Patents owned by
Assignor, in which Assignor has an interest, or which are licensed to Assignor
for use in Assignor's business. Listed on Exhibit C are all material Trademarks
owned by Assignor, in which Assignor has an interest, or which are used in
Assignor's business.

                  (c) Each employee, agent and/or independent contractor of
Assignor who has participated in the creation of the property constituting the
Collateral has either executed an assignment of his or her rights of authorship
to Assignor or is an employee of Assignor acting within the scope of his or her
employment and was such an employee at the time of said creation.

                  (d) If required by Assignee after the occurrence of a Security
Event, all of Assignor's present and future Collateral (including, without
limitation, software, computer programs and other works of authorship) subject
or entitled to United States copyright, patent or trademark protection, the
sale, licensing or other disposition of which results in royalties receivable,
license fees receivable, accounts receivable or other sums owing to Assignor
(collectively, "Receivables"), shall be registered with the United States
                -----------
Copyright Office or the United States Patent and Trademark Office, as
applicable, and Assignor shall provide to Assignee copies of all such
registrations promptly upon the receipt of the same.

                  (e) Assignor shall undertake all reasonable measures to cause
its employees, agents and independent contractors to assign to Assignor all
rights of authorship to any copyrighted material in which Assignor has or may
subsequently acquire any right or interest.

                  (f) Performance of this Assignment does not conflict with or
result in a breach of any agreement to which Assignor is bound, except to the
extent that certain intellectual property agreements prohibit the disclosure of
information or the assignment of the rights thereunder to a third party without
the licensor's or other party's consent and this Assignment constitutes an
assignment or requires such disclosure.

                  (g) During the term of this Assignment, without the prior
written consent of Assignee, Assignor will not transfer or otherwise encumber
any interest in the Collateral, except for non-exclusive licenses granted by
Assignor in the ordinary course of business or as set forth in this Assignment.

                  (h) Each part of the Collateral is valid and enforceable, and
no part of the Collateral has been judged invalid or unenforceable, in whole or
in part, and no claim has been made that any part of the Collateral violates the
rights of any third party.

                  (i) Assignor shall promptly advise Assignee of any material
change in the composition of the Collateral, including but not limited to any
subsequent ownership right of Assignor in or to any material Trademark, Patent
or Copyright not specified in this Assignment.

                  (j) Assignor shall (1) protect, defend and maintain the
validity and enforceability of the Trademarks, Patents and Copyrights, subject
to Assignor's reasonable business judgment as to the value of the Trademark,
Patent or Copyright, and the cost of such defense, (2) use commercially
reasonable efforts to detect infringements of the Trademarks, Patents and
Copyrights and promptly advise Assignee in writing of material infringements
detected, and (3) not allow any Trademarks, Patents, or Copyrights to be
abandoned, forfeited or dedicated to the public without the written consent of
Assignee, which shall not be unreasonably

                                       4

<PAGE>

withheld, unless Assignor determines that reasonable business practices suggest
that abandonment is appropriate.

                  (k) Assignor shall promptly register the most recent version
of any of Assignor's Copyrights, Trademarks or Patents, if not so already
registered, that are material to Assignor's business, and shall, from time to
time, execute and file such other instruments, and take such further actions as
Assignee may reasonably request from time to time to perfect or continue the
perfection of Assignee's interest in the Collateral.

                  (l) This Assignment creates, and in the case of after acquired
Collateral, this Assignment will create at the time Assignor first has rights in
such after acquired Collateral, in favor of Assignee a valid and perfected first
priority security interest in the Collateral in the United States securing the
payment and performance of the Obligations upon making the filings referred to
in clause (m) below.

                  (m) To its knowledge, except for, and upon, the filing with
the United States Patent and Trademark office with respect to the Patents and
Trademarks and the Register of Copyrights with respect to the Copyrights
necessary to perfect the security interests and assignment created hereunder and
except as has been already made or obtained, no authorization, approval or other
action by, and no notice to or filing with, any U.S. governmental authority or
U.S. regulatory body is required either (1) for the grant by Assignor of the
security interest granted hereby or for the execution, delivery or performance
of this Assignment by Assignor in the U.S. or (2) for the perfection in the
United States or the exercise by Assignee of its rights and remedies thereunder.

                  (n) All information heretofore, herein or hereafter supplied
to Assignee by or on behalf of Assignor with respect to the Collateral is
accurate and complete in all material respects.

                  (o) Assignor shall not enter into any agreement that would
materially impair or conflict with Assignor's obligations hereunder without
Assignee's prior written consent. Assignor shall not permit the inclusion in any
material contract to which it becomes a party of any provisions that could or
might in any way prevent the creation of a security interest in Assignor's
rights and interest in any property included within the definition of the
Collateral acquired under such contracts.

                  (p) Upon any executive officer of Assignor obtaining actual
knowledge thereof, Assignor will promptly notify Assignee in writing of any
event that materially adversely affects the value of any material Collateral,
the ability of Assignor to dispose of any material Collateral or the rights and
remedies of Assignee in relation thereto, including the levy of any legal
process against any of the Collateral.

         4. Assignee's Rights. Assignee shall have the right, but not the
            -----------------
obligation, to take, at each Assignor's sole expense, any actions that such
Assignor is required under this Assignment to take but which such Assignor fails
to take, after fifteen (15) days' notice to such Assignor. Each Assignor shall
reimburse and indemnify Assignee for all reasonable costs and reasonable
expenses incurred in the reasonable exercise of its rights under this Section 4.

                                       5

<PAGE>

         5. Inspection Rights. Each Assignor hereby grants to Assignee and its
            -----------------
employees, representatives and agents the right to visit, during reasonable
hours upon prior reasonable written notice to such Assignor, any of such
Assignor's plants and facilities that manufacture, install or store products (or
that have done so during the prior six-month period) that are sold utilizing any
of the Collateral, and to inspect the products and quality control records
relating thereto upon reasonable written notice to such Assignor and as often as
may be reasonably requested, but not more than one (1) in every six (6) months.

         6. Further Assurances; Attorney in Fact. Each Assignor represents,
            ------------------------------------
warrants, covenants and agrees as follows:

                  (a) Assignor will make, execute, acknowledge and deliver, and
file and record in the proper filing and recording places in the United States,
all such instruments, including, appropriate financing and continuation
statements and collateral agreements and filings with the United States Patent
and Trademarks Office and the Register of Copyrights, and take all such action
as may reasonably be deemed necessary or advisable, or as requested by Assignee,
to perfect Assignee's security interest in all Copyrights, Patents and
Trademarks and otherwise to carry out the intent and purposes of this
Assignment, or for assuring and confirming to Assignee the grant or perfection
of a security interest in all Collateral.

                  (b) Upon an Event of Default, Assignor hereby irrevocably
appoints Assignee as Assignor's attorney-in-fact, with full authority in the
place and stead of Assignor and in the name of Assignor, Assignee or otherwise,
from time to time in Assignee's discretion, upon Assignor's failure or inability
to do so, to take any action and to execute any instrument which Assignee may
deem necessary or advisable to accomplish the purposes of this Assignment,
including:

                           (i) To modify, in its sole discretion, this
Assignment without first obtaining Assignor's approval of or signature to such
modification by amending Exhibit A-1, Exhibit A-2, Exhibit A-3, Exhibit B and
Exhibit C, thereof, as appropriate, to include reference to any right, title or
interest in any Copyrights, Patents or Trademarks acquired by Assignor after the
execution hereof or to delete any reference to any right, title or interest in
any Copyrights, Patents or Trademarks in which Assignor no longer has or claims
any right, title or interest; and

                           (ii) To file, in its sole discretion, one or more
financing or continuation statements and amendments thereto, relative to any of
the Collateral without the signature of Assignor where permitted by law.

         7. Events of Default. The occurrence of any of the following shall
            -----------------
constitute an Event of Default under the Assignment:

                                       6

<PAGE>

                  (a) An Event of Default occurs under the Loan Agreement; or

                  (b) Any Assignor breaches or fails to perform or observe in
any material respect any representation, warranty or agreement made by such
Assignor in this Assignment.

         8. Remedies. Upon the occurrence and continuance of an Event of
            --------
Default, Assignee shall have the right to exercise all the remedies of a secured
party under the UCC, including without limitation, the right to:

                  (a) require any Assignor to assemble any tangible property in
which the Collateral is embodied and in which Assignee has a security interest
and to make it available to Assignee at a place designated by Assignee,

                  (b) exercise any and all rights as beneficial and legal owner
of the Collateral, including, without limitation, any and all consensual rights
and powers with respect to the Collateral, and

                  (c) sell or assign or grant a license to use, or cause to be
sold or assigned or grant a license to use any or all of the Collateral or any
part thereof, in each case, free of all rights and claims of each Assignor
therein and thereto, except to the extent such actions would violate
restrictions against assignments contained in any Collateral in which such
Assignor's rights arise by contract or license. In that connection, Assignee
shall have the right to cause any or all of the Collateral to be transferred of
record into the name of Assignee or its nominee and the right to impose (i) such
limitations and restrictions on the sale or assignment of the Collateral as
Assignee may deem to be necessary or appropriate to comply with any law, rule or
regulation having applicability to such sale or assignment and (ii) requirements
for any necessary governmental approvals. To the extent not inconsistent with
any license or contract under which each Assignor's rights arise, Assignee shall
have a nonexclusive, royalty-free license to use the Copyrights, Patents and
Trademarks to the extent reasonably necessary to permit Assignee to exercise its
rights and remedies upon the occurrence of an Event of Default. Each Assignor
will pay any expenses (including reasonable attorney's fees) incurred by
Assignee in connection with the exercise of any of Assignee's rights hereunder,
including without limitation any expense incurred in disposing of the
Collateral. All of Assignee's rights and remedies with respect to the Collateral
shall be cumulative.

         9. Indemnity. Each Assignor agrees to defend, indemnify and hold
            ---------
harmless Assignee and its officers, employees, and agents against: (a) all
obligations, demands, claims, and liabilities claimed or asserted by any other
party in connection with the transactions contemplated by this Assignment, and
(b) all losses or expenses in any way suffered, incurred, or paid by Assignee as
a result of or in any way arising out of, following or consequential to
transactions between Assignee and such Assignor, whether under this Assignment
or otherwise (including without limitation, reasonable attorneys fees and
reasonable expenses), except for losses arising from or out of Assignee's gross
negligence or willful misconduct.

         10. Release. At such time as Assignors shall completely satisfy all of
             -------
the Obligations, Assignee shall execute and deliver to Assignors all assignments
and other instruments as may be reasonably necessary or proper to terminate
Assignee's security interest and any conditional assignment in the Collateral,
subject to any disposition of the Collateral which may have been made by
Assignee pursuant to this Assignment. For the purpose of this Assignment, the

                                       7

<PAGE>

Obligations shall be deemed to continue if any Assignor enters into any
bankruptcy or similar proceeding at a time when any amount paid to Assignee
could be ordered to be repaid as a preference or pursuant to a similar theory,
and shall continue until it is finally determined that no such repayment can be
ordered.

         11. No Waiver. No course of dealing between any Assignor and Assignee,
             ---------
nor any failure to exercise nor any delay in exercising, on the part of
Assignee, any right, power, or privilege under this Assignment or under the Loan
Agreement or any other agreement, shall operate as a waiver. No single or
partial exercise of any right, power, or privilege under this Assignment or
under the Loan Agreement or any other agreement by Assignee shall preclude any
other or further exercise of such right, power, or privilege or the exercise of
any other right, power, or privilege by Assignee.

         12. Rights Are Cumulative.  All of Assignee's rights and remedies with
             ---------------------

respect to the Collateral whether established by this Assignment, the Loan
Agreement, or any other documents or agreements, or by law shall be cumulative
and may be exercised concurrently or in any order.

         13. Course of Dealing.  No course of dealing, nor any failure to
             -----------------
exercise, nor any delay in exercising any right, power or privilege hereunder
shall operate as a waiver thereof.

         14.  Attorneys' Fees.  If any action relating to this Assignment is
              ---------------
brought by either party hereto against the other party, the prevailing party
shall be entitled to recover reasonable attorneys fees, costs and disbursements.

         15. Amendments. This Assignment may be amended only by a written
             ----------
instrument signed by both parties hereto. To the extent that any provision of
this Assignment conflicts with any provision of the Loan Agreement, the
provision giving Assignee greater rights or remedies shall govern, it being
understood that the purpose of this Assignment is to add to, and not detract
from, the rights granted to Assignee under the Loan Agreement. This Assignment,
the Loan Agreement, and the documents relating thereto comprise the entire
agreement of the parties with respect to the matters addressed in this
Assignment.

         16. Severability. The provisions of this Assignment are severable. If
             ------------
any provision of this Assignment is held invalid or unenforceable in whole or in
part in any jurisdiction, then such invalidity or unenforceability shall affect
only such provision, or part thereof, in such jurisdiction, and shall not in any
manner affect such provision or part thereof in any other jurisdiction, or any
other provision of this Assignment in any jurisdiction.

         17. Counterparts. This Assignment may be executed in two or more
             ------------
counterparts, each of which shall be deemed an original but all of which
together shall constitute the same instrument.

         18. Governing Law and Jurisdiction.  This Assignment shall be governed
             ------------------------------
by the laws of the Commonwealth of Virginia, without regard for choice of law
provisions. Each Assignor and Assignee consent to the nonexclusive jurisdiction
of any state or federal court located in Fairfax County, Virginia.

         19. Confidentiality.  In handling any confidential information, each of
             ---------------
Assignee and its agents shall exercise the same degree of care that its exercise
with respect to its own

                                       8

<PAGE>

proprietary information of the same types to maintain the confidentiality of any
non-public information thereby received or received pursuant to this Assignment
except that the disclosure of this information may be made (a) to the affiliates
of Assignee, (b) to prospective transferee or purchasers of an interest in the
obligations secured hereby, provided that they have entered into a comparable
confidentiality agreement in favor of each Assignor and have delivered a copy to
such Assignor, (c) as required by law, regulation, rule or order, subpoena
judicial order or similar order and (d) as may be required in connection with
the examination, audit or similar investigation of Assignee.

         20. WAIVER OF RIGHT TO JURY TRIAL. ASSIGNEE AND EACH ASSIGNOR EACH
             -----------------------------
HEREBY WAIVE THE RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING BASED UPON,
ARISING OUT OF, OR IN ANY WAY RELATING TO: (a) THIS ASSIGNENT; OR (b) ANY OTHER
PRESENT OR FUTURE INSTRUMENT OR AGREEMENT BETWEEN ASSIGNEE AND SUCH ASSIGNOR; OR
(c) ANY CONDUCT, ACTS OR OMISSIONS OF ASSIGNEE OR SUCH ASSIGNOR OR ANY OF THEIR
DIRECTORS, OFFICERS, EMPLOYEES, AGENTS, ATTORNEYS OR ANY OTHER PERSONS
AFFILIATED WITH ASSIGNEE OR SUCH ASSIGNOR; IN EACH OF THE FOREGOING CASES,
WHETHER SOUNDING IN CONTRACT OR TORT OR OTHERWISE.

                         [SIGNATURES ON FOLLOWING PAGE]

                                       9

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Assignment on
the day and year first above written.

                                           ASSIGNORS:
                                           ----------

                                           SRA INTERNATIONAL, INC.,
                                            a Delaware corporation

Address of Assignor:

                                           By:    /s/ Stephen C. Hughes
                                                  -----------------------------
4300 Fair Lakes Court                      Name:  Stephen C. Hughes
Fairfax, Virginia  22033                          -----------------------------
                                           Title: SVP, CFO
                                                  -----------------------------

                                           SYSTEMS RESEARCH AND APPLICATIONS
                                           CORPORATION,
                                            a Delaware corporation

Address of Assignor:

                                           By:    /s/ Stephen C. Hughes
                                                  -----------------------------
4300 Fair Lakes Court                      Name:  Stephen C. Hughes
Fairfax, Virginia  22033                          -----------------------------
                                           Title: SVP, CFO
                                                  -----------------------------

                                           SRA TECHNICAL SERVICES CENTER, INC.,
                                            a Delaware corporation

Address of Assignor:

                                           By:    /s/ Stephen C. Hughes
                                                  -----------------------------
4300 Fair Lakes Court                      Name:  Stephen C. Hughes
Fairfax, Virginia  22033                          -----------------------------
                                           Title: SVP, CFO
                                                  -----------------------------

                                           ASSIGNEE:
                                           ---------

                                           SUNTRUST BANK, a Georgia banking
                                           corporation
Address of Assignee:

                                           By:      ___________________________
1445 New York Avenue, N.W.                 Name:    ___________________________
Washington, D.C.  20005                    Title:   ___________________________

                                       10

<PAGE>

              State      OF    Virginia
         --------------      -------------  )

         COUNTY OF       Fairfax
                   -------------------      )

         On       August 17,       2001, before me,       Linda Dailey
            ---------------------                   --------------------------
_________________________________________, Notary Public, personally appeared

               Stephen C. Hughes
-----------------------------------------------------------------------,
personally known to me (or proved to me on the basis of satisfactory evidence)
to be the person(s) whose name(s) is/are subscribed to the within instrument and
acknowledged to me that he/she/they executed the same in his/her/their
authorized capacity(ies), and that by his/her/their signature(s) on the
instrument the person(s), or the entity upon behalf of which the person(s)
acted, executed the instrument.

         Witness my hand and official seal.

                                                /s/ Linda L. Dailey
                                                -------------------------------
                                                Notary Public

(Seal)

             State       OF   Virginia
         --------------     -------------   )

         COUNTY OF       Fairfax
                   -------------------      )

         On       August 17,       2001, before me,       Linda Dailey
            ---------------------                   --------------------------
_________________________________________, Notary Public, personally appeared

               Stephen C. Hughes
-----------------------------------------------------------------------,
personally known to me (or proved to me on the basis of satisfactory evidence)
to be the person(s) whose name(s) is/are subscribed to the within instrument and
acknowledged to me that he/she/they executed the same in his/her/their
authorized capacity(ies), and that by his/her/their signature(s) on the
instrument the person(s), or the entity upon behalf of which the person(s)
acted, executed the instrument.

         Witness my hand and official seal.

                                                /s/ Linda L. Dailey
                                                -------------------------------
                                                Notary Public

(Seal)

             State       OF    Virginia
         --------------      -------------  )

         COUNTY OF      Fairfax
                   -------------------      )

         On       August 17,       2001, before me,       Linda Dailey
            ---------------------                   --------------------------
_________________________________________, Notary Public, personally appeared

               Stephen C. Hughes
-------------------------------------------------------------------------,
personally known to me (or proved to me on the basis of satisfactory evidence)
to be the

                                       11

<PAGE>

person(s) whose name(s) is/are subscribed to the within instrument and
acknowledged to me that he/she/they executed the same in his/her/their
authorized capacity(ies), and that by his/her/their signature(s) on the
instrument the person(s), or the entity upon behalf of which the person(s)
acted, executed the instrument.

         Witness my hand and official seal.

                                                /s/ Linda L. Dailey
                                                -------------------------------
                                                Notary Public

(Seal)

         ______________ OF _____________    )

         COUNTY OF ___________________      )

         On _____________________, 2001, before me, __________________________
_________________________________________, Notary Public, personally appeared
_______________________________________________________________________,
personally known to me (or proved to me on the basis of satisfactory evidence)
to be the person(s) whose name(s) is/are subscribed to the within instrument and
acknowledged to me that he/she/they executed the same in his/her/their
authorized capacity(ies), and that by his/her/their signature(s) on the
instrument the person(s), or the entity upon behalf of which the person(s)
acted, executed the instrument.

         Witness my hand and official seal.

                                                -------------------------------
                                                Notary Public

(Seal)

         ______________ OF _____________    )

         COUNTY OF ___________________      )

         On _____________________, 2001, before me, __________________________
_________________________________________, Notary Public, personally appeared
_______________________________________________________________________,
personally known to me (or proved to me on the basis of satisfactory evidence)
to be the person(s) whose name(s) is/are subscribed to the within instrument and
acknowledged to me that he/she/they executed the same in his/her/their
authorized capacity(ies), and that by his/her/their signature(s) on the
instrument the person(s), or the entity upon behalf of which the person(s)
acted, executed the instrument.

         Witness my hand and official seal.

                                       12

<PAGE>

                                                -------------------------------
                                                Notary Public

(Seal)

                                       13

<PAGE>

                                  EXHIBIT "A-1"

                              REGISTERED COPYRIGHTS

REG. NO.                   REG. DATE                              COPYRIGHT
--------                   ---------                              ---------

<PAGE>

                                  EXHIBIT "A-2"

                               UNREGISTERED RIGHTS

<PAGE>

                                  EXHIBIT "A-3"

                   DESCRIPTION OF COPYRIGHT LICENSE AGREEMENTS
                   -------------------------------------------

<PAGE>

                                   EXHIBIT "B"

                                     PATENTS

DOCKET NO.        COUNTRY         SERIAL NO.       FILING DATE           STATUS
----------        -------         ----------       -----------           ------

<PAGE>

                                   EXHIBIT "C"

                                   TRADEMARKS

MARK              COUNTRY              SERIAL NO.                   STATUS
----              -------              ----------                   ------

<PAGE>

<TABLE>
<CAPTION>
Friday, August 17, 2001                 Client Status Report - PATENT INVENTORY                                             Page 1

           Client:  06551                   SRA INTERNATIONAL, INC.
------------------------------------------------------------------------------------------------------------------------------------
                                                           Case Number      Sub     Application       Patent No.
Title                                                      Status           Case    Number/Date       Issue Date      Attorney(s)
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>              <C>     <C>               <C>                  <C>
PROTECTION OF AN ELECTRONICALLY STORED
IMAGE IN A FIRST COLOR SPACE BY THE                        06551-0062       02      828,924/08        5,893,101            JAB
ALTERATION OF DIGITAL COMPONENT IN A
SECOND COLOR SPACE                                         ISSUED                   28-Mar-1997       06-Apr-1999
United States of America

------------------------------------------------------------------------------------------------------------------------------------
CONTENT DISTRIBUTION SYSTEM AND METHOD
United States of America                                   06551-0069       00      839,176/09                             JAB

                                                           Pending                  23-Apr-2001                            JEP

------------------------------------------------------------------------------------------------------------------------------------
A LARGE-SCALE RELATION AND EVENT EXTRACTION SYSTEM
United States of America                                   06551-6000       00      251,421/60                             JAB

                                                           Pending                  06-Dec-2000

------------------------------------------------------------------------------------------------------------------------------------
LARGE-SCALE RELATION AND EVENT EXTRACTION SYSTEM

United States of America                                   06551-6001       00                                             JAB

                                                           INACTIVE

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
Friday, August 17, 2001                 Client Status Report - PATENT INVENTORY              Page 1

           Client:  06551                   SRA INTERNATIONAL, INC.
---------------------------------------------------------------------------------------------------------
                                                            Next Action(s)                Due Date(s)
---------------------------------------------------------------------------------------------------------
<S>                                                         <C>                           <C>
                                                            3 YR CALLUP -                 06-Apr-2002
                                                            Tax 3.5                       06-Oct-2002
                                                            MAINT/SCHG DUE                06-Apr-2003
                                                            7 YR CALLUP -                 06-Apr-2006
                                                            Tax 7.5                       06-Oct-2006
                                                            MAINT/SCHG DUE                06-Apr-2007
                                                            11 YR CALLUP -                06-Apr-2010
                                                            Tax 11.5                      06-Oct-2010
                                                            MAINT/SCHG DUE                06-Apr-2011
---------------------------------------------------------------------------------------------------------
                                                            Benefit of Priority           23-Aug-2001
                                                            IDS CALLUP                    23-Aug-2001
                                                            IDS CALLUP                    23-Sep-2001
                                                            IDS DUE                       23-Oct-2001
                                                            8-MO REMINDER DUE             23-Dec-2001
                                                            11-MO REMINDER DUE            23-Mar-2002
                                                            CALL CLIENT                   17-Apr-2002
                                                            APPLN STATUS                  23-Apr-2002
                                                            CONVENTION DATE               23-Apr-2002
---------------------------------------------------------------------------------------------------------
                                                            2 MONTH CALLUP                06-Oct-2001
                                                            11-MO REMINDER DUE            06-Nov-2001
                                                            3 WEEK CALLUP                 15-Nov-2001
                                                            2 WEEK CALLUP                 22-Nov-2001
                                                            5 DAY CALLUP                  01-Dec-2001
                                                            CALL CLIENT                   01-Dec-2001
                                                            APPLICATION DUE               06-Dec-2001
                                                            CONVENTION DATE               06-Dec-2001
---------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
SRA Trademark Inventory

Our Reference        Country        Mark                        Application      Application     Registration          Class
                                                                Number           Date            Number
------------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>            <C>                         <C>              <C>             <C>                   <C>
06551 0003 00337     European       SRA                         1081298          2/18/1999       1081298               9, 16, 35,
                     Community                                                                                         41, 4
Status:                             Goods And Services:         COMPUTER SOFTWARE AND HARDWARE; COMPUTER
                                                                SOFTWARE FOR USE IN SURVEILLANCE AND
REGISTERED                                                      MONITORING OF ELECTRONIC TEXT COMMUNICATIONS;
                                                                COMPUTER SOFTWARE FOR USE WITH GLOBAL
                                                                COMPUTER NETWORKS AND INTERNAL NETWORKS;
                                                                LOGISTICS MANAGEMENT SOFTWARE...
------------------------------------------------------------------------------------------------------------------------------------
06551 0003 00000     United States  SRA                         159,989/75       8/22/1996       2,094,996             09
                     of America
Status:                             Goods And Services:         COMPUTER SOFTWARE FOR USE IN CONNECTION WITH
                                                                GLOBAL COMPUTER NETWORKS AND INTERNAL CORPORATE
                                                                NETWORKS, AND LOGISTS MANAGEMENT SOFTWARE
REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0004 00000     United States  SRA                         159,981/75       8/22/1996       2,290,369             09
                     of America
Status:                             Goods And Services:         COMPUTER SOFTWARE FOR USE IN LEGAL, AND
                                                                FINANCIAL APPLICATIONS
REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0005 00000     United States  SRA                         159,926/75       8/22/1996       2,097,456             42
                     of America
Status:                             Goods And Services:         INFORMATION TECHNOLOGY CONSULTING SERVICES
                                                                IN THE FIELDS OF TELECOMMUNICATIONS, COMPUTER
                                                                NETWORKING, BUSINESS REENGINEERING,...
REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0008 00000     United States  SRA LOGO                    172,514/75       9/26/1996       2,296,347             09
                     of America
Status:                             Goods And Services:         COMPUTER SOFTWARE, NAMELY SEARCH ENGINES;
                                                                ARCHIVING SOFTWARE; SOFTWARE THAT RECOGNIZES
REGISTERED                                                      AND ANALYZES PATTERNS IN DATABASES; SOFT-WARE
                                                                FOR SCHEDULING TRANSPORTATION, ACQUISITION, AND
                                                                DEPLOYMENT OF EQUIPMENT AND PERSONNEL; SOFTWARE
                                                                THAT CONSOLIDATES, SUMMARIZES, AND ANALYZES
                                                                BUSINESS INFORMATION; GLOBAL COMPUTER NETWORK
                                                                SURVEILANCE SOFTWARE
------------------------------------------------------------------------------------------------------------------------------------

Thursday, August 16, 2001                                                                                                Page 1 of 6
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
Our Reference        Country        Mark                        Application      Application     Registration          Class
                                                                Number           Date            Number
------------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>            <C>                         <C>              <C>             <C>                   <C>
06551 0008 00337     European       SRA LOGO                    1080563          2/18/1999       1080563               09, 16, 35,
                     Community                                                                                         41,4
Status:                             Goods And Services:         COMPUTER SOFTWARE AND HARDWARE; COMPUTER
                                                                SOFTWARE FOR USE IN SURVEILLANCE AND MONITORING
REGISTERED                                                      OF ELECTRONIC TEXT COMMUNICATIONS; COMPUTER
                                                                SOFTWARE FOR USE WITH GLOBAL COMPUTER NETWORKS
                                                                AND INTERNAL NETWORKS; LOGISTICS MANAGEMENT
                                                                SOFTWARE...
------------------------------------------------------------------------------------------------------------------------------------
06551 0009 00000     United States  SRA LOGO                    172,515/75       9/26/1996       2,177,402             42
                     of America
Status:                             Goods And Services:         INFORMATION TECHNOLOGY CONSULTING SERVICES
                                                                IN THE FIELDS OF TELECOMMUNICATION, COMPUTER
REGISTERED                                                      NETWORKING, BUSINESS REENGINEERING,...

------------------------------------------------------------------------------------------------------------------------------------
06551 0010 00000     United States  MEDIATRIEVE                 673,513/74       5/15/1995                             10
                     of America
Status:                             Goods And Services:         COMPUTER SOFTWARE FOR SEARCHING FULL-TEXT
                                                                DATABASES, RETRIEVAL AND DISPLAY OF IMAGES
ABANDONED                                                       AND OTHER NON-TEXTUAL DATA AND MANUALS SOLD...

------------------------------------------------------------------------------------------------------------------------------------
06551 0012 00337     European       ASSENTOR (IN BLOCK LETTERS  731174           1/26/1998       731174                35, 42
                     Community

Status:                             Goods And Services

REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0012 00000     United States  ASSENTOR                    332,708/75       7/29/1998       2,217,925             009
                     of America
Status:                             Goods And Services          COMPUTER SOFTWARE FOR USE IN SURVEILLANCE
                                                                AND MONITORING OF ELECTRONIC TEXT COMMUNICATIONS

REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0013 00000     United States  KDD EXPLORER                428,243/75       2/3/1998        2,333,711             9
                     of America
Status:                             Goods And Services:         DATA MINING SOFTWARE, NAMELY, SOFTWARE THAT
                                                                RECOGNIZES AND ANALYZES PATTERNS IN DATABASE

REGISTERED

------------------------------------------------------------------------------------------------------------------------------------

Thursday, August 16, 2001                                                                                                Page 2 of 6
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
Our Reference        Country        Mark                        Application      Application     Registration          Class
                                                                Number           Date            Number
------------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>            <C>                         <C>              <C>             <C>                   <C>
06551 0017 00000     United States  ELITE                       428,242/75       2/3/1998        2,376,468             35
                     of America
Status:                             Goods And Services:         BUSINESS CONSULTING SERVICE IN THE FIELDS
                                                                OF STRATEGIC PLANNING, BUSINESS PROCESS
REGISTERED                                                      RE-ENGINEERING, SYSTEM DEVELOPMENT ETC...

------------------------------------------------------------------------------------------------------------------------------------
06551 0018 0000      United States  WE'RE JUST BETTER AT THINS
                     of America

Status:                             Goods And Services:

INACTIVE

------------------------------------------------------------------------------------------------------------------------------------
06551 0019 00000     United States  BIZCASE                     124,665/75       6/24/1996       2,063,331             9, 21, 23,
                     of America                                                                                        26, 3
Status:                             Goods And Services:

REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0020 00000     United States  IMPRINT                     689,899/74       6/16/1995       1,980,996             09, 21, 23,
                     of America                                                                                        26, 36,
Status:                             Goods And Services:

REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0021 00000     United States  SRA CORPORATION             314,327/74       9/16/1992       1,773,279             42
                     of America
Status:                             Goods And Services:         COMPUTER CONSULTATION; NAMELY, DEVELOPING
                                                                SOLUTIONS FOR MANAGEMENT PROBLEMS THROUGH
REGISTERED                                                      SYSTEMS ANALYSIS AND DESIGN, SOFTARE
                                                                CUSTOMIZATION...

------------------------------------------------------------------------------------------------------------------------------------
06551 0022 00000     United States  ELITE 2000                  438,197/75       2/23/1998                             35
                     of America
Status:                             Goods And Services:         BUSINESS CONSULTING SERVICES IN THE FILES
                                                                OF STRATEGIC PLANNING, NUSINESS PROCESS
                                                                RE-ENGINEERING, SYSTEM DEVELOPMENT AND
                                                                INTEGRATION,
ABANDONED

------------------------------------------------------------------------------------------------------------------------------------
06551 0027 00000     United States  ARCHIPELAGO                 503,005/75       6/16/1998                             009
                     of America
Status:                             Goods And Services          SOFTWARE TO MANAGE COMPUTER IN A
                                                                NETWORK AND COMPONTS THEREOF

ABANDONED
------------------------------------------------------------------------------------------------------------------------------------

Thursday, August 16, 2001                                                                                                Page 3 of 6
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
Our Reference        Country        Mark                        Application      Application     Registration          Class
                                                                Number           Date            Number
------------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>            <C>                         <C>              <C>             <C>                   <C>
06551 0037 00000     United States  SRA INSITE                  574,363/75       10/21/1998      2,346,684             09
                     of America
Status:                             Goods And Services:         COMPUTER SOFTWARE FOR ORGANIZING INTERNAL
                                                                NETWORKS, DATABASES, AND WEBSITES

Registered

------------------------------------------------------------------------------------------------------------------------------------
06551 0040 00000     United States  ISOQUEST AND DESIGN         264,906/75       6/27/1997       2,123,824             09
                     of America
Status:                             Goods And Services:         COMPUTER SOFTWARE FOR DATA EXTRACTION AND
                                                                INDEXING FOIR USE IN ELECTRONIC PUBLISHING
                                                                AND ON-LINE ONFORMATION SERVICES,...ETC.
REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0041 00000     United States  ISOQUEST                    264,905/75       3/27/1997       2,212,287             09
                     of America
Status:                             Goods And Services          COMPUTER SOFTWARE FOR DATA EXTRACTION AND
                                                                INDEXING FOR USE IN ELECTRONIC PUBLISHING
                                                                AND ON-LINE INFORMATION SERVICES,...
REGISTERED

------------------------------------------------------------------------------------------------------------------------------------
06551 0042 00000     United States  OWL DESIGN                  408,756/75       12/19/1997      2,308,361             09;42
                     of America
Status:                             Goods And Services:         09: COMUPTER SOFTWARE FOR SEARCING ELECTRONIC
                                                                TEXT WHICH COMBINES ADVANCED INFORMATION
REGISTERED                                                      RETRIEVAL,  AUTOMATIC INDEXINF AND UUTOMATED
                                                                HYPERTEXT AUTHORIING AND MANUALS LICENSED
                                                                THEREWITH.

                                                                42: SERVICES DIRECTED TO DEVELOPING COMUTER
                                                                FORWARE FOR SEARCHING ELECTRONIC TEXTS WHICH
                                                                COMBINES ADVANCED INFORMATION RETRIEVAL,
                                                                AUTOMATIC INDEXING AND AUTOMATED HYPERTEXT
                                                                AUTHORING.
------------------------------------------------------------------------------------------------------------------------------------
06551 0043 00000     United States  INTELLIGENCE DISCOVERY      403,661/75       12/11/1997                            09;42
                     of America
Status:                             Goods And Services:         09: COMPUTER SOFTWARE FOR SEARCHING ELECTRONIC
                                                                TEXT WHICH COMBINES...

                                                                42: SERVICES DIRECTED TO DEVELOPING COMPUTER
                                                                SOFTWARE FOR SEARCHING...
ABANDONED

------------------------------------------------------------------------------------------------------------------------------------

Thursday, August 16, 2001                                                                                                Page 4 of 6
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
Our Reference        Country        Mark                        Application      Application     Registration          Class
                                                                Number           Date            Number
------------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>            <C>                         <C>              <C>             <C>                   <C>
06551 0044 00000     United States  NETOWL                      393,522/75       11/20/1997                            09
                     of America
Status:                             Goods And Services:         COMPUTER SOFTARE FOR SEARCHING ELECTRONIC TEXT
                                                                WHICH COMBINES ADVANCED INFORMATION RETRIEVAL,
                                                                AUTOMATIC INDEXING AND AUTOMATD...
PENDING

------------------------------------------------------------------------------------------------------------------------------------
06551 0045 00000     United States  DTCPACK                     849,203/75       11/16/1999                            42
                     of America
Status:                             Goods And Services:         COMPUTER, TELECOMMUNICATIONS, AND TECHNOLOGY
                                                                CONSULTING SERVICES, NAMELY DEVELOPMENT OF AN
                                                                INTEGRATED VOICE AND DATA OFFIC ENVIRONMENT
PENDING

------------------------------------------------------------------------------------------------------------------------------------
06551 0046 00000     United States  DEPLOYABLE TELECOMMUNIC     849,202/75       11/16/1999                            42
                     of America
Status:                             Goods And Services:         COMPUTER, TELECOMMUNICATIONS, AND TECHNOLOGY
                                                                CONSULTING SERVICES, NAMELY DEVELOPMENT OF AN
                                                                INTEGRATED VOICE AND DATA OFFIC EENVIRONMENT
PENDING

------------------------------------------------------------------------------------------------------------------------------------
06551 0055 00000     United States  FASTVALUE                   040,075/76       5/3/2000
                     of America
Status:                             Goods And Services:         CONSULTING SERVICES IN THE FIELD OF INTEGRATION
                                                                AND MAINTENANCE OF SOFTWARE PROGRAMS AND COMPUTER
                                                                SYSTEMS FOR OTHERS TO IMPROVE BUSINESS
ABANDONED                                                       MANAGEMENT AND EFFICIENCY
------------------------------------------------------------------------------------------------------------------------------------
06551 0056 00000     United States  SUSTAINVALUE                040,473/76       5/3/2000
                     of America
Status:                             Goods And Services:         CONSULTING SERVICES IN THE FIELD OF INTEGRATION
                                                                AND MAINTENANCE OF SOFTWARE PROGRAMS AND COMPUTER
                                                                SYSTEMS FOR OTHERS TO IMPROVE BUSINESS
ABANDONED                                                       MANAGEMENT AND EFFICIENCY
------------------------------------------------------------------------------------------------------------------------------------
06551 0060 00337     European       DISCOVEREASE                2091304          2/16/2001                             9,35,42
                     Community
Status:                             Goods And Services:         SOFTWARE AND HARDWARE FOR USE IN THE LEGAL
                                                                PROFESSION, CL. 9; BUSINESS CONSULTING, CL 35;
                                                                INFORMATION TECHNOLOGY CONSULTING, CL 42
PENDING

------------------------------------------------------------------------------------------------------------------------------------

Thursday, August 16, 2001                                                                                                Page 5 of 6
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
Our Reference        Country        Mark                        Application      Application     Registration          Class
                                                                Number           Date            Number
------------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>            <C>                         <C>              <C>             <C>                   <C>
06551 0060 00000     United States  DISCOVEREASE                120,150/76       8/30/2000                             9
                     of America
Status:                             Goods And Services:         SOFTWARE AND HARDWARE FOR USE IN THE
                                                                LEGAL PROFESSION

PENDING

------------------------------------------------------------------------------------------------------------------------------------
06551 0065 00000     United States  GISTIT                      155,569/76       10/27/2000                            09,38
                     of America
Status:                             Goods And Services:         9 - COMPUTER SOFTWARE TO ENABLE THE USER
                                                                TO EDIT, SUMMARIZE, ABRIDGE, AND EXTRACT
                                                                CONTENT FROM E-MAIL CORRESPONDENCE, WEB
PENDING                                                         SITES AND OTHER SOURCES

                                                                38 - TELECOMMUNICATION SERVICES TO ENABLE
                                                                USERS TO EDIT, SUMMARIZE, ABRIDGE, AND
                                                                EXTRACT CONTENT FROM E-MAIL CORRESPONDENCE,
                                                                WEB SITES, AND OTHER SOURCES
------------------------------------------------------------------------------------------------------------------------------------
06551 0071 00000     United States  TAPESTRY TECHNOLOGY         270,729/76       6/14/2001                             09 & 42
                     of America
Status:                             Goods And Services          009 - SOFTWARE FOR VISUALIZATION, MANAGEMENT,
                                                                ANALYSIS, AND STORAGE OF BIOLOGICAL, BIOMEDICAL,
                                                                GENETIC, AND PHARMACEUTICAL INFORMATION AND
PENDING                                                         DATA

                                                                042 - ONLINE SERVICES, NAMELY PROVIDING ACCESS
                                                                TO TOOLS FOR VISUALIZATION, MANAGEMENT, ANALYSIS,
                                                                AND STORAGE OF BIOLOGICAL, BIOMEDICAL, GENETIC,
                                                                AND PHARMACEUTICAL INFORMATION AND DATA
------------------------------------------------------------------------------------------------------------------------------------
06551 0072 00000     United States  BIOSILK                     270,730/76       6/14/2001                             09 & 42
                     of America
Status:                             Goods And Services:         9- Software for visualization, management,
                                                                analysis, and storage of biological, biomedical,
                                                                genetic, and pharmaceutical information and
PENDING                                                         data

                                                                42- Online services, namely providing access
                                                                to tools for visualization, management,
                                                                analysis, and storage of biological,
                                                                biomedical, genetic, and pharmaceutical
                                                                information and data
------------------------------------------------------------------------------------------------------------------------------------

Thursday, August 16, 2001                                                                                                Page 6 of 6
</TABLE>

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