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                                                                Exhibit 10.28

                            GetronicsWang Co. LLC
                              290 Concord Road
                       Billerica, Massachusetts 01821

                              February 28, 2003

DigitalNet Holdings, Inc.
DigitalNet,Inc.
DigitalNet Government Solutions LLC
2525 Network Place
Herndon, VA. 20171

Gentlemen:

         The purpose of this letter is to set forth certain understandings we
have reached regarding the Purchase Agreement, dated as of September 27, 2002
(the "Agreement"), by and among the undersigned and you, and capitalized
terms used and not otherwise defined herein shall have the meanings ascribed
to them in the Agreement.

         1. ADJUSTMENT OF THE PURCHASE PRICE. Simultaneously with the
execution of this letter, in full satisfaction of the respective rights and
obligations of Parent, the Company, Holdings and Purchaser under
Sections 2.5(a), (b), (c) and (d) of the Agreement, and in lieu of the process
regarding the Closing Statements (including the Closing Balance Sheet)
contemplated by Section 2.5(b) of the Agreement, the Company is paying Parent
$8,262,000 (the "ADJUSTMENT PAYMENT"). The amount of the Adjustment Payment
is the aggregate amount to be paid to Parent pursuant to Section 2.5(c) of
the Purchase Agreement, and in no event shall Parent, the Company, Holdings
or Purchaser at any time be required to make any further payments, or
otherwise satisfy any other obligations, pursuant to Sections 2.5(a), (b),
(c) or (d) of the Agreement. The Closing Statements (including the Closing
Balance Sheet) attached as Exhibit A hereto shall be deemed to be the Final
Closing Statements (and Final Closing Balance Sheet) for purposes of
Sections 5.10, 8.2 and 8.3 of the Agreement.

         2. CSOC CUSTOMER CONTRACT.

               (a) CLOSING CSOC SPREADSHEET. Attached as Exhibit B hereto is
the Closing CSOC Spreadsheet reflecting Undisputed Closing CSOC Accounts
Receivable of $7,950,000, Undisputed Post-Closing CSOC Accounts Receivable of
$8,503,000, Disputed Closing CSOC Accounts Receivable of $5,847,000 and
Disputed Post-Closing CSOC Accounts Receivable of $2,062,000.

               (b) POST-CLOSING CSOC SPREADSHEETS. Attached as Exhibit C
hereto is the Post-Closing CSOC Spreadsheet for the month ending January 31,
2003 (the "January CSOC Spreadsheet") which (i) reflects (w) the actual
receipt by the Company

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and the payment over to Parent of an amount equal to the Undisputed Closing
CSOC Accounts Receivable pursuant to Section 5.14(e)(ii)(aa) of the Agreement
and Section 2(c) of this letter, (x) the actual and projected receipt and
retention by the Company of an amount equal to the Undisputed Post-Closing CSOC
Accounts Receivable pursuant to Section 5.14(e)(ii)(bb) of the Agreement, (y)
the projected receipt by the Company and the projected payment over to Parent
of an amount equal to the Disputed Closing CSOC Accounts Receivable pursuant
to Section 5.14(e)(ii)(cc) of the Agreement and (z) the projected receipt and
retention by the Company of an amount equal to the Disputed Post-Closing CSOC
Accounts Receivable pursuant to Section 5.14(e)(ii)(dd) of the Agreement, in
each case, based on the settlement of the CSOC Action pursuant to the
Settlement Agreement between the Company and the CSOC Customer, dated
December 31, 2002, the two amendments to the CSOC Customer Contract, dated
January 31, 2003 made in connection with such settlement and the proposed
first amendment subsequent to such settlement and amendments described to
Parent in connection with this letter which proposed first amendment may be
presented to Parent for Parent's consent pursuant to Section 5.14(f) of the
Agreement, and (ii) contains certain supplementary information related to
this letter. The Post-Closing CSOC Spreadsheets delivered by the Company to
Parent pursuant to Section 5.14(d) of the Agreement after the date hereof
shall include the supplementary information included in the January CSOC
Spreadsheet.

               (c) PAYMENT OF UNDISPUTED CLOSING CSOC ACCOUNTS RECEIVABLE.
Simultaneously with the execution and delivery of this letter, the Company
is paying over to Parent an amount equal to the Undisputed Closing CSOC
Accounts Receivable of $7,950,000 pursuant to Section 5.14(e)(ii)(aa) of the
Agreement. Parent shall not at any time sue or otherwise assert any claim
(whether pursuant to the Agreement or otherwise) against any of Purchaser,
Holdings or the Company relating to, in connection with or as a result of the
late payment of such amount to Parent in accordance with the Agreement.

               (d) PAYMENT OF DISPUTED CLOSING CSOC ACCOUNTS RECEIVABLE. The
Company shall, and Holdings and Purchaser shall cause the Company to, pay
over to Parent the Disputed Closing CSOC Accounts Receivable of $5,847,000
pursuant to Sections 5.14(e)(ii)(cc) of the Agreement, except that if
Holdings consummates a Public Offering (as defined in the Amended and
Restated Certificate of Incorporation) before the Company has so paid such
amount over to Parent, then not later that the fifth business day after the
consummation thereof, the Company shall, and Holdings and Purchaser shall
cause the Company to, pay over to Parent an amount equal to the difference
between $5,847,000 and the amount paid over to Parent pursuant to
Section 5.14(e)(ii)(cc) of the Agreement prior to such consummation.
Following the making of such payment, in no event shall Purchaser, Holdings
or the Company at any time be required to make any further payments, or
otherwise satisfy any other obligations, pursuant to Section 5.14(e)(ii)(cc)
of the Agreement.

               (e) RELEASES FROM ESCROW. Simultaneously with the execution
and delivery of this letter, Parent and Purchaser are giving the Agent (as
defined in the Escrow Agreement) Mutual Notices of Instruction (as defined in
the Escrow Agreement) in the form of Exhibits D and E hereto instructing the
Agent to release to Parent

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$8,873,000 of the Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund
and $725,000 of the Disputed Post-Closing CSOC Accounts Receivable Escrow Fund,
leaving $0 in the Undisputed Post-Closing CSOC Accounts Receivable Escrow Fund
and $1,028,000 in the Disputed Post-Closing CSOC Accounts Receivable Escrow
Fund (such amounts remaining in the Disputed Post-Closing CSOC Accounts
Receivable Escrow Fund being hereinafter collectively referred to as the
"Remaining Escrow Fund"). If the CSOC Customer continues to pay the Company
substantially as projected in the January CSOC Spreadsheet, then, in lieu of
instructing the Agent pursuant to Section 1.3(b)(iv) of the Escrow Agreement
to make the releases of the Remaining Escrow Fund that would but for this
sentence be required pursuant to Section 1.3(a)(iv) of the Escrow Agreement
on January 7, 2004, Parent and Purchaser shall give the Agent a Mutual
Notice of Instruction in the form of Exhibit F hereto instructing the Agent
to release to Parent all amounts in the Remaining Escrow Fund; provided,
however, from and after any such date such a Mutual Notice of Instruction is
not so given, Parent and Purchaser shall resume instructing the Agent
pursuant to Section 1.3(b)(iv) of the Escrow Agreement to the make the
releases of the Remaining Escrow Fund required pursuant to Section 1.3(a)(iv)
of the Escrow Agreement.

         3. RIGHT TO PURCHASE SERIES B PREFERRED STOCK. If Holdings
consummates a Public Offering on or prior to August 26, 2003, Holdings may
purchase all or any portion of the shares of Series B Preferred Stock then
owned by Parent or its Affiliates by paying each holder thereof an amount
equal to the Liquidation Value (as defined in the Amended and Restated
Certificate of Incorporation) of each share of Series B Preferred Stock so
purchased plus all accrued and unpaid dividends on each such share (and any
such shares so purchased will not be automatically converted in connection
with such Public Offering in accordance with the Amended and Restated
Certificate of Incorporation and any such shares not so purchased will be
automatically converted in connection with such Public Offering in accordance
with the Amended and Restated Certificate of Incorporation). If any Affiliate
of Parent owns any shares of Series B Preferred Stock, Parent shall cause such
Affiliate(s) to sell all or any portion of such shares to Holdings in
accordance with this Section 3. Payment for such shares of Series B Preferred
Stock shall be made immediately prior to consummation of the Public Offering
by delivery by Holdings to Parent or any such Affiliate of a promissory note
or notes in the form of Exhibit G hereto and in an aggregate principal amount
equal to the aggregate Liquidation Value of such shares of Series B Preferred
Stock plus all accrued and unpaid dividends on such shares, which promissory
note or notes shall be due and payable in immediately available funds
immediately upon consummation of the Public Offering. In connection with the
consummation of its Public Offering, Holdings intends to amend its Amended
and Restated Certificate of Incorporation, which amendment is presently
intended to be substantially in the form attached hereto as Annex 1, and
Parent agrees to vote, and cause its affiliates to vote, all shares of
Series B Preferred Stock owned by Parent in favor of such amendment or
otherwise provide its consent to such amendment.

         4. CERTAIN AGREEMENTS. Simultaneously with the execution of this
letter, (a) in full satisfaction of the respective rights and obligations of
Parent, the Company,

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Holdings and Purchaser under Section 5.7(e)(iii) of the Agreement, Parent is
paying the Company $87,500 and (b) in full satisfaction of the respective
rights and obligations of Parent, the Company, Holdings and Purchaser under
Section 5.7(e)(v) of the Agreement, Parent is paying the Company $250,000.

         5. NETTING OF PAYMENT OBLIGATIONS. The Company is making payments to
Parent pursuant to Sections 1 and 2(c) hereof in an aggregate amount equal to
$16,212,000 ($8,262,000 PLUS $7,950,000), and Parent is making payments to
the Company pursuant to Sections 4(a) and 4(b) hereof in an aggregate amount
equal to $337,500 ($250,000, PLUS $87,500). For the convenience of the parties
and in full satisfaction of all of the payment obligations of the parties under
such Sections, simultaneously with the execution and delivery of this letter
the Company is paying Parent $15,874,500 ($16,212,000 LESS $337,500) by wire
transfer of immediately available funds.

         6. FULL FORCE AND EFFECT. The Agreement and Escrow Agreement, as in
effect on the date hereof, except for the relief from, satisfaction of and
alternative ways to satisfy certain rights and obligations thereunder set
forth in this letter, shall remain in full force and effect. The right given
to Holdings to purchase shares of Series B Preferred Stock in Section 3 shall
not effect the terms of, or the rights and obligations with respect to, the
Series B Preferred Stock in the Amended and Restated Certificate of
Incorporation, the Stockholders Agreement or otherwise.

         7. MISCELLANEOUS. For the convenience of the parties hereto, this
letter may be executed in any number of counterparts (including by facsimile
signature), each such counterpart being deemed to be an original instrument,
and all such counterparts shall together constitute one agreement. This
letter shall be governed by, and construed in accordance with, the Laws of
the State of Delaware, without regard to the conflict of law provisions
thereof. The parties hereto agree and acknowledge that money damages would not
be an adequate remedy for any breach of this letter and that the parties may
apply to any court of law or equity of competent jurisdiction for specific
performance and injunctive relief (without posing a bond or other security) in
order to enforce or prevent any breach of this letter.

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         If this letter reflects our understandings with respect to the
foregoing, please sign this letter which will then constitute our agreement
with respect thereto.

                                     Very truly yours,

                                     GETRONICSWANG CO. LLC

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

Agreed and accepted
as of February 28, 2003

DIGITALNET HOLDINGS, INC.

By: /s/ KEN S. BAJAJ
    -------------------------------
    Name:  Ken S. Bajaj
    Title: President and Chief Executive Officer

DIGITALNET, INC.

By: /s/ KEN S. BAJAJ
    -------------------------------
    Name:  Ken S. Bajaj
    Title: President and Chief Executive Officer

DIGITALNET GOVERNMENT SOLUTIONS, LLC
By: Its Sole Member

DIGITALNET, INC.

By: /s/ KEN S. BAJAJ
    -------------------------------
    Name:  Ken S. Bajaj
    Title: President and Chief Executive Officer<PAGE>

                                                                  EXHIBIT 10.29

                    PROFESSIONAL SERVICES AGREEMENT

          THIS PROFESSIONAL SERVICES AGREEMENT (this "AGREEMENT"), dated as
of September __, 2001, between GTCR Golder Rauner, L.L.C., a Delaware limited
liability company ("GTCR"), and DigitalNet, Inc., a Delaware corporation (the
"COMPANY").

          WHEREAS, the Company is a wholly owned subsidiary of DigitalNet
Holdings, Inc., a Delaware corporation (the "PARENT");

          WHEREAS, GTCR Fund VII, L.P., a Delaware limited partnership ("GTCR
FUND VII"), and GTCR Co-Invest, L.P., a Delaware limited partnership
("CO-INVEST") (each an "INVESTOR" and collectively, the "INVESTORS"), will
purchase (the "INVESTMENT") pursuant to that certain Purchase Agreement (the
"PURCHASE AGREEMENT") of even date herewith between the Parent, the
Investors, the J. Sunny Bajaj Trust, the Rueben Bajaj Trust and the Bajaj
Family Limited Partnership and Pearlstein Family, LLC, a portion of the
Company's Common Stock, par value $0.001 per share (the "COMMON STOCK"), and
Class A Preferred Stock, par value $0.01 per share (the "CLASS A PREFERRED"
and together with the Common Stock, the "STOCK");

          WHEREAS, the Company desires to receive financial and management
consulting services from GTCR, and obtain the benefit of the experience of
GTCR in business and financial management generally and its knowledge of the
Company and the Company's financial affairs in particular; and

          WHEREAS, in connection with the Investment, GTCR is willing to
provide financial and management consulting services to the Company and the
compensation arrangements set forth in this Agreement are designed to
compensate GTCR for such services.

          NOW, THEREFORE, in consideration of the foregoing premises and the
respective agreements hereinafter set forth and the mutual benefits to be
derived herefrom, GTCR and the Company hereby agree as follows:

          1. ENGAGEMENT. The Company hereby engages GTCR as a financial and
management consultant, and GTCR hereby agrees to provide financial and
management consulting services to the Company and its subsidiaries, all on
the terms and subject to the conditions set forth below.

          2. SERVICES OF GTCR. GTCR hereby agrees during the term of this
engagement to consult with the Company's board of directors (the "Board") and
management of the Company and its subsidiaries in such manner and on such
business and financial matters as may be reasonably requested from time to
time by the Board, including but not limited to:

          (i)     corporate strategy

          (ii)    budgeting of future corporate investments;

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          (iii)   acquisition and divestiture strategies; and

          (iv)    debt and equity financings.

          3. PERSONNEL. GTCR shall provide and devote to the performance of
this Agreement such partners, employees and agents of GTCR as GTCR shall deem
appropriate for the furnishing of the services required thereby.

          4. PLACEMENT FEES. At the time of any purchase of Stock by the
Investors pursuant to Section 1B of the Purchase Agreement or otherwise, the
Company shall pay to GTCR a placement fee in immediately available funds
equal to one percent (1.0%) of the amount paid by the Investors to the Parent
in connection with such purchase.

If any individual payment to GTCR pursuant to Section 4 would be less than
$10,000, then such payment shall be held by the Company until such time as
the aggregate of such payments equals or exceeds $10,000.

          5. MANAGEMENT FEE. Commencing on the date of the Initial Closing
(as defined in the Purchase Agreement) and until the date six months after
the date of the Initial Closing, the Company shall pay to GTCR an annual
management fee of $200,000 and thereafter during the remaining term of this
Agreement, the Company shall pay to GTCR an annual management fee of $300,000.
Such management fee shall be payable in equal monthly installments.

          6. EXPENSES. The Company shall promptly reimburse GTCR for such
reasonable travel expenses, legal fees and other out-of-pocket fees and
expenses as have been or may be incurred by GTCR, its directors, officers
and employees in connection with the Closing (as defined in the Purchase
Agreement), in connection with any financing of the Parent, the Company or
any of their subsidiaries, and in connection with the rendering of any other
services hereunder (including, but not limited to, fees and expenses incurred
in amending Company-related meetings).

          7. TERM. This Agreement will continue from the date of the Initial
Closing (as defined in the Purchase Agreement) until the earlier of (i) GTCR
Fund VII, Co-Invest and their respective affiliates ceasing to own in the
aggregate at least 50% of the Investor Common (as defined in the Purchase
Agreement) issued or transferred to such persons, (ii) a Sale of the Company
(as defined in the Purchase Agreement), or (iii) a Public Offering (as
defined in the Purchase Agreement). No termination of this Agreement, whether
pursuant to this paragraph or otherwise, shall affect the Company's
obligations with respect to the fees, costs and expenses incurred by GTCR in
rendering services hereunder and not reimbursed by the Company as of the
effective date of such termination.

          8. LIABILITY. Neither GTCR nor any of its affiliates, partners,
employees or agents shall be liable to the Parent, the Company or their
subsidiaries or affiliates for any loss, liability, damage or expense arising
out of or in connection with the performance of services contemplated by this
Agreement,

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Unless such loss, liability, damage or expense shall be proven to result
directly from the gross negligence or willful misconduct of GTCR.

          9. INDEMNIFICATION. The Company agrees to indemnify and hold
harmless GTCR, its partners, affiliates, officers, agents and employees
against and from any and all loss, liability, suits, claims, costs, damages
and expenses (including attorney's fees) arising from their performance
hereunder, except as a result of their gross negligence or intentional
wrongdoing.

         10. GTCR AN INDEPENDENT CONTRACTOR. GTCR and the Company agree that
GTCR shall perform services hereunder as an independent contractor, retaining
control over and responsibility for its own operations and personnel. Neither
GTCR nor its directors, officers, or employees shall be considered employees or
agents of the Parent or any of its subsidiaries as a result of this Agreement
nor shall any of them have authority to contract in the name of or bind the
Parent or any of its subsidiaries, except as expressly agreed to in writing by
the Company.

         11. NOTICES. Any notice, report or payment required or permitted to be
given or made under this Agreement by one party to the other shall be deemed to
have been duly given or made if personally delivered or, if mailed, when mailed
by registered or certified mail, postage prepaid, to the other party at the
following addresses (or at such other address as shall be given in writing by
one party to the other):

         IF TO GTCR:
         ----------

                  GTCR Golder Rauner, L.L.C.
                  6100 Sears Tower
                  Chicago, IL 60606-6402
                  Attention: Philip A. Canfield

                  WITH A COPY TO:
                  --------------

                  Kirkland & Ellis
                  200 East Randolph Drive
                  Chicago, IL  60601
                  Attention: Stephen L. Ritchie

         IF TO THE COMPANY:
         -----------------

                  DigitalNet, Inc.
                  6700A Rockledge Drive, Suite 525
                  Bethesda, MD  20817
                  Attention: Ken S. Bajaj

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                  WITH COPIES TO:
                  --------------

                  GTCR Golder Rauner, L.L.C.
                  6100 Sears Tower
                  Chicago, IL  60606-6402
                  Attention: Philip A. Canfield

                  Kirkland & Ellis
                  200 East Randolph Drive
                  Chicago, IL 60601
                  Attention: Stephen L. Ritchie

                  Fried, Frank, Harris, Shriver & Jacobson
                  1001 Pennsylvania Avenue
                  Washington, D.C. 20004
                  Attention: Richard A. Steinwurtzel

         12. ENTIRE AGREEMENT: MODIFICATION. This Agreement, those documents
expressly referred to herein and other documents of even date herewith embody
the complete agreement and understanding among the parties and supersede and
preempt any prior understandings, agreements or representations by or among the
parties, written or oral, which may have related to the subject matter hereof in
any way. The provisions of this Agreement may be amended, modified and waived
only with the prior written consent of the Company and GTCR.

         13. WAIVER OF BREACH. The waiver by either party of a breach of any
provision of this Agreement by the other party shall not operate or be construed
as a waiver of any subsequent breach of that provision or any other provision
hereof.

         14. ASSIGNMENT. Neither GTCR nor the Company may assign its rights
or obligations under this Agreement without the express written consent of the
other, except that GTCR may assign its rights and obligations to an affiliate of
GTCR.

         15. SUCCESSORS. This Agreement and all the obligations and benefits
hereunder shall inure to the successors and permitted assigns of the parties.

         16. COUNTERPARTS. This Agreement may be executed and delivered by each
party hereto in separate counterparts (including by means of telecopied
signature pages), each of which when so executed and delivered shall be deemed
an original and both of which taken together shall constitute one and the same
agreement.

         17. CHOICE OF LAW. This Agreement shall be governed by and construed in
accordance with the domestic laws of the State of Delaware, without giving
effect to any choice of law or conflict of law provision or rule (whether of the
State of Delaware or any other jurisdiction) that would cause the application of
the laws of any jurisdiction other than the State of Delaware.

                                   * * * * *

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         IN WITNESS WHEREOF, GTCR and the Company have caused this
Professional Services Agreement to be duly executed and delivered on the date
and year first above written.

                                   GTCR GOLDER RAUNER, L.L.C.

                                   By:  /s/ BRUCE V. RAUNER
                                        -------------------------
                                   Name: BRUCE V. RAUNER
                                        -------------------------
                                   Its: Principal
                                        -------------------------

                                   DIGITALNET, INC.

                                   By:  /s/ KEN S. BAJAJ
                                        -------------------------
                                   Name: Ken S. Bajaj
                                        -------------------------
                                   Its: Chief Executive Officer
                                        -------------------------

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