Document:

<PAGE>
                                                                  EXHIBIT 10.28

                                                        AETNA CONTRACT NO. 6346

                                AMENDMENT NO. 1
                                       TO
                                MASTER AGREEMENT
                                    BETWEEN
                         AETNA LIFE INSURANCE COMPANY.
                                      AND
                              IBS INTERACTIVE INC.

This Amendment (the "Amendment") to the Master Agreement dated October 23rd,
1997 between Aetna Life Insurance Company ("Aetna") and IBS Interactive Inc.
("IBS") is made as of this 27th day of November, 2001, by and between DIGITAL
FUSION INC., ("SUPPLIER") as successor in interest and assignee to certain
assets of "IBS", located at 400 North Ashley Dr. STE 2600, Tampa FL, 33602 and
AETNA LIFE INSURANCE COMPANY ("AETNA"), a Connecticut corporation, with its
principle place of business located at 151 Farmington Avenue, Hartford, CT
06516 ("Aetna"). The following amendments are incorporated into and made a part
of the Agreement. All sections and paragraphs of the Agreement not hereby
amended shall remain in full force and effect. Capitalized terms not otherwise
herein defined shall have the meanings ascribed to them in the Agreement. In
case of a conflict, the terms of this Amendment will control and prevail over
those contained in the Agreement.

IN WITNESS WHEREOF, THIS AMENDMENT IS EXECUTED BY THE DULY AUTHORIZED
REPRESENTATIVES OF THE PARTIES.

DIGITAL FUSION INC.                     AETNA LIFE INSURANCE COMPANY

/s/ Roy E. Crippen                      /s/ Brian M. Dudzik
--------------------------------        ---------------------------------------
Signature                               Signature

Roy E. Crippen                          Brian M. Dudzik
--------------------------------        ---------------------------------------
Print Name                              Print Name

CEO                                     Commodity Specialist
--------------------------------        ---------------------------------------
Title                                   Title

12/14/01                                12/22/01
--------------------------------        ---------------------------------------
Date                                    Date

                                       1
<PAGE>

                                                        AETNA CONTRACT NO. 6346

                                AMENDMENT NO. 1
                                       TO
                                MASTER AGREEMENT
                                    BETWEEN
                          AETNA LIFE INSURANCE COMPANY
                                      AND
                              DIGITAL FUSION INC.

This amendment (the "Amendment") to the Master Agreement dated October 23rd,
2001 between Digital Fusion Inc. (the "Supplier") and Aetna Life Insurance
Company ("Aetna") (the "Agreement") is made as of this 27th day of November,
2001. The following amendments are incorporated into and made a part of the
Agreement. All sections and paragraphs of the Agreement not hereby amended
shall remain in full force and effect. Capitalized terms not otherwise herein
defined shall have the meanings ascribed to them in the Agreement. In case of a
conflict, the terms of this Amendment will control and prevail over those
contained in the Agreement.

NOW, THEREFORE, in consideration of the mutual promises contained herein, the
parties agree to amend the Agreement as follows:

THE LANGUAGE IN SECTION 3.02 IS HEREBY DELETED IN ITS ENTIRETY AND REPLACED
WITH THE FOLLOWING:

         Invoicing and Payment. Supplier shall submit itemized invoices of fees
         and accept payment for such fees electronically. Invoices must be
         submitted on a monthly basis or in accordance with the payment
         schedule set forth in the applicable Schedule. Each invoice shall
         include the purchase order number, Supplier Employee name, hourly rate
         (if applicable), dates of service and total number of hours billed.
         Payment terms are sixty (60) days calculated from the date the invoice
         was received. Aetna shall receive a discount of 1 1/2 percent (1.5%)
         for invoices paid within 15 days of receipt at our Accounts Payable
         Department (Hartford, CT). Invoices submitted six months after the
         Services were rendered shall be presumed to have been paid, and it
         shall become Supplier's burden to demonstrate otherwise. Invoices
         received one year or more after the date the Services were rendered
         shall be deemed null and void, and Aetna shall be relieved of its
         obligation to pay them. Failure by Aetna to make payments to Supplier
         that are reasonably disputed in writing shall not constitute a
         material breach of this Agreement. Aetna will pay each invoice that
         complies with this Section and is approved by the Aetna Project
         Manager (if any) unless Aetna has some reasonable basis for
         non-payment. Immediately upon Aetna or Supplier determining that Aetna
         is owed a credit of any kind, Supplier shall itemize each such credit
         on the next invoice. At Aetna's option, Aetna may request that
         Supplier submit a check to Aetna in an amount equal to any such credit
         within fifteen (15) days of Aetna's request to do so.

THE LANGUAGE IN EXHIBIT I YEAR 2002 IN SCHEDULE NO. 6 IS HEREBY DELETED IN ITS
ENTIRETY AND REPLACED WITH THE FOLLOWING:

<TABLE>
<CAPTION>
                                                                                       SITE           PROJECT
 RATES            LEVEL I          LEVEL II        LEVEL III         TEMPS          MANAGEMENT       MANAGEMENT

<S>            <C>              <C>              <C>             <C>                <C>             <C>
 Annual          $64,896.00       $86,528.00       $97,344.00          NA           $101,670.40     $146,794.75
 MONTHLY           5,408.00        $7,210.66        $8,112.00          NA             $8,472.54      $12,232.90
 HOURLY              $31.20           $41.60           $46.80         $56.16             $48.88          $70.57
OVERTIME             $46.80           $62.40           $70.20         $84.24             $73.32         $105.90
RETAINER             NA              None             None         $5,667.00             None           None
EXPENSES             Yes             None             None             Yes              Travel         Travel
               Dependent upon   Dependent upon     Dependent     Dependent upon     $101,670.40     $146,794.75
PERSONAL           usage.           usage.        upon usage.        usage.         plus travel     plus travel
                                                                                     expenses         expenses
</TABLE>

                                       2
<PAGE>

IN WITNESS WHEREOF, THIS AMENDMENT IS EXECUTED BY THE DULY AUTHORIZED
REPRESENTATIVES OF THE PARTIES.

DIGITAL FUSION INC.                    AETNA LIFE INSURANCE COMPANY

/s/ Roy E. Crippen                     /s/ Brian M. Dudzik
------------------------------         ----------------------------------------
Signature                              Signature

Roy E. Crippen                         Brian M. Dudzik
------------------------------         ----------------------------------------
Print Name                             Print Name

CEO                                    Commodity Specialist
------------------------------         ----------------------------------------
Title                                  Title

12/14/01                               12/22/01
------------------------------         ----------------------------------------
Date                                   Date

                                       3<PAGE>
                                                                  EXHIBIT 10.29

                        EMPLOYMENT TERMINATION AGREEMENT

         This agreement (the "Agreement") is made as of the 1st day of July
2001, between Nicholas R. Loglisci, Jr. ("Executive") and IBS, Interactive,
Inc., ("Company").

         BACKGROUND. Executive and Company desire to terminate their employment
relationship in an amicable manner pursuant to Section 3(f)(ii) of an
Employment, Non-competition, Development and Confidentiality Agreement between
the parties dated May 3, 1999 (the "Employment Agreement").

         The Employment Agreement provides Executive with certain benefits
following the termination of his employment relationship with Company and
prohibits Executive from engaging in any business competitive with Company.
Company agrees to waive enforcement of certain provisions of the Employment
Agreement, except the non-compete and confidentiality provisions. In exchange,
Executive agrees to relinquish certain claims that Executive may have against
Company and its officers, directors, employees, agents, and representatives,
and their successors in interest, and Company agrees to relinquish certain
claims that Company may have against Executive. Executive also agrees to assist
Company with certain outstanding business and legal matters.

         Executive understands and agrees that, by signing this Agreement,
Executive relinquishes (unconditionally and without reservation) any and all
rights Executive has to make a claim (including any statutory or constitutional
claim) against or to sue Company or Company's partners, directors, officers,
employees, or their successors in interest for any reason for any events
occurring on or before the Effective Date, as defined in Section 1 below.
Executive acknowledges that Company has advised Executive to consult counsel
prior to executing this Agreement and has agreed to reimburse Executive up to
$1,000 for his attorney's fees in so doing.

         THEREFORE, the parties agree as follows:

         1.       RESIGNATION AND TERMINATION. Executive hereby resigns as an
officer of Company, and the parties hereby terminate the Employment Agreement,
pursuant to Section 3(f)(ii) thereof effective as of close of business on the
date of this Agreement. The Executive will remain a non-executive officer
employee of the Company until (a) the date prior to the date that the Executive
is employed as a full time employee of another entity or (b) the sixth (6th)
month anniversary of the date of this Agreement, whichever is earlier (the
"Effective Date").

         2.       COMPANY PAYMENTS TO EXECUTIVE.

                  (a)      Company agrees to pay to Executive (or to
Executive's heirs in the event of his death) and Executive agrees to accept the
following benefits and other consideration in lieu of any right that Executive
may have to compensation, benefits, and similar items, including his rights
under Section 3(f)(i) of the Employment Agreement:

                           (i)      From the date of this Agreement through the
Effective Date, the Company shall pay Executive the sum of $10,000 per month,
or a pro-rata portion thereof, payable in twice-monthly installments of $5,000
each. Company shall make these payments on or about the 15th and the last day
of each month beginning the first month of this Agreement;

                           (ii)     In addition, 30 days after the Effective
Date, the Company shall make a one-time $10,000 payment to Executive.

                                       1
<PAGE>

                           (iii)    Company shall maintain, as provided by
current Company policy, Executive and his dependents on Company's health,
welfare, and insurance plans, including coverage for short- and long-term
disability, as described in Section 2 of the Employment Agreement until the
Effective Date, at which point Executive shall become eligible for standard
COBRA benefits at his own cost;

                           (iv)     Executive acknowledges that he has not
earned or been promised at this time any bonus for Company's 2001 fiscal year
or any other fiscal year;

                           (v)      Company shall transfer to Executive, free
of any liens or encumbrances, the personal computer used by Executive in his
employment with Company;

                           (vi)     Company shall pay to Executive 30 days
after the Effective Date the sum of $5,653.48 as payment in full for any
vacation pay owed to Executive Company shall also reimburse Executive for any
of his unpaid business expenses incurred prior to the Effective Date in
accordance with its usual expense reimbursement policies; and

                           (vii)    Executive shall retain any and all stock
options, warrants or other securities awarded to Executive by Company pursuant
to Company's Stock Option Plan or any other similar plan. A list of all such
options, warrants or other securities is attached hereto as Exhibit A (the
"Stock Options"). Additionally, any and all stock options, warrants or other
securities shall immediately vest and become exercisable and all such options,
warrants or other securities shall remain exercisable by Executive for a period
of 5 years from the Effective Date.

                  Paragraphs 2(i) - (vi) are collectively referred to as the
"Payment Obligations."

                  (b)      Company will withhold from the Payment Obligations
monies for federal, state, or local taxes or other standard withholdings, as
applicable.

                  (c)      Executive understands that the Payment Obligations
shall constitute the sole financial obligation of Company to Executive under
this Agreement and the Employment Agreement. Without limiting the generality of
the foregoing, Company will have no further obligation to Executive for the
payment of any car allowance, contributions to Company's 401(k) plan, or any
other benefits provided to full-time Company employees, unless expressly
provided for in this Agreement.

         3.       RELEASE FROM EMPLOYMENT AGREEMENT RESTRICTIONS.

                  (a)      Executive (on his own behalf and on behalf of his
heirs, personal representatives, and any other person who may be entitled to
make a claim on his behalf or through him) freely releases and discharges
Company, its directors, officers, employees, subsidiaries, predecessors,
successors, and assigns from any and all claims, charges, actions, and causes
of action of any kind or nature whatsoever that are known to Executive and that
Executive once had or now has or that arise on or before the Effective Date
arising out of Executive's employment, the Employment Agreement, or separation
of employment with Company. Executive agrees not to bring any charges, claims,
or actions against Company in the future, except claims, if any, which may
arise after the Effective Date.

                  (b)      Executive understands that many laws and regulations
relate to employment relationships, including Title VII of the Civil Rights Act
of 1964, as amended; the Age Discrimination in Employment Act of 1967, as
amended; the Americans with Disabilities Act of 1990; the National Labor
Relations Act, as amended; the Civil Rights Act of 1866, as amended; the
Employee Retirement and Income Security Act of 1974, as amended; the Family and
Medical Leave Act; the Fair Labor Standards Act, as amended; and various state
and local constitutional and statutory provisions and human rights laws as well
as the laws of contract and tort. EXECUTIVE INTENDS TO AND DOES

                                       2
<PAGE>

FULLY AND FINALLY RELEASE COMPANY FROM ANY AND ALL CLAIMS ARISING OUT OF OR
BASED UPON SUCH LAWS AND REGULATIONS THAT HE MAY HAVE ARISING FROM EVENTS
OCCURRING PRIOR TO THE EFFECTIVE DATE.

                  (c)      Executive represents that he does not currently have
on file, and has not made in any forum, any complaints, charges, or claims
(whether civil, administrative, or criminal) against Company. Executive agrees
that if, after signing this Agreement, he commences, joins in, or in any manner
seeks relief through any suit arising out of, based upon, or relating to any of
the claims released hereunder, or asserts in any manner against Company any of
the claims released hereunder, Executive shall pay to Company, in addition to
any other damages caused by Executive, all attorneys' fees incurred by Company
in defending or in otherwise responding to such suit or claim.

                  (d)      The Company, on its own behalf and behalf of its
directors, officers, employees, subsidiaries, predecessors, successors and
assigns, freely releases and discharges Executive (including his heirs and/or
personal representatives) from any and all claims, charges, actions, and causes
of action that that are known to the Company and that the Company once had or
now has or that arise on or before the Effective Date arising from Executive's
employment as an officer of the Company, the Employment Agreement, or
separation of employment by the Company. The Company agrees not to bring any
charges, claims, or actions against the Executive arising from Executive's
employment as an officer of the Company, the Employment Agreement or separation
of employment from the Company in the future, except claims, if any, which may
arise after the Effective Date.

                  (e)      Company represents that it does not currently have
knowledge of any claims against Executive arising out of Executive's employment
with Company. Company also acknowledges Executive's right to indemnification
for actions taken by Executive in his capacity as an officer of Company as
described in Section 9 of this Agreement.

         4.       NONCOMPETITION AGREEMENT. Executive acknowledges Company's
right to continue to enforce Section 4 of the Employment Agreement and to
assign its contractual rights under that section.

         5.       FUTURE RELATIONSHIP. For a period of two years from the
Effective Date, Executive will use his reasonable best efforts to assist
Company with any outstanding business and legal matters that Executive, as a
result of his position with Company, had knowledge of or was involved with
prior to the Effective Date. Legal matters, for purposes of this section, shall
include any litigation, arbitration, alternative dispute resolution, mediation,
or dispute resolution proceeding, to which Company is or may become a party.
Executive's obligation to assist with these legal matters shall include,
without limitation, the duty to provide live, in-person deposition or affidavit
testimony. Company will reimburse Executive for his reasonable expenses,
including reasonable attorneys fees, in assisting Company with the matters
referenced above.

         6.       INFORMED, VOLUNTARY SIGNATURE. Company has advised Executive
to consult counsel before executing this Agreement. Executive agrees that he
has done so and has had a full and fair opportunity to review this Agreement
and signs it knowingly, voluntarily, and without duress or coercion. Further,
in executing this Agreement, Executive agrees that he has not relied on any
representation or statement not set forth in this Agreement.

         7.       NO ADMISSION. The parties agree that this Agreement does not
constitute any admission by Executive or by Company or any of its officers,
directors, employees, agents, and representatives, or their respective
successors in interest of any: (i) violation of any statute, law, regulation,
order, or other applicable authority; (ii) breach of contract, actual or
implied; or (iii) commission of any tort.

                                       3
<PAGE>

         8.       OPPORTUNITY TO REVIEW AND RIGHTS OF REVOCATION. Pursuant to
federal law, this Agreement is revocable by Executive for seven days following
Executive's execution of the Agreement. The Agreement shall not become
effective or enforceable until that period expires. As a result, Company will
not pay any portion of the Payment Obligations to Executive until, at the
earliest, the eighth day after the Agreement is signed by Executive and
delivered to Company.

         9.       INDEMNITY. Company agrees, to the fullest extent permitted
under applicable law, the Employment Agreement, or the Company's articles of
incorporation or bylaws, to indemnify and hold harmless, Executive and his
heirs and personal representatives (collectively, the "Indemnified Parties")
against any costs or expenses (including attorneys' fees), judgments, fines,
losses, claims, damages, liabilities, and amounts paid in settlement in
connection with any claim, action, suite, proceeding, or investigation, whether
civil, criminal, administrative, or investigative, to the extent arising out of
or pertaining to any action or omission in Executive's capacity as an officer
of Company. In the event such claim, action, suit, proceeding, or investigation
(whether arising before or after the date hereof), (i) Company may assume the
defense of such action, in which case it shall have no obligation to indemnify
Executive against attorneys' fees (unless under applicable standards of
professional conduct, Company's counsel concludes that there is a conflict on
any significant issue between the positions of Executive and Company); (ii) any
counsel retained by the Indemnified Parties for any period after the date
hereof must be reasonably satisfactory to Company, and (iii) Executive will
cooperate in the defense of any such matter. Company will not be liable for any
settlement effected without its written consent (which consent will not be
unreasonably withheld).

         10.      MISCELLANEOUS.

                  (a)      This Agreement shall be interpreted and enforced in
accordance with the laws of the State of Florida. Each of the parties submits
to the jurisdiction of any state or federal court sitting in Tampa, Florida, in
any action or proceeding arising out of or relating to this Agreement and
agrees that all claims in respect of the action or proceeding may be heard and
determined by any such court. Each party also agrees not to bring any action or
proceeding arising out of or relating to this Agreement in any other court.
Each of the parties waives any defense of inconvenient forum to the maintenance
of any action or proceeding so brought and waives any bond, surety, or other
security that might be required of any other party with respect thereto.

                  (b)      This Agreement represents the sole and entire
agreement between the parties and supersedes any and all prior agreements,
negotiations, and discussions between the parties or their respective counsel
with respect to the subject matters covered in this Agreement.

                  (c)      If either party initiates proceedings for the
other's breach of this Agreement, the prevailing party shall recover attorneys'
fees and costs, including such fees and costs on any enforcement or appeal
proceedings.

                  (d)      If one or more paragraphs of this Agreement are
ruled invalid or unenforceable, such invalidity or unenforceability shall not
affect any other provision of the Agreement, which shall remain in full force
and effect.

                  (e)      This Agreement may be modified only by a writing
signed by both parties.

                  (f)      Both parties agree that, unless required by law or
by a court of competent jurisdiction, this Agreement shall remain confidential
and will not be used for any purpose other than enforcing its specific terms in
any proceeding between the parties. If this document must be filed in any court
proceeding, the person seeking to file it will do so only under seal, unless
expressly prohibited by the court.

                                       4
<PAGE>

                  (g)      This Agreement may be executed in two counterparts,
each of which shall constitute an original, but all of which together shall
constitute one and the same document.

                  (h)      The parties have participated jointly in the
negotiation and drafting of this Agreement. If an ambiguity or question of
intent or interpretation arises, this Agreement shall be construed as if
drafted jointly by the parties and no presumption or burden of proof shall
arise favoring or disfavoring any party by virtue of the authorship of any of
the provisions of this Agreement. Any reference to any federal, state, local,
or foreign statute or law shall be deemed also to refer to all rules and
regulations promulgated thereunder, unless the context requires otherwise. The
word "including" shall mean including without limitation.

         IN WITNESS WHEREOF, the parties have executed this Employment
Termination Agreement as of the day and year first above written.

                                    /s/ Nicholas R. Loglisci, Jr.
                                    -------------------------------------------
                                    Executive

                                    Company

                                    By: /s/ Roy E. Crippen, III
                                       ----------------------------------------
                                    Its: President and CEO
                                        ---------------------------------------

                                       5
<PAGE>
                                   EXHIBIT A

                  STOCK OPTIONS, WARRANTS AND OTHER SECURITIES

<TABLE>
<CAPTION>
TYPE                       GRANT DATE                     SHARES                        PRICE
----                       ----------                     ------                       -------
<S>                        <C>                            <C>                          <C>
ISO                         03/10/99                       2,858                       17.1875
ISO                         05/07/99                       2,142                       22.00
ISO                         01/13/00                      10,000                       10.1875
ISO                         07/06/00                      40,000                        6.06
</TABLE>

                                      A-1

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