Document:

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                                                                    Exhibit 4.8

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                          iBASIS SECURITIES CORPORATION

                                    GUARANTEE

                          Dated as of January 30, 2003

               U.S. Bank National Association, as Collateral Agent

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                                TABLE OF CONTENTS

<TABLE>
<S>     <C>                                                                                              <C>
1.       Reference to Exchange Agreement; Definitions; Certain Rules of Construction.......................  1
         1.1.     "Agreement"..............................................................................  1
         1.2.     "Obligors"...............................................................................  1
2.       Guarantee.........................................................................................  1
         2.1.     Guarantee of Obligations.................................................................  1
         2.2.     Continuing Obligation....................................................................  2
         2.3.     Waivers with Respect to Obligations......................................................  2
         2.4.     Investors' Power to Waive, etc...........................................................  4
         2.5.     Information Regarding the Borrower, etc..................................................  4
         2.6.     Certain Guarantor Representations........................................................  5
         2.7.     Subrogation..............................................................................  5
         2.8.     Subordination............................................................................  6
         2.9.     Future  Subsidiaries; Further Assurances.................................................  6
3.       Representations and Warranties....................................................................  6
         3.1.     Organization and Business................................................................  6
         3.2.     Authorization and Enforceability.........................................................  7
         3.3.     No Legal Obstacle to Agreements..........................................................  7
         3.4.     Litigation...............................................................................  7
4.       Successors and Assigns............................................................................  8
5.       Notices...........................................................................................  8
6.       Reimbursement of Expenses.........................................................................  8
7.       Venue; Service of Process.........................................................................  8
8.       WAIVER OF JURY TRIAL..............................................................................  9
9.       General...........................................................................................  9
</TABLE>

                                       i

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                          iBASIS SECURITIES CORPORATION

                                    GUARANTEE

         This Agreement, dated as of January 30, 2003, is among iBasis
Securities Corporation, a Massachusetts corporation (the "GUARANTOR"), and U.S.
Bank National Association, as Collateral Agent (the "COLLATERAL AGENT") for
itself and the Holders under the Exchange Agreement (as defined below). The
parties agree as follows:

1. REFERENCE TO EXCHANGE AGREEMENT; DEFINITIONS; CERTAIN RULES OF CONSTRUCTION.
Reference is made to the Securities Exchange Agreement dated as of the date
hereof, as from time to time in effect (the "EXCHANGE AGREEMENT"), among iBasis,
Inc., a Delaware corporation (the "COMPANY"), iBasis Global, Inc., a Delaware
corporation ("iBASIS GLOBAL", and collectively with the Company, the
"BORROWER"), the Guarantor, the Symphony Funds and the Collateral Agent.
Capitalized terms defined in the Exchange Agreement and not otherwise defined
herein are used herein with the meanings so defined. Certain other capitalized
terms are used in this Agreement as specifically defined below in this Section
1. Except as the context otherwise explicitly requires, (a) the capitalized term
"Section" refers to sections of this Agreement, (b) the capitalized term
"Exhibit" refers to exhibits to this Agreement, (c) references to a particular
Section shall include all subsections thereof, (d) the word "including" shall be
construed as "including without limitation", (e) references to a particular
statute or regulation include all rules and regulations thereunder and any
successor statute, regulation or rules, in each case as from time to time in
effect and (f) references to a particular Person include such Person's
successors and assigns to the extent not prohibited by this Agreement and the
other Credit Documents. References to "the date hereof" mean the date first set
forth above.

         1.1. "AGREEMENT" means this Guarantee as from time to time in effect.

         1.2. "OBLIGORS" means the Borrower, the Guarantor and the Subsidiaries
of the Borrower party hereto as guarantors from time to time.

2. GUARANTEE.

         2.1. GUARANTEE OF OBLIGATIONS. The Guarantor unconditionally guarantees
that the Obligations will be performed and paid in full in cash when due and
payable, whether at the stated or accelerated maturity thereof or otherwise,
this guarantee being a guarantee of payment and not of collectability and being
absolute and in no way conditional or contingent. In the event any part of the
Obligations shall not have been so paid in full when due and payable, the
Guarantor will, immediately upon notice by the Collateral Agent or, without
notice, immediately upon the occurrence of a Bankruptcy Default, pay or cause to
be paid to the Collateral Agent for the account of each Holder in accordance
with the Holder's respective Percentage Interests

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therein the amount of such Obligations which are then due and payable and
unpaid. The obligations of the Guarantor hereunder shall not be affected by the
invalidity, unenforceability or irrecoverability of any of the Obligations as
against the Borrower, any other Obligor, any other guarantor thereof or any
other Person. For purposes hereof, the Obligations shall be due and payable when
and as the same shall be due and payable under the terms of the Exchange
Agreement or any other Credit Document notwithstanding the fact that the
collection or enforcement thereof may be stayed or enjoined under the Bankruptcy
Code or other applicable law.

         2.2. CONTINUING OBLIGATION. The Guarantor acknowledges that the
Symphony Funds have entered into the Exchange Agreement (and, to the extent that
the Symphony Funds, any Holder or holder of any interest in the Obligations or
the Collateral Agent may enter into any future Credit Document, will have
entered into such agreement) in reliance on this Section 2 being a continuing
irrevocable agreement, and the Guarantor agrees that its guarantee may not be
revoked in whole or in part. The obligations of the Guarantor hereunder shall
terminate when all of the Obligations have been indefeasibly paid in full in
cash and discharged; PROVIDED, HOWEVER, that if a claim is made upon the Holders
at any time for repayment or recovery of any amounts or any property received by
the Holders from any source on account of any of the Obligations and the Holders
repay or return any amounts or property so received (including interest thereon
to the extent required to be paid by the Holders), then the Guarantor shall
remain liable under this Agreement for the amounts so repaid or property so
returned or the amounts for which the Holders become liable (such amounts being
deemed part of the Obligations) to the same extent as if such amounts or
property had never been received by the Holders, notwithstanding any termination
hereof or the cancellation of any instrument or agreement evidencing any of the
Obligations. Not later than five days after receipt of notice from the
Collateral Agent, the Guarantor shall pay to the Collateral Agent an amount
equal to the amount of such repayment or return for which the Holders have so
become liable. Payments hereunder by the Guarantor may be required by the
Collateral Agent on any number of occasions.

         2.3. WAIVERS WITH RESPECT TO OBLIGATIONS. Except to the extent
expressly required by the Exchange Agreement or any other Credit Document, the
Guarantor waives, to the fullest extent permitted by the provisions of
applicable law, all of the following (including all defenses, counterclaims and
other rights of any nature based upon any of the following):

                  (a) presentment, demand for payment and protest of nonpayment
         of any of the Obligations, and notice of protest, dishonor or
         nonperformance;

                  (b) notice of acceptance of this guarantee and notice that
         credit has been extended in reliance on the Guarantor's guarantee of
         the Obligations;

                  (c) notice of any Event of Default or of any inability to
         enforce performance of the obligations of the Borrower or any other
         Person with respect to any Credit Document or notice of any
         acceleration of maturity of any Obligations;

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                  (d) demand for performance or observance of, and any
         enforcement of any provision of the Exchange Agreement, the Obligations
         or any other Credit Document or any pursuit or exhaustion of rights or
         remedies with respect to any Credit Security or against the Borrower or
         any other Person in respect of the Obligations or any requirement of
         diligence or promptness on the part of the Collateral Agent or the
         Holders in connection with any of the foregoing;

                  (e) any act or omission on the part of the Collateral Agent or
         the Holders which may impair or prejudice the rights of the Guarantor,
         including rights to obtain subrogation, exoneration, contribution,
         indemnification or any other reimbursement from the Borrower or any
         other Person, or otherwise operate as a deemed release or discharge;

                  (f) failure or delay to perfect or continue the perfection of
         any security interest in any Credit Security or any other action which
         harms or impairs the value of, or any failure to preserve or protect
         the value of, any Credit Security;

                  (g) any statute of limitations or any statute or rule of law
         which provides that the obligation of a surety must be neither larger
         in amount nor in other respects more burdensome than the obligation of
         the principal;

                  (h) any "single action" or "anti-deficiency" law which would
         otherwise prevent the Holders from bringing any action, including any
         claim for a deficiency, against the Guarantor before or after the
         Collateral Agent's or the Holders' commencement or completion of any
         foreclosure action, whether judicially, by exercise of power of sale or
         otherwise, or any other law which would otherwise require any election
         of remedies by the Collateral Agent or the Holders;

                  (i) all demands and notices of every kind with respect to the
         foregoing; and

                  (j) to the extent not referred to above, all defenses (other
         than payment) which the Borrower may now or hereafter have to the
         payment of the Obligations, together with all suretyship defenses,
         which could otherwise be asserted by the Guarantor.

Each Guarantor represents that it has obtained the advice of counsel as to the
extent to which suretyship and other defenses may be available to it with
respect to its obligations hereunder in the absence of the waivers contained in
this Section 2.3.

         No delay or omission on the part of the Collateral Agent or the Holders
in exercising any right under any other Credit Document or under any other
guarantee of the Obligations or with respect to the Credit Security shall
operate as a waiver or relinquishment of such right. Absent gross negligence or
willful misconduct on the Collateral Agent's or Holders' part, no action which
the Collateral Agent or the Holders or the Borrower or any other Obligor may
take or refrain from taking with respect to the Obligations shall affect the
provisions of this Agreement or the obligations of the Guarantor hereunder. None
of the Holders' or the Collateral Agent's

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rights shall at any time in any way be prejudiced or impaired by any act or
failure to act on the part of the Borrower or any other Obligor, or by any
noncompliance by the Borrower or any other Obligor with any Credit Document,
regardless of any knowledge thereof which the Collateral Agent or the Holders
may have or otherwise be charged with.

         2.4. HOLDERS' POWER TO WAIVE, ETC. The Guarantor grants to the
Collateral Agent and the Holders full power in their discretion, without notice
to or consent of the Guarantor, such notice and consent being expressly waived
to the fullest extent permitted by applicable law, and without in any way
affecting the liability of the Guarantor under its guarantee hereunder:

                  (a) To waive compliance with, and any Default under, and to
         consent to any amendment to or modification or termination of any
         provision of, or to give any waiver in respect of, the Exchange
         Agreement, any other Credit Document, the Credit Security, the
         Obligations or any guarantee thereof (each as from time to time in
         effect);

                  (b) To grant any extensions of the Obligations (for any
         duration), and any other indulgence with respect thereto, and to effect
         any total or partial release (by operation of law or otherwise),
         discharge, compromise or settlement with respect to the obligations of
         the Obligors or any other Person in respect of the Obligations, whether
         or not rights against the Guarantor under this Agreement are reserved
         in connection therewith;

                  (c) To take security in any form for the Obligations, and to
         consent to the addition to or the substitution, exchange, release or
         other disposition of, or to deal in any other manner with, any part of
         any property contained in the Credit Security whether or not the
         property, if any, received upon the exercise of such power shall be of
         a character or value the same as or different from the character or
         value of any property disposed of, and to obtain or release any present
         or future guarantees of the Obligations and to proceed against any of
         the Credit Security or such guarantees in any order;

                  (d) To collect or liquidate or realize upon any of the
         Obligations or the Credit Security in a commercially reasonable manner
         or to refrain from collecting or liquidating or realizing upon any of
         the Obligations or the Credit Security; and

                  (e) To extend credit under the Exchange Agreement, any other
         Credit Document or otherwise in such amount as the Holders may
         determine, including increasing the amount of credit and the interest
         rate and fees with respect thereto, even though the condition of the
         Obligors (financial or otherwise, on an individual or Consolidated
         basis) may have deteriorated since the date hereof.

         2.5. INFORMATION REGARDING THE BORROWER, ETC. The Guarantor has made
such investigation as it deems desirable of the risks undertaken by them in
entering into this Agreement and are fully satisfied that it understands all
such risks. The Guarantor waives any obligation which may now or hereafter exist
on the part of the Collateral Agent or the Holders to inform it of the risks
being undertaken by entering into this Agreement or of any changes in such

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risks and, from and after the date hereof, the Guarantor undertakes to keep
themselves informed of such risks and any changes therein. The Guarantor
expressly waives any duty which may now or hereafter exist on the part of the
Collateral Agent or the Holders to disclose to such Guarantor any matter related
to the business, operations, character, collateral, credit, condition (financial
or otherwise), income or prospects of the Borrower and its Affiliates or their
properties or management, whether now or hereafter known by the Collateral Agent
or the Holders. The Guarantor represents, warrants and agrees that it assumes
sole responsibility for obtaining from the Borrower all information concerning
the Exchange Agreement and all other Credit Documents and all other information
as to the Borrower and its Affiliates or their properties or management as the
Guarantor deems necessary or desirable.

         2.6. CERTAIN GUARANTOR REPRESENTATIONS. Each Guarantor represents that:

                  (a) it is in its best interest and in pursuit of the purposes
         for which it was organized as an integral part of the business
         conducted and proposed to be conducted by the Borrower and its
         Subsidiaries, and reasonably necessary and convenient in connection
         with the conduct of the business conducted and proposed to be conducted
         by them, to induce the Symphony Funds to enter into the Exchange
         Agreement and to extend credit to the Guarantor by making the Guarantee
         contemplated by this Section 2;

                  (b) the credit available under the Exchange Agreement will
         directly or indirectly inure to its benefit;

                  (c) by virtue of the foregoing it is receiving at least
         reasonably equivalent value from the Symphony Funds for its Guarantee;

                  (d) it will not be rendered insolvent as a result of entering
         into this Agreement;

                  (e) after giving effect to the transactions contemplated by
         this Agreement, it will have assets having a fair saleable value in
         excess of the amount required to pay its probable liability on its
         existing debts as such debts become absolute and matured;

                  (f) it has, and will have, access to adequate capital for the
         conduct of its business;

                  (g) it has the ability to pay its debts from time to time
         incurred in connection therewith as such debts mature; and

                  (h) it has been advised by the Collateral Agent that the
         Symphony Funds are unwilling to enter into the Exchange Agreement
         unless the Guarantee contemplated by this Section 2 is given by it.

         2.7. SUBROGATION. The Guarantor agrees that, until the Obligations are
indefeasibly paid in full, it will not exercise any right of reimbursement,
subrogation, contribution, offset or

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other claims against the Borrower or any other Obligor arising by contract or
operation of law in connection with any payment made or required to be made by
the Guarantor under this Agreement. After the payment in full of the
Obligations, the Guarantor shall be entitled to exercise against the Borrower
and the other Obligors all such rights of reimbursement, subrogation,
contribution and offset, and all such other claims, to the fullest extent
permitted by law.

         2.8. SUBORDINATION. The Guarantor covenants and agrees that all
Indebtedness, claims and liabilities now or hereafter owing by the Borrower or
any other Obligor to the Guarantor whether arising hereunder or otherwise are
subordinated to the prior payment in full of the Obligations and are so
subordinated as a claim against such Obligor or any of its assets, whether such
claim be in the ordinary course of business or in the event of voluntary or
involuntary liquidation, dissolution, insolvency or bankruptcy, so that no
payment with respect to any such Indebtedness, claim or liability will be made
or received while any Event of Default exists.

         2.9. FUTURE SUBSIDIARIES; FURTHER ASSURANCES. The Guarantor will from
time to time cause (a) any present Wholly Owned Subsidiary that is not a
Guarantor within 30 days after notice from the Collateral Agent or (b) any
future Wholly Owned Subsidiary within 30 days after any such Person becomes a
Wholly Owned Subsidiary, to join this Agreement as a Guarantor pursuant to a
joinder agreement in form and substance satisfactory to the Collateral Agent;
PROVIDED, HOWEVER, that in the event such a Wholly Owned Subsidiary is
prohibited by any valid law, statute, rule or regulation from guaranteeing the
Obligations, or if such a guarantee by any foreign Subsidiary would result in a
repatriation of a material amount of foreign earnings under the Code (including
the "deemed dividend" provisions of section 956 of the Code), (i) such guarantee
will be limited to the extent necessary to comply with such prohibition or to
prevent such repatriation of foreign earnings or (ii) if such limitation on the
guaranteed amount is not sufficient to avoid such prohibition or repatriation,
the Borrower and its other Subsidiaries will pledge the stock of such Wholly
Owned Subsidiary (or as much of such stock as may be pledged without resulting
in such a repatriation) to the Collateral Agent to secure the Obligations
pursuant to a pledge agreement in form and substance satisfactory to the
Collateral Agent. The Guarantor will, promptly upon the request of the
Collateral Agent from time to time, execute, acknowledge and deliver, and file
and record, all such instruments, and take all such action, as the Collateral
Agent deems necessary or advisable to carry out the intent and purpose of this
Section 2.

3. REPRESENTATIONS AND WARRANTIES. In order to induce the Symphony Funds to
extend credit under the Exchange Agreement, the Guarantor represents and
warrants that:

         3.1. ORGANIZATION AND BUSINESS. The Guarantor is a duly organized and
validly existing corporation, in good standing under the laws of The
Commonwealth of Massachusetts, as applicable, with all power and authority,
corporate or otherwise, necessary (a) to enter into and perform this Agreement
and each other Credit Document to which it is a party and (b) to own its
properties and carry on the business now conducted or proposed to be conducted
by it.

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Certified copies of the Charter and By-laws of the Guarantor have been
previously delivered to the Collateral Agent and are correct and complete.

         3.2. AUTHORIZATION AND ENFORCEABILITY. The Guarantor has taken all
corporate action required to execute, deliver and perform this Agreement and
each other Credit Document to which it is a party. Each of this Agreement and
each other Credit Document to which the Guarantor is party constitutes the
legal, valid and binding obligation of the Guarantor, enforceable against the
Guarantor in accordance with its terms.

         3.3. NO LEGAL OBSTACLE TO AGREEMENTS. Neither the execution, delivery
and performance of this Agreement or any other Credit Document to which it is
party, nor the consummation of any transaction referred to in or contemplated by
this Agreement or any other Credit Document, has constituted or resulted, or
will constitute or result, in:

                  (a) Any breach or termination of the provisions of any
         agreement, instrument, deed or lease to which the Guarantor is a party
         or by which it is bound, or of the Charter or By-laws of the Guarantor;
         or

                  (b) The violation of any law, statute, judgment, decree or
         governmental order, rule or regulation applicable to the Guarantor.

No approval, authorization or other action by, or declaration to or filing with,
any governmental or administrative authority or any other Person is required to
be obtained or made by the Guarantor in connection with the execution, delivery
and performance of this Agreement or any other Credit Document to which it is
party or the transactions contemplated hereby or thereby.

         3.4. LITIGATION. Except as disclosed in the SEC Reports, no litigation,
at law or in equity, or any proceeding before any court, board or other
governmental or administrative agency or any arbitrator is pending or, to the
knowledge of the Guarantor, threatened which may involve any material risk of
any final judgment, order or liability which, after giving effect to any
applicable insurance, has resulted, or creates a material risk of resulting, in
any material adverse change in the Guarantor's business, assets, financial
condition, income or prospects or which seeks to enjoin the consummation, or
which questions the validity, of any of the transactions contemplated by this
Agreement or any other Credit Document. No judgment, decree or order of any
court, board or other governmental or administrative agency or any arbitrator
has been issued against or binds the Guarantor which has resulted, or creates a
material risk of resulting, in any material adverse change in the Guarantor's
business, assets, financial condition, income or prospects.

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<PAGE>

4. SUCCESSORS AND ASSIGNS. The provisions of this Agreement shall inure to the
benefit of the Holders and their successors and assigns and shall be binding
upon the Guarantor and its respective successors and assigns. The Guarantor may
not assign its rights or obligations under this Agreement without the written
consent of the Collateral Agent.

5. NOTICES. Any notice or other communication in connection with this Agreement
shall be deemed to be given if given in writing (including telex, telecopy or
similar teletransmission) addressed as provided below (or to the addressee at
such other address as the addressee shall have specified by notice actually
received by the addressor), and if either (a) actually delivered in fully
legible form to such address (evidenced in the case of a telex by receipt of the
correct answerback) or (b) in the case of a letter, five business days shall
have elapsed after the same shall have been deposited in the United States
mails, with first-class postage prepaid and registered or certified.

         If to the Guarantor, to it in care of iBasis, Inc., 20 Second Avenue,
Burlington, MA 01803, to the attention of its chief financial officer.

         If to the Collateral Agent, to it at its address specified in or
pursuant to section 13 of the Exchange Agreement.

6. REIMBURSEMENT OF EXPENSES. Subject to the terms of the Fee Letter (as such
term is defined in the Exchange Agreement) and the Exchange Agreement, the
Guarantor shall promptly pay on demand all reasonable expenses of the Collateral
Agent and the Holders (including reasonable attorney fees and expenses) in
connection with the preparation of this Agreement, operations hereunder and
enforcement and collection hereof, whether before or after bankruptcy or similar
proceedings (and whether or not allowed as a claim therein).

7. VENUE; SERVICE OF PROCESS. Each Guarantor:

                  (a) Irrevocably submits to the nonexclusive jurisdiction of
         the state courts of the Commonwealth of Massachusetts and to the
         nonexclusive jurisdiction of the United States District Court for the
         District of Massachusetts for the purpose of any suit, action or other
         proceeding arising out of or based upon this Agreement or any other
         Credit Document or the subject matter hereof or thereof;

                  (b) Waives to the extent not prohibited by applicable law, and
         agrees not to assert, by way of motion, as a defense or otherwise, in
         any such proceeding brought in any of the above-named courts, any claim
         that it is not subject personally to the jurisdiction of such court,
         that its property is exempt or immune from attachment or execution,
         that such proceeding is brought in an inconvenient forum, that the
         venue of any such proceeding is improper, or that this Agreement or any
         other Credit Document, or the subject matter hereof or thereof, may not
         be enforced in or by such court;

                  (c) Consents to service of process in any such proceeding in
         any manner permitted by law and agrees that service of process by
         registered or certified mail, return

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         receipt requested, at its address specified in or pursuant to Section 5
         is reasonably calculated to give actual notice; and

                  (d) Waives to the extent not prohibited by applicable law that
         cannot be waived any right it may have to claim or recover in any such
         proceeding any special, exemplary, punitive or consequential damages.

8. WAIVER OF JURY TRIAL. TO THE EXTENT NOT PROHIBITED BY APPLICABLE LAW WHICH
CANNOT BE WAIVED, EACH OF THE COLLATERAL AGENT AND EACH GUARANTOR WAIVES, AND
COVENANTS THAT IT WILL NOT ASSERT (WHETHER AS PLAINTIFF, DEFENDANT OR
OTHERWISE), ANY RIGHT TO TRIAL BY JURY IN ANY FORUM IN RESPECT OF ANY ISSUE,
CLAIM, DEMAND OR ACTION ARISING OUT OF OR BASED UPON THIS AGREEMENT, THE
SECURITIES EXCHANGE AGREEMENT OR ANY OTHER CREDIT DOCUMENT OR THE SUBJECT MATTER
HEREOF OR THEREOF OR ANY OBLIGATION OR IN ANY WAY CONNECTED WITH THE DEALINGS OF
THE COLLATERAL AGENT OR THE GUARANTOR IN CONNECTION WITH ANY OF THE ABOVE, IN
EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING AND WHETHER IN CONTRACT OR
TORT OR OTHERWISE. Each Guarantor and the Collateral Agent acknowledges that the
provisions of this Section constitute a material inducement upon which each
party has relied, is relying and will rely in entering into the Exchange
Agreement and any other Credit Document, and that it has reviewed the provisions
of this Section with its counsel. The Collateral Agent or the Guarantor may file
an original counterpart or a copy of this Section with any court as written
evidence of the consent of the Collateral Agent and the Guarantor to the waiver
of the right to trial by jury.

9. GENERAL. All covenants, agreements, representations and warranties made in
this Agreement or any other Credit Document or in certificates delivered
pursuant hereto or thereto shall be deemed to have been relied on by each
Symphony Fund, notwithstanding any investigation made by the Collateral Agent on
its behalf, and shall survive the execution and delivery to the Symphony Funds
and the Holders hereof and thereof. The invalidity or unenforceability of any
provision hereof shall not affect the validity or enforceability of any other
provision hereof, and any invalid or unenforceable provision shall be modified
so as to be enforced to the maximum extent of its validity or enforceability.
The headings in this Agreement are for convenience of reference only and shall
not limit, alter or otherwise affect the meaning hereof. This Agreement and the
other Credit Documents constitute the entire understanding of the parties with
respect to the subject matter hereof and thereof and supersede all prior and
current understandings and agreements, whether written or oral. This Agreement
is a Credit Document and may be executed in any number of counterparts, which
together shall constitute one instrument. This Agreement shall be governed by,
and shall be construed and enforced in accordance with, the laws of The
Commonwealth of Massachusetts, without regard to the principles of conflicts of
laws. Each beneficial holder of the Obligations shall be entitled to the
benefits of a Holder under this Agreement.

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         Each of the undersigned has caused this Agreement to be executed and
delivered by its duly authorized officer as an agreement under seal as of the
date first written above.

                               iBASIS SECURITIES CORPORATION

                               By /s/ Gordon VanderBrug
                                  ---------------------------------------------
                                  Title: Executive Vice President

                               U.S. BANK NATIONAL ASSOCIATION,
                               as Collateral Agent under the Exchange Agreement

                               By /s/ John A. Brennan
                                  ---------------------------------------------
                                  Title: Trust Officer

                                       10<Page>
                                                                   Exhibit 10.19

                                                                  EXECUTION COPY
                                                                  --------------

                                ESCROW AGREEMENT

     ESCROW AGREEMENT, dated as of November 26, 2002 (this "Escrow Agreement"),
by and among GetronicsWang Co. LLC, a limited liability company formed under the
laws of the State of Delaware ("Parent"), DigitalNet, Inc., a corporation formed
under laws of the State of Delaware ("Purchaser"), and State Street Bank and
Trust Company, a Massachusetts trust company, as Escrow Agent (the "Agent").

     This Escrow Agreement is being entered into pursuant to Section 2.4(c) of
the Purchase Agreement, dated as of September 27, 2002 (the "Agreement"), by and
among Parent, Getronics Government Solutions, L.L.C., a limited liability
company formed under the laws of the State of Delaware (the "Company"),
DigitalNet Holdings, Inc., a corporation formed under the laws of the State of
Delaware, and Purchaser. Capitalized terms used and not otherwise defined herein
shall have the respective meanings ascribed to them in the Agreement.
Notwithstanding the foregoing, the Agent shall have no responsibility with
regard to such terms defined with reference to the Agreement, and shall be
entitled to rely on the use of such terms in any communications received by it.

     NOW, THEREFORE, in consideration of the foregoing, the respective
representations, warranties, covenants and agreements set forth in the Agreement
(with respect to the Parent and Purchaser thereto only, and not the Agent) and
herein and other good and valuable consideration, the adequacy and receipt of
which are hereby acknowledged, and intending to be bound hereby, the parties
hereto hereby agree as follows:

                                    ARTICLE I

                                   ESCROW FUND

     1.1 ESTABLISHMENT OF ESCROW FUND. Simultaneously with the execution and
delivery of this Escrow Agreement and in accordance with Section 2.4(c) of the
Agreement, Parent is depositing with the Agent (a) $8,873,000 (which amount,
together with any additional amount deposited therein pursuant to the second
sentence of this Section 1.1, shall be referred herein to as the "Undisputed
Post-Closing CSOC Accounts Receivable Escrow Fund") as the source to satisfy
Parent's liability and obligation, if any, under Section 5.14(e)(iii) of the
Agreement and (b) $1,753,000 (which amount, together with any additional amount
deposited therein pursuant to the third sentence of this Section 1.1, shall be
referred herein to as the "Disputed Post-Closing CSOC Accounts Receivable Escrow
Fund") as the source to satisfy Parent's liability and obligation, if any, under
Section 5.14(e)(iv) of the Agreement. If, when the CSOC Closing Spreadsheet is
finalized pursuant to Section 5.14(c) of the Agreement, the Undisputed
Post-Closing CSOC Accounts Receivable Bogey is greater than the amount then in
the Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund, then not later
than the fifth Business Day after the date

<Page>

the CSOC Closing Spreadsheet is finalized pursuant to Section 5.14(c) of the
Agreement Parent shall deposit in the Undisputed Post-Closing CSOC Accounts
Receivable Escrow Fund an amount equal to the difference between the amount then
in the Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund and the
Undisputed Post-Closing CSOC Accounts Receivable Bogey. For purposes of this
Escrow Agreement, the term "Business Day" shall mean any day on which the Agent
is open for business at its offices in Boston, Massachusetts. If, when the CSOC
Closing Spreadsheet is finalized pursuant to Section 5.14(c) of the Agreement,
the Disputed Post-Closing CSOC Accounts Receivable Bogey is greater than the
amount then in the Disputed Post-Closing CSOC Accounts Receivable Escrow Fund,
then not later than the fifth Business Day after the date the CSOC Closing
Spreadsheet is finalized pursuant to Section 5.14(c) of the Agreement Parent
shall deposit in the Disputed Post-Closing CSOC Accounts Receivable Escrow Fund
an amount equal to the difference between the amount then in the Disputed
Post-Closing CSOC Accounts Receivable Escrow Fund and the Disputed Post-Closing
CSOC Accounts Receivable Bogey. The Undisputed Post-Closing CSOC Accounts
Receivable Escrow Fund and the Disputed Post-Closing CSOC Accounts Receivable
Escrow Fund, together with any interest or other income earned thereon until
such interest or other income is paid to Parent pursuant to Section 2.4, are
sometimes referred to herein collectively as the "Escrow Fund." The Agent shall
hold the Escrow Fund in escrow, and release and pay the Escrow Fund, in
accordance with this Escrow Agreement.

     1.2 RELEASE OF UNDISPUTED POST-CLOSING CSOC ACCOUNTS RECEIVABLE ESCROW
FUND.

         (a) The Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund,
or applicable portion thereof, shall be released only as follows:

             (i) if, when the CSOC Closing Spreadsheet is finalized pursuant to
Section 5.14(c) of the Agreement, the Undisputed Post-Closing CSOC Accounts
Receivable Bogey is less than the amount then in the Undisputed Post-Closing
CSOC Accounts Receivable Escrow Fund, then an amount equal to the difference
between the amount then in the Undisputed Post-Closing CSOC Accounts Receivable
Escrow Fund and the Undisputed Post-Closing CSOC Accounts Receivable Bogey shall
be released from the Undisputed Post-Closing CSOC Accounts Receivable Escrow
Fund to Parent;

             (ii) if for any reason whatsoever the Company is relieved of all or
any part of its obligations under, or in any way related to, services performed
or products supplied under the CSOC Customer Contract giving rise to Undisputed
Post-Closing CSOC Accounts Receivable, then an amount equal to the amount of the
cost savings, plus any margin associated therewith, directly or indirectly
resulting from the Company having been so relieved of all or any part of its
obligations under, or in any way related to, services performed or products
supplied under the CSOC Customer Contract giving rise to Undisputed Post-Closing
CSOC Accounts Receivable shall be released from the Undisputed Post-Closing CSOC
Accounts Receivable Escrow Fund to Parent;

                                       2
<Page>

             (iii) if the CSOC Customer Contract is amended without Parent's
prior written consent under Section 5.14(f) of the Agreement, or the CSOC Action
is settled or compromised or the Company consents to the entry of any judgment
in the CSOC Action, in each case, without Parent's prior written consent under
Section 5.14(g)(i) of the Agreement, then the entire then balance of the
Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund shall be released
to Parent;

             (iv) if the Company retains any CSOC Payments pursuant to
Section 5.14(e)(ii)(bb) of the Agreement, then an amount equal to the amount of
the CSOC Payments so retained by the Company shall be released from the
Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund to Parent;

             (v) if the Company retains an aggregate amount of CSOC Payments
pursuant to Section 5.14(e)(ii)(bb) of the Agreement equal to or greater than
the Undisputed Post-Closing CSOC Accounts Receivable Bogey, then the entire then
balance of the Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund
shall be released to Parent; or

             (vi) if the Company retains an aggregate amount of CSOC Payments
pursuant to Section 5.14(e)(ii)(bb) of the Agreement less than the Undisputed
Post-Closing CSOC Accounts Receivable Bogey, then (aa) first, an amount equal to
the difference between the aggregate amount of CSOC Payments retained by the
Company pursuant to Section 5.14(e)(ii)(bb) of the Agreement and the Undisputed
Post-Closing CSOC Accounts Receivable Bogey shall be released from the
Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund to Purchaser and
(bb) second, the entire then balance of the Undisputed Post-Closing CSOC
Accounts Receivable Escrow Fund shall be released to Parent.

         (b) On not later than the fifth Business Day after:

             (i) in the case of Section 1.2(a)(i), the date on which the CSOC
Closing Spreadsheet is finalized pursuant to Section 5.14(c) of the Agreement if
the Undisputed Post-Closing CSOC Accounts Receivable Bogey is less than the
amount then in the Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund;

             (ii) in the case of Section 1.2(a)(ii), any date on which the
Company is relieved of all or any part of its obligations under, or in any way
related to, services performed or products supplied under the CSOC Customer
Contract giving rise to Undisputed Post-Closing CSOC Accounts Receivable;

             (iii) in the case of 1.2(a)(iii), the date on which the CSOC
Customer Contract is amended, the CSOC Action is settled or compromised or the
Company consents to the entry of any judgment in the CSOC Action, whichever, if
any, first occurs;

                                       3
<Page>

             (iv) in the case of Section 1.2(a)(iv), any date on which the
Company delivers to Parent a Postclosing CSOC Spreadsheet pursuant to Section
5.14(d) of the Agreement reflecting that the Company has retained any CSOC
Payments pursuant to Section 5.14(e)(ii)(bb) of the Agreement;

             (v) in the case of Section 1.2(a)(v), the date on which the Company
delivers to Parent a Postclosing CSOC Spreadsheet pursuant to Section 5.14(d) of
the Agreement reflecting that the Company has retained an aggregate amount of
CSOC Payments pursuant to Section 5.14(e)(ii)(bb) of the Agreement equal to or
greater than the Undisputed Post-Closing CSOC Accounts Receivable Bogey; or

             (vi) in the case of Section 1.2(a)(vi), the date on which the
Company shall have exhausted all commercially reasonable efforts to collect an
amount of Undisputed Post-Closing CSOC Accounts Receivable at least equal to the
Undisputed Post-Closing CSOC Accounts Receivable Bogey if notwithstanding such
efforts the Company has then retained an aggregate amount of CSOC Payments
pursuant to Section 5.14(e)(ii)(bb) of the Agreement less than the Undisputed
Post-Closing CSOC Accounts Receivable Bogey;

Parent and Purchaser shall give the Agent notice thereof by a Mutual Notice of
Instruction substantially in the form of Exhibit A hereto.

         (c) On not later than the fifth Business Day following receipt of a
Mutual Notice of Instruction substantially in the form of Exhibit A hereto
signed by Parent and Purchaser, the Agent shall release the Undisputed
Post-Closing CSOC Accounts Receivable Escrow Fund, or applicable portion thereof
and to the extent available, in accordance therewith.

     1.3 RELEASE OF DISPUTED POST-CLOSING CSOC ACCOUNTS RECEIVABLE ESCROW FUND.

         (a) The Disputed Post-Closing CSOC Accounts Receivable Escrow Fund, or
applicable portion thereof, shall be released only as follows:

             (i) if, when the CSOC Closing Spreadsheet is finalized pursuant to
Section 5.14(c) of the Agreement, the Disputed Post-Closing CSOC Accounts
Receivable Bogey is less than the amount then in the Disputed Post-Closing CSOC
Accounts Receivable Escrow Fund, then an amount equal to the difference between
the amount then in the Disputed Post-Closing CSOC Accounts Receivable Escrow
Fund and the Disputed Post-Closing CSOC Accounts Receivable Bogey shall be
released from the Disputed Post-Closing CSOC Accounts Receivable Escrow Fund to
Parent;

             (ii) if for any reason whatsoever the Company is relieved of all or
any part of its obligations under, or in any way related to, services performed
or products supplied under the CSOC Customer Contract giving rise to Disputed
Post-Closing CSOC Accounts Receivable, then an amount equal to the amount of the
cost savings, plus any margin associated therewith, directly or

                                       4
<Page>

indirectly resulting from the Company having been so relieved of all or any part
of its obligations under, or in any way related to, services performed or
products supplied under the CSOC Customer Contract giving rise to Disputed
Post-Closing CSOC Accounts Receivable shall be released from the Disputed
Post-Closing CSOC Accounts Receivable Escrow Fund to Parent;

             (iii) if the CSOC Customer Contract is amended without Parent's
prior written consent under Section 5.14(f) of the Agreement, or the CSOC Action
is settled or compromised or the Company consents to the entry of any judgment
in the CSOC Action, in each case, without Parent's prior written consent under
Section 5.14(g)(i) of the Agreement, then the entire then balance of the
Disputed Post-Closing CSOC Accounts Receivable Escrow Fund shall be released to
Parent;

             (iv) if the Company retains any CSOC Payments pursuant to
Section 5.14(e)(ii)(dd) of the Agreement, then an amount equal to the amount of
the CSOC Payments so retained by the Company shall be released from the Disputed
Post-Closing CSOC Accounts Receivable Escrow Fund to Parent;

             (v) if the Company retains an aggregate amount of CSOC Payments
pursuant to Section 5.14(e)(ii)(dd) of the Agreement equal to or greater than
the Disputed Post-Closing CSOC Accounts Receivable Bogey, then the entire then
balance of the Disputed Post-Closing CSOC Accounts Receivable Escrow Fund shall
be released to Parent; or

             (vi) if the Company retains an aggregate amount of CSOC Payments
pursuant to Section 5.14(e)(ii)(dd) of the Agreement less than the Disputed
Post-Closing CSOC Accounts Receivable Bogey, then (aa) first, an amount equal to
the difference between the aggregate amount of CSOC Payments retained by the
Company pursuant to Section 5.14(e)(ii)(dd) of the Agreement and the Disputed
Post-Closing CSOC Accounts Receivable Bogey shall be released from the Disputed
Post-Closing CSOC Accounts Receivable Escrow Fund to Purchaser and (bb) second,
the entire then balance of the Disputed Post-Closing CSOC Accounts Receivable
Escrow Fund shall be released to Parent.

         (b) On not later than the fifth Business Day after:

             (i) in the case of Section 1.3(a)(i), the date on which the CSOC
Closing Spreadsheet is finalized pursuant to Section 5.14(c) of the Agreement if
the Disputed Post-Closing CSOC Accounts Receivable Bogey is less than the amount
then in the Disputed Post-Closing CSOC Accounts Receivable Escrow Fund;

             (ii) in the case of Section 1.3(a)(ii), any date on which the
Company is relieved of all or any part of its obligations under, or in any way
related to, services performed or products supplied under the CSOC Customer
Contract giving rise to Disputed Post-Closing CSOC Accounts Receivable;

                                       5
<Page>

             (iii) in the case of 1.3(a)(iii), the date on which the CSOC
Customer Contract is amended, the CSOC Action is settled or compromised or the
Company consents to the entry of any judgment in the CSOC Action, whichever, if
any, first occurs;

             (iv) in the case of Section 1.3(a)(iv), any date on which the
Company delivers to Parent a Postclosing CSOC Spreadsheet pursuant to Section
5.14(d) of the Agreement reflecting that the Company has retained any CSOC
Payments pursuant to Section 5.14(e)(ii)(dd) of the Agreement;

             (v) in the case of Section 1.3(a)(v), the date on which the Company
delivers to Parent a Postclosing CSOC Spreadsheet pursuant to Section 5.14(d) of
the Agreement reflecting that the Company has retained an aggregate amount of
CSOC Payments pursuant to Section 5.14(e)(ii)(dd) of the Agreement equal to or
greater than the Disputed Post-Closing CSOC Accounts Receivable Bogey; or

             (vi) in the case of Section 1.3(a)(vi), the date on which the
Company shall have exhausted all commercially reasonable efforts to collect an
amount of Disputed Post-Closing CSOC Accounts Receivable at least equal to the
Disputed Post-Closing CSOC Accounts Receivable Bogey if notwithstanding such
efforts the Company has then retained an aggregate amount of CSOC Payments
pursuant to Section 5.14(e)(ii)(dd) of the Agreement less than the Disputed
Post-Closing CSOC Accounts Receivable Bogey;

Parent and Purchaser shall give the Agent notice thereof by a Mutual Notice of
Instruction substantially in the form of Exhibit B hereto.

         (c) On not later than the fifth Business Day following receipt of a
Mutual Notice of Instruction substantially in the form of Exhibit B hereto
signed by Parent and Purchaser, the Agent shall release the Disputed
Post-Closing CSOC Accounts Receivable Escrow Fund, or applicable portion thereof
and to the extent available, in accordance therewith.

                                   ARTICLE II

                               GENERAL PROVISIONS

     2.1 TERM OF AGREEMENT. This Escrow Agreement shall be in effect until the
entire amount of the Escrow Fund is distributed in accordance with Sections 1.2
and 1.3.

     2.2 EXPENSES OF THE AGENT. The Agent shall be entitled to compensation for
its services hereunder in accordance with Exhibit C attached hereto and subject
to change on an annual basis in accordance with the Agent's ordinary course of
business, and shall be reimbursed for all reasonable expenses (including
attorneys' fees), disbursements and advancements incurred or made by it in
performance of its services hereunder, which will be paid by one-half by
Purchaser and one-half by Parent, provided that it shall be a condition
precedent to this Agreement that all fees (to the extent then due to the Escrow

                             6

<Page>

Agent) be paid to the Escrow Agent on or prior to the Closing. Parent and
Purchaser agree, severally, to reimburse the Agent on demand for all reasonable
and necessary costs and expenses incurred in connection with the administration
of this Escrow Agreement or the escrow created hereby or the performance or
observance of its duties hereunder which are in excess of its compensation for
normal services hereunder, including without limitation, payment of any legal
fees and expenses incurred by the Agent in connection with resolution of any
claim by any party hereunder.

     2.3 TAXES ON ESCROW FUND. Parent shall bear all federal, state and local
taxes based upon or measured by net or gross income arising from the Escrow Fund
and shall provide the Agent with sufficient information (including but not
limited to Parent's Form W-9) so that the Agent can comply with reporting
obligations imposed under any laws relating to such taxes. Parent understands
that, in the event it fails to provide the Agent with such information, the
Internal Revenue Code, as amended from time to time, may require the Agent to
withhold funds otherwise distributable to Parent. The Parent agrees (i) to
assume any and all obligations imposed now or hereafter by any applicable tax
law with respect to any payment or distribution of the Escrow Fund or
performance of other activities under this Escrow Agreement, (ii) to instruct
the Agent in writing with respect to the Agent's responsibility for withholding
and other taxes, assessments or other governmental charges, and to instruct the
Agent with respect to any certifications and governmental reporting that may be
required under any laws or regulations that may be applicable in connection with
its acting as Agent under this Escrow Agreement, and (iii) except for any
liability or obligation that results from the gross negligence, bad faith or
willful misconduct of the Agent, to indemnify and hold the Agent harmless from
any liability or obligation on account of taxes (other than income taxes of
Agent), assessments, additions for late payment, interest, penalties, expenses
and other governmental charges that may be assessed or asserted against the
Agent in connection with, on account of or relating to the Escrow Fund, the
management established hereby, any payment or distribution of or from the Escrow
Fund pursuant to the terms hereof or other activities performed under the terms
of this Escrow Agreement, including without limitation any liability for the
withholding or deduction of (or the failure to withhold or deduct) the same, and
any liability for failure to obtain proper certifications or to report properly
to governmental authorities in connection with this Escrow Agreement, including
costs and expenses (including reasonable legal fees and expenses), interest and
penalties. The foregoing indemnification and agreement to hold harmless shall
survive the termination of this Escrow Agreement.

     2.4 INVESTMENT OF ESCROW FUND. The Escrow Fund shall be invested by the
Agent as directed in writing by the Parent and Purchaser in short-term
obligations of the U.S. government or in certificates of deposit issued by a
bank or trust company having combined capital and surplus of at least
$500,000,000 or in such other manner as the Parent and Purchaser hereto may
agree and direct in writing. The Agent shall pay all interest or other income
earned on the Escrow Fund over to Parent not later than the fifth Business Day
after the end of the month in which such interest or other income is received by
the Agent. All earnings received from the investment of the Escrow Fund shall be
credited to, and shall become a part of, the Escrow Fund (and any losses on such
investments shall be debited from the Escrow Fund). The Agent shall not be
responsible

                                       7
<Page>

for any investment losses, including without limitation any market loss on any
investment liquidated prior to maturity in order to make a payment required
hereunder, except any loss resulting from its gross negligence, bad faith or
willful misconduct.

     2.5 THE AGENT. The obligations of the Agent under this Agreement are
subject to the following terms and conditions:

         (a) The Agent is not a party to and is not bound by any agreement
(including, but not limited to the Agreement) other than this Escrow Agreement;

         (b) The Agent acts hereunder as a depository only and is not
responsible for or liable in any manner whatsoever for the sufficiency,
correctness, genuineness or validity of any funds, shares, documents or other
materials deposited with it. Parent and Purchaser agree to and hereby do waive
any suit, claim, demand or cause of action of any kind which they may have or
may assert against the Agent arising out of or relating to the execution or
performance by the Agent of this Escrow Agreement, unless such suit, claim,
demand or cause of action is based upon the willful misconduct, gross negligence
or bad faith of the Agent. Parent and Purchaser agree to indemnify the Agent
against and from any and all claims, demands, costs, liabilities and expenses,
including counsel fees, which may be asserted against it or to which it may be
exposed or which it may incur by reason of its execution or performance of this
Escrow Agreement unless arising from the Agent's willful misconduct, gross
negligence or bad faith. The Agent may defend any legal proceeding which may be
instituted against it with respect to the subject matter of this Escrow
Agreement but shall not be required to unless it is requested to do so by the
Parent or Purchaser and is indemnified by such requesting party to the Agent's
satisfaction against the cost and expenses (including reasonable attorney's
fees) of such defense, unless arising from the Agent's willful misconduct, gross
negligence or bad faith. The Agent shall not be required to institute legal
proceedings of any kind. The Agent shall not be required to perform any acts
which violate any law or applicable rules of any governmental agency;

         (c) The Agent shall not have any responsibility for the genuineness or
validity of any notice, evidence or other document or item delivered to it, and
the Agent shall be entitled to rely upon and shall be protected in acting upon
any written notice, waiver, consent, receipt or other evidence or paper document
which the Agent reasonably believes to be genuine and to be signed by the proper
person;

         (d) The Agent shall not be liable for any error of judgment or for any
acts done or steps taken or omitted or admitted by it or for any mistake of
facts or law or for anything which the Agent may do or refrain from doing in
connection herewith except for the Agent's own willful misconduct, gross
negligence or bad faith; and

         (e) As to any legal questions arising in connection with the
administration of this Agreement, the Agent may rely absolutely upon the
opinions given to it by its counsel and shall be free of liability for acting in
reliance on such opinions.

         (f) The Agent shall have no more or less responsibility or liability on
account of any action or omission of any book-entry depository, securities
intermediary or

                                       8
<Page>

other subescrow agent employed by the Agent than any such book-entry depository,
securities intermediary or other subescrow agent has to the Agent, except to the
extent that such action or omission of any book-entry depository, securities
intermediary or other subescrow agent was caused by the Agent's own gross
negligence, bad faith or willful misconduct in breach of this Escrow Agreement.

         (g) The Agent is hereby authorized, in making or disposing of any
investment permitted by this Escrow Agreement, to deal (on terms no less
favorable than could be obtained on an arms length basis with a third party)
with itself (in its individual capacity) or with any one or more of its
affiliates, whether it or such affiliate is acting as a subagent of the Agent or
for any third person or dealing as principal for its own account.

         (h) Notwithstanding any term appearing in this Escrow Agreement to the
contrary, in no instance shall the Agent be required or obligated to distribute
any Escrow Funds (or take other action that may be called for hereunder to be
taken by the Agent) sooner than two (2) Business Days after (i) it has received
the applicable documents required under this Escrow Agreement in good form, or
(ii) passage of the applicable time period (or both, as applicable under the
terms of this Escrow Agreement), as the case may be.

     2.6 RESIGNATION OR REMOVAL OF AGENT. Parent and Purchaser may, by mutual
agreement at any time, remove the Agent as agent hereunder, and substitute
another therefore. In such event the Agent shall, upon receipt of written notice
of such removal, account for and deliver to such substituted escrow agent the
Escrow Fund and the Agent shall thereafter be discharged of all liability
hereunder. The Agent may at any time resign as Agent hereunder by giving thirty
(30) days' prior written notice of resignation to Parent and Purchaser. Prior to
the effective date of the resignation as specified in such notice, Parent and
Purchaser will issue to the Agent a written instruction authorizing redelivery
of the Escrow Funds to a bank or trust company that they select as successor to
the Agent hereunder. If, however, Parent and Purchaser shall fail to name such a
successor escrow agent within twenty (20) days after the notice of resignation
from the Agent, the Parent shall be entitled to name such successor escrow agent
who shall be reputable and nationally recognized. If no successor escrow agent
is named pursuant to the immediately preceding two sentences, the Agent may
apply to a court of competent jurisdiction for appointment of a successor escrow
agent.

     2.7 AMENDMENT AND MODIFICATION. This Escrow Agreement may be amended,
modified and supplemented only by written agreement of Parent, Purchaser and the
Agent.

     2.8 WAIVER OF COMPLIANCE. Except as otherwise provided in this Escrow
Agreement, any failure of any of the parties to comply with any obligation,
covenant, agreement or condition herein may be waived by the party or parties
entitled to the benefits thereof only by a written instrument signed by the
party granting such waiver, but such waiver or failure to insist upon strict
compliance with such obligation, covenant, agreement or condition shall not
operate as a waiver of, or estoppel with respect to, any subsequent or other
failure.

     2.9 WAIVER OF SET-OFF RIGHTS. The Agent hereby absolutely and irrevocably
waives any and all rights it may have, under applicable laws or otherwise, and
agrees that

                                       9
<Page>

it shall not exercise or assert any right (a) to set-off and appropriate and
apply any amount of the Escrow Fund against or on account of any obligations or
liabilities whatsoever of Parent or Purchaser or any Subsidiary of Parent or
Purchaser owing (or to become due to, whether contingent or otherwise) to it or
any claims of any nature it may have against Parent or Purchaser or any
subsidiary of Parent or Purchaser or (b) to establish, create, maintain,
perfect, enforce and foreclose on any lien, security interest or any other
encumbrance whatsoever (collectively, "Liens"), including, without limitation,
banker's liens and any other Liens arising by statute, operation of law or
otherwise, on, against or in respect of any of the Escrow Fund.

     2.10 NOTICES AND WIRING INSTRUCTIONS.

         (a) Any notice, request, instruction or other document to be given
hereunder by any party to another party shall be in writing and shall be deemed
given when delivered personally, upon receipt of a transmission confirmation
(with a confirming copy sent by overnight courier) if sent by facsimile or like
transmission and on the next Business Day when sent by Federal Express, United
Parcel Service, Express Mail, or other reputable overnight courier, as follows:

         If to Parent, to:

                 GetronicsWang Co. LLC
                 290 Concord Road
                 Billerica, Massachusetts 01821
                 Attention:  Steven Boyce, Vice President and
                   General Counsel, North America
                 (978) 625-3010 (telephone)
                 (978) 625-4213 (facsimile)

                 with a copy to:

                 Skadden, Arps, Slate, Meagher & Flom LLP
                 One Beacon Street
                 Boston, MA  02108
                 Attention:  David T. Brewster, Esq.
                 (617) 573-4800 (telephone)
                 (617) 573-4822 (facsimile)

                                       10
<Page>

         If to Purchaser, to:

                 DigitalNet, Inc.
                 6700-A Rockledge Drive
                 Suite 525
                 Bethesda, MD 20817
                 Attn:  Jack Pearlstein
                 (301) 530-2464 (telephone)
                 (301) 530-5023 (facsimile)

                 and:

                 GTCR Golder Rauner, LLC
                 6100 Sears Tower
                 Chicago, IL 60606-6402
                 Attn: Philip Canfield and Craig Bondy
                 (312) 382-2200 (telephone)
                 (312) 575-3211 (facsimile)

                 with a copy to:

                 Kirkland & Ellis
                 200 East Randolph Drive
                 Chicago, IL 60601
                 Attn:  Stephen L. Ritchie, Esq. and Martin A. DiLoreto, Esq.
                 (312) 861-2000 (telephone)
                 (312) 861-2200 (facsimile)

         If to the Agent, to:

                 State Street Bank and Trust Company
                 2 Avenue De Lafayette, 6th Floor
                 Boston, MA  02110
                 Attn:    Corporate Trust Department,
                          Virginia Jones,
                          Getronics/DigitalNet Escrow
                 (617) 662-1798 (telephone)
                 (617) 662-1463 (facsimile)

                 with a copy to:

                 Nixon Peabody LLP
                 101 Federal Street
                 Boston, MA  02110
                 Attn:    Jason G. Duncan
                 (617) 345-1205 (telephone)
                 (617) 345-1300 (facsimile)

                                       11
<Page>

         (b) WIRING INSTRUCTIONS. Any funds to be paid to or by the Agent
hereunder shall be sent by wire transfer pursuant to the following instructions
(or by such method of payment and pursuant to such instruction as may have been
given in advance and in writing to the Agent in accordance with Section 2.10(a)
above):

         If to Parent:

                 Bank: Fleet Bank
                       100 Federal Street
                       Boston, MA  02110
                 ABA #: 011-000-138
                 Acct. #: 936-356-4615
                 Ref: GetronicsWang Co. LLC

         If to Purchaser:

                 Bank: JP Morgan Chase
                       T&I Private Bank Division
                 ABA #: 021000021
                 Acct. #: 0999-99-651
                 Further Credit to: Q 191145004 for DigitalNet, Inc.
                 Ref: Getronics Escrow

         If to the Agent:

                 Bank: State Street Bank and Trust Company
                 ABA #: 0110 0002 8
                 Acct. #: 9903-990-1
                 Attn: Corporate Trust
                 Ref: Getronics/DigitalNet Escrow Account No. 131796-010

or to such other persons or addresses as may be designated in writing by the
party to receive such notice. Nothing in this section shall be deemed to
constitute consent to the manner and address for service of process in
connection with any legal proceeding, which service shall be effected as
required by applicable law.

     2.11 ASSIGNMENT. This Escrow Agreement and all of the provisions hereof
shall be binding upon and inure to the benefit of the parties hereto and their
respective successors and permitted assigns, but neither this Escrow Agreement
nor any of the rights, interests or obligations hereunder shall be assigned by
any of the parties hereto without the prior written consent of the other
parties, except (a) by operation of law or (b) as otherwise permitted by in this
Section 2.11. Purchaser may assign any or all of its rights under this Escrow
Agreement to any of its lenders as collateral security without the consent of
any of the other parties hereto; PROVIDED, HOWEVER, that no such assignment
shall relieve

                                       12
<Page>

Purchaser of any of its obligations hereunder. Parent may assign any or all of
its rights under this Escrow Agreement to any of its Affiliates without the
consent of any of the other parties hereto; PROVIDED, HOWEVER, that no such
assignment shall relieve Parent of any of its obligations hereunder. If the
Agent consolidates, merges or converts into, or transfers all or substantially
all of its corporate trust business to another corporation or association
authorized to exercise fiduciary powers of the type contemplated hereby, the
successor corporation or association without any further act shall be the
successor Agent.

     2.12 GOVERNING LAW. This Escrow Agreement shall be governed by the laws of
the State of Delaware, without giving effect to the conflicts of law provisions
thereof. The invalidity or unenforceability of any provision of this Escrow
Agreement shall not affect the validity or enforceability of any other
provision.

     2.13 COUNTERPARTS. This Escrow Agreement may be executed simultaneously in
two or more counterparts, each of which shall be deemed to be an original, but
all of which together shall constitute one and the same instrument.

     2.14 REPRODUCTION OF DOCUMENTS. This Escrow Agreement and all documents
relating thereto, including without limitation, (a) consents, waivers and
modifications which may hereafter be executed, and (b) certificates and other
information previously or hereafter furnished, may be reproduced by any
photographic, photostatic, microfilm, optical disk, micro-card, miniature
photographic or other similar process. The parties agree that any such
reproduction shall be admissible in evidence as the original itself in any
judicial or administrative proceeding, whether or not the original is in
existence and whether or not such reproduction was made by a party in the
regular course of business, and that any enlargement, facsimile or further
reproduction of such reproduction shall likewise be admissible in evidence.

     2.15 FORCE MAJEURE. The Agent shall not be responsible for delays or
failures in performance resulting from acts beyond its control. Such acts shall
include but not be limited to (i) acts of God, riots, epidemics, governmental
regulations superimposed after the fact, terrorist attacks or earthquakes and
(ii) to the extent a loss, liability, damage, cost and expense is not caused by
the Agent's gross negligence, bad faith or willful misconduct, fire,
communication line failures, computer viruses, power failures, strikes, lockouts
acts of war or other disasters.

     2.16 DISPUTE RESOLUTION. It is understood and agreed that, should any
dispute arise with respect to the delivery, ownership, right of possession,
and/or disposition of the Escrow Fund, or should any claim be made upon the
Agent or the Escrow Fund by a third party, the Agent upon receipt of notice of
such dispute or claim is authorized and shall be entitled (at its sole option
and election) to retain in its possession without liability to anyone, all or
any of said Escrow Fund until such dispute shall have been settled either by the
mutual written agreement of the parties involved or by a final order, decree or
judgment of a court in the United States of America, the time for perfection of
an appeal of such order, decree or judgment having expired.

                                       13
<Page>

     IN WITNESS WHEREOF, the parties hereto have caused this Escrow Agreement to
be duly executed as of the day and year first above written.

                                       GETRONICSWANG CO. LLC

                                       By: /s/ William J. Clark
                                           --------------------------------
                                           Name: William J. Clark
                                           Title: Chief Financial Officer

                                       DIGITALNET, INC.

                                       By: /s/ Jack Pearlstein
                                           -------------------------------
                                           Name: Jack Pearlstein
                                           Title: CFO

                                       STATE STREET BANK AND
                                         TRUST COMPANY, as Escrow Agent

                                       By: /s/ Patrick F. Thebado
                                           -------------------------------
                                           Name: Patrick F. Thebado
                                           Title: Vice President

                                       14

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