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                                                                   Exhibit 10.10

                              CARRY PROMISSORY NOTE

September 7, 2001                                                        $42,587

                  Jack Pearlstein ("MAKER"), hereby promises to pay to the order
of DigitalNet Holdings, Inc. (the "COMPANY"), the aggregate unpaid principal
amount of this Note, together with interest thereon calculated from the date
hereof in accordance with the provisions of this Note.

                  This Note is one of the promissory notes referred to in the
Senior Management Agreement, dated as of September ___, 2001, by and among the
Company, DigitalNet, Inc., a Delaware corporation, and Maker (the "MANAGEMENT
AGREEMENT"). Sections 1(a)(ii) and 1(b)(i) of the Management Agreement contain
provisions for the issuance of this Note upon the terms and conditions specified
therein. Capitalized terms used herein and not otherwise defined shall have the
meanings given to them in the Management Agreement.

                  1. ACCRUAL OF INTEREST. Interest shall accrue on the
outstanding principal amount of this Note at a rate equal to the lesser of (i)
5% per annum and (ii) the highest rate permitted by applicable law, compounded
annually.

                  2. PAYMENT OF PRINCIPAL AND INTEREST ON NOTE.

                  (a) SCHEDULED PAYMENTS. Executive shall repay the principal
amount and interest of this Note in 36 equal monthly installments of the
principal amount of this Note (i.e., $1,183) (plus the accrued interest on such
principal amount being repaid) on the last day of each full calendar month
beginning with the first full calendar month following the date hereof.

                  (b) MANDATORY PREPAYMENTS. Upon a Liquidity Event, Maker shall
pay the entire principal amount then outstanding and any accrued interest to the
Company. In addition, in the event Maker, or any of his permitted transferees,
receives any net cash proceeds in connection with the Carried Stock (whether
held by Maker or one or more of Maker's permitted transferees, other than the
Company and the Investors (as defined in the Management Agreement)), Maker shall
prepay (up to an amount equal to the principal amount and interest on the
portion of this Note relating to such Carried Stock for which net cash proceeds
are received) any amounts owed pursuant to this Note by applying all of such
proceeds FIRST, to any accrued interest and SECOND, to any principal then
outstanding.

                  (c) OPTIONAL PREPAYMENTS. Maker may, at any time and from time
to time without premium or penalty, prepay all of the outstanding principal
amount of the Note; provided that any prepayment will be accompanied by a
payment of accrued interest on the portion being prepaid. A prepayment of less
than all of the outstanding principal amount of the

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Note shall not relieve Maker of his obligation to make the payments on the Note
pursuant to Sections 2(a) and 2(b) above.

                  (d) RIGHT OF OFFSET. The Maker shall be entitled to offset any
amounts owed to the Maker by the Company, now existing or hereinafter arising,
pursuant to and as set forth in Section 4 of the Management Agreement between
the Company and the Maker, against any amounts payable under this Note.
Following an Event of Default, the Company shall be entitled to offset any
amounts owed to the Company by the Maker, now existing or hereinafter arising,
pursuant to this Note against any amounts payable by the Company to the Maker
pursuant to and as set forth in the Management Agreement between the Company and
the Maker.

                  (e) RECOURSE. Notwithstanding anything herein or in any other
agreement, instrument or other document to the contrary, the Maker shall be
personally liable for 100% of the repayment of the indebtedness evidenced by
this Note or for any claim of any kind based thereon.

                  3. EVENTS OF DEFAULT.

                  (a) DEFINITION. For purposes of this Note, an Event of Default
shall be deemed to have occurred if:

                           (i) Maker fails to pay when due, the full amount of
         any principal or interest payment, and such amount remains unpaid for 2
         business days following receipt of written notice from the Company; or

                           (ii) Maker makes an assignment for the benefit of
         creditors or admits in writing his inability to pay his debts generally
         as they become due; or an order, judgment or decree is entered
         adjudicating Maker bankrupt or insolvent; or any order for relief with
         respect to Maker is entered under the Federal Bankruptcy Code; or Maker
         petitions or applies to any tribunal for the appointment of a
         custodian, trustee, receiver or liquidator of any substantial part of
         Maker's assets, or commences any proceeding relating to Maker under any
         bankruptcy, reorganization, arrangement, insolvency, readjustment of
         debt, dissolution or liquidation law of any jurisdiction; or any such
         petition or application is filed, or any such proceeding is commenced,
         against Maker and either (A) Maker by any act indicates its approval
         thereof, consent thereto or acquiescence therein or (B) such petition,
         application or proceeding is not dismissed within 60 days.

                  (b) CONSEQUENCES OF EVENTS OF DEFAULT. If an Event of Default
has occurred the aggregate principal amount of the Note (together with all
accrued interest thereon and all other amounts payable in connection therewith)
shall become immediately due and payable without any action on the part of the
Company, and Maker shall immediately pay to the Company all amounts due and
payable with respect to the Note.

                  Maker, or his successors and assigns, hereby waives diligence,
presentment, protest and demand and notice of protest and demand, dishonor and
nonpayment of this Note,

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and expressly agrees that this Note, or any payment hereunder, may be extended
from time to time and that the Company may accept security for this Note or
release security for this Note, all without in any way affecting the liability
of Maker hereunder.

                  In the event that Maker fails to pay any amounts due hereunder
when due, Maker shall pay to the Company, in addition to such amounts due, all
costs of collection, including, without limitation, reasonable attorneys fees.

                  4. AMENDMENT AND WAIVER. Except as otherwise expressly
provided herein, the provisions of the Note may be amended and Maker may take
any action herein prohibited, or omit to perform any act herein required to be
performed by it, only if Maker has obtained the written consent of the Company.

                  5. CANCELLATION. After all principal and accrued interest at
any time owed on this Note has been paid in full, this Note shall be surrendered
to Maker for cancellation and shall not be reissued.

                  6. PLACE OF PAYMENT. Payments of principal and interest are to
be delivered to the Company at the following address:

                           DigitalNet Holdings, Inc.
                           6700A Rockledge Drive, Suite 525
                           Bethesda, MD 20817
                           Attention:  President and Chief Executive Officer

or to such other address or to the attention of such other person as specified
by prior written notice to Maker.

                  7. USURY LAWS. It is the intention of the Company and Maker to
conform strictly to all applicable usury laws now or hereafter in force, and any
interest payable under this Note shall be subject to reduction to the amount not
in excess of the maximum legal amount allowed under the applicable usury laws as
now or hereafter construed by the courts having jurisdiction over such matters.
If the maturity of this Note is accelerated by reason of an election by the
Company resulting from an Event of Default, voluntary prepayment by Maker or
otherwise, then earned interest may never include more than the maximum amount
permitted by law, computed from the date hereof until payment, and any interest
in excess of the maximum amount permitted by law shall be canceled automatically
and, if theretofore paid, shall at the option of the Company either be rebated
to Maker or credited on the principal amount of this Note, or if this Note has
been paid, then the excess shall be rebated to Maker. The aggregate of all
interest (whether designated as interest, service charges, points or otherwise)
contracted for, chargeable, or receivable under this Note shall under no
circumstances exceed the maximum legal rate upon the unpaid principal balance of
this Note remaining unpaid from time to time. If such interest does exceed the
maximum legal rate, it shall be deemed a mistake and such excess shall be
canceled automatically and, if theretofore paid, rebated to Maker or credited on
the principal amount of this Note, or if this Note has been repaid, then such
excess shall be rebated to Maker.

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                  8. GOVERNING LAW. This Note is made under and governed by the
internal law, not the laws of conflicts, of the State of Delaware.

                                    * * * * *

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                  IN WITNESS WHEREOF, Maker has executed and delivered this Note
as of the date above.

                                                     /s/ JACK PEARLSTEIN
                                                     -------------------------
                                                     JACK PEARLSTEIN

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                                                                   EXHIBIT 10.11

                         FREE TRANSFERABILITY AGREEMENT

          THIS FREE TRANSFERABILITY AGREEMENT (this "Agreement"), dated as of
September 25, 2002, is made by and among DigitalNet Holdings, Inc., a Delaware
corporation (the "Company"), and Jack Pearlstein ("Executive"). Capitalized
terms used and not otherwise defined herein shall have the meanings accorded to
such terms in the Senior Management Agreement referred to below.

          WHEREAS, this Agreement supplements the Senior Management Agreement
dated as of September 7, 2001 among Executive, the Company and DigitalNet, Inc.
(as amended from time to time in accordance with its terms, the "Senior
Management Agreement") and the Stockholders Agreement dated as of September 7,
2001, by and among the Company and the stockholders of the Company, including
Executive (as amended from time to time in accordance with its terms, the
"Stockholders Agreement") to permit Executive to sell to a Purchaser for Value
(as defined in Section 1 below), to the extent unvested, all or any portion of
the 346,087 shares of Carried Stock and 245,722 shares of Reserved Stock
purchased by Executive from the Company on April 25, 2002 in accordance with
Sections 1(b)(i) and 1(b)(ii), respectively, of the Senior Management Agreement
(the "Securities").

          NOW, THEREFORE, in consideration of the mutual promises set forth
herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby expressly acknowledged by each party hereto, the
parties hereby agree as follows:

          1.   PERMITTED SALE OF UNVESTED EXECUTIVE STOCK. Notwithstanding any
provision to the contrary in the Senior Management Agreement or in the
Stockholder Agreement, but subject to the right of first refusal set forth in
Section 2 below, from and after the date hereof, Executive and his permitted
transferees will have the right to sell any Securities which constitute Unvested
Executive Stock as of the time such sale is consummated (the "Unvested
Securities") to any Person not related to or affiliated with Executive in an
arm's-length transaction, for fair market value payable solely in cash at the
closing of the sale or in installments over time (herein, a "Purchaser for
Value"). For purposes hereof:

          (a)  a "Person" means an individual, a partnership (general, limited
or limited liability), a corporation, a limited liability company, an
association, a joint stock company, a trust, a joint venture, an unincorporated
organization, or a governmental, quasi-governmental, judicial or regulatory
entity or any department, agency or political subdivision thereof; and

          (b)  a Person "related to or affiliated with Executive" means any
Person that is (i) Executive's spouse, (ii) any grandparent (natural or adopted)
of Executive or his spouse, (iii) any descendant (natural or adopted) of any
such grandparent, and (iv) any trust, corporation, partnership or other Person,
if the individuals described in (i), (ii), or (iii) above own or hold,
individually or in the aggregate, directly or indirectly, a beneficial or record
interest of 5% or more of any class of equity or debt of such Person, or if any
such individual has served or will serve as a director, officer or employee of
such Person in the six months before or after the Transfer.

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The terms of this Agreement shall not apply to any Securities which constitute
Vested Executive Stock as of the time any sale, transfer, assignment, pledge or
other disposal (each, a "Transfer") of such Securities is scheduled to occur and
the Transfer of such Securities shall be subject to the terms and conditions
contained in the Senior Management Agreement and Stockholders Agreement.

          2.   RIGHT OF FIRST REFUSAL.

          (a)  OFFER TO THE COMPANY. If Executive or any of his permitted
transferees desire to sell the Unvested Securities to any Purchaser for Value,
the seller (the "Seller") will deliver written notice (the "Offer Notice") to
the Company at least 30 days before effecting any such sale. The Offer Notice
will disclose in reasonable detail the identity of the proposed transferee of
such Unvested Securities, the price for which the Unvested Securities is be
transferred (which must be fully payable in cash either at the closing or in
installments) and the other proposed terms and conditions of the sale. The Offer
Notice will include a representation by the Seller that the proposed purchaser
is not a Person "related to or affiliated with Executive" (as defined in Section
1(b) above) and a copy, certified by the Seller, of a written offer by the
proposed purchaser to purchase the Unvested Securities setting forth the price
and the other proposed terms and conditions of the sale.

          (b)  ACCEPTANCE BY THE COMPANY. The Company may elect to purchase all
or any portion of the Unvested Securities specified in the Offer Notice at the
price and on the other terms specified therein by delivering written notice of
such election (the "Acceptance Notice") to the Seller during the period
commencing on the date of delivery of the Offer Notice and ending at 5:00 p.m.,
Chicago time, on the 30th day following such date (the "Offer Expiration Date").
If the Company timely elects to purchase all or any portion of the Unvested
Securities specified in the Offer Notice, the purchase of such Unvested
Securities will be consummated at the time and place designated by the Company
in the Acceptance Notice (which will be as soon as practicable but in any event
within 60 days after the date of delivery of the Offer Notice). The Company may
assign its right to purchase the Unvested Securities under this Section 2(b) to
any third party at any time before the closing of such purchase, provided that
such third party must execute a joinder to become a party to the Stockholders
Agreement prior to purchasing any Unvested Securities.

          (c)  SALE TO THIRD PARTY. If the Company does not elect to purchase
all or any portion of the Unvested Securities specified in the Offer Notice, the
Seller may, within 30 days after the Offer Expiration Date, transfer the
remaining Unvested Securities offered in the Offer Notice to the Purchaser for
Value specified therein at the price and on the other terms and conditions
specified therein; provided that in connection with and prior to any such
transfer, the Purchaser for Value will execute a joinder to become a party to
the Stockholders Agreement. In the event that Executive does sell any Unvested
Securities to a Purchaser for Value, then Executive shall promptly turn over the
proceeds of such sale to an escrow agent to be mutually agreed upon by Executive
and the Company, and the proceeds will remain with the escrow agent until
distributed in accordance with an escrow agreement to be entered into among
Executive, the Company and the escrow agent (the "Escrow Agreement"). The form
of the Escrow Agreement will be mutually agreed upon in good faith by both the
Company and Executive and will provide, among other things, that the proceeds
will be returned to Executive at such time as

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Executive satisfies his obligations to the Company under Section 4 hereof, to
the extent not earlier distributed to the Company in satisfaction of Executive's
obligations under Section 4 hereof.

          (d)  AMENDMENT TO STOCKHOLDERS AGREEMENT. The Stockholders Agreement
is hereby amended to exclude from the first refusal provisions contained in
Section 5 thereof any sale of Unvested Securities to any Purchaser for Value
pursuant to this Agreement.

          (e)  AMENDMENT TO SENIOR MANAGEMENT AGREEMENT. The Senior Management
Agreement is hereby amended to exclude from the vesting and repurchase
provisions contained in Sections 2, 3 and 4 thereof and the transfer
restrictions contained in Section 5 thereof any Unvested Securities sold to any
Purchaser for Value pursuant to this Agreement.

          3.   The parties hereto agree that no sale pursuant to this Agreement
will result in a decrease in the aggregate number of shares of Reserved Stock
available under the Senior Management Agreement. Therefore, if any Unvested
Securities sold to a Purchaser for Value pursuant to this Agreement constitute
unvested Reserved Stock, Executive agrees to replace such shares with an equal
number of shares of common stock of the Company that Executive otherwise owns
(the "Replacement Shares"). Thereafter, the Replacement Shares shall constitute
Reserved Stock for all purposes of the Senior Management Agreement.

          4.   NO RESTRICTIONS ON RESALE. Unvested Securities sold to a
Purchaser for Value (or to the Company or the Company's assignee) in compliance
with Section 2 above will, without any further action on the part of Executive
or the Company, no longer be subject to any provision of this Agreement or the
Senior Management Agreement, but will remain subject to the Stockholders
Agreement.

          5.   PAYMENT TO THE COMPANY. If a Separation occurs with respect to
Executive for any reason, and any Unvested Securities were theretofore sold
pursuant to Section 2 above, Executive will be obligated to pay the Company, as
indemnification and consideration for the waivers and other agreements made by
the Company herein, an amount equal to the number of such Unvested Securities so
sold multiplied by the excess of (i) the greater of (A) the price per share paid
by the Purchaser for Value, the Company or the Company's assignee, as the case
may be, for each such share and (B) the Fair Market Value of each such share
(calculated as of the date of the Separation), over (ii) the Original Cost of
each such share. The amount payable to the Company under this Section 4 will be
paid by Executive in cash within five business days after the date of
Termination.

          6.   SCOPE OF WAIVER. The provisions of this Agreement are intended by
the parties to extend solely to the matters specifically provided herein and are
not intended as a waiver of any provision of the Senior Management Agreement or
Stockholders Agreement not directly affected hereby, or of any other right or
remedy of the Company in connection therewith.

          7.   CHOICE OF LAW. All questions concerning the construction,
validity and interpretation of this Agreement and the exhibits hereto will be
governed by and construed in accordance with the internal laws of the State of
Delaware, without giving effect to any choice of

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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.

          8.   AMENDMENT. The provisions of this Agreement may be amended only
with the prior written consent of the Company and Executive.

          9.   NOTICES. All notices to be given pursuant hereto shall be in
writing and shall be personally delivered, sent by overnight courier service, or
sent by registered or certified mail, postage prepaid and return receipt
requested to the addresses indicated in the Senior Management Agreement.

          10.  COUNTERPARTS. This Agreement may be executed in two or more
counterparts (including by means of telecopied signature pages), each of which
need not contain the signature of more than one party hereto, but all of which
together will constitute one and the same original Agreement.

          11.  HEADINGS. The headings in this Agreement are for convenience of
reference only and are not part of this Agreement.

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          IN WITNESS WHEREOF, the parties have executed this Free
Transferability Agreement as of the date first written above.

                                 DIGITALNET HOLDINGS, INC.

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

                                       /s/ Jack Pearlstein
                                 ---------------------------------------------
                                 JACK PEARLSTEIN

For purposes of Sections 2(d) and 2(e) hereof:

                                 DIGITALNET, INC.
                                 By:       /s/ Ken S. Bajaj
                                      -----------------------------------
                                 Its:      Chief Executive Officer
                                      -----------------------------------

                                 GTCR FUND VII, L.P.

                                 By:      GTCR Partners VII, L.P.
                                 Its:     General Partner

                                 By:      GTCR Golder Rauner, L.L.C.
                                 Its:     General Partner

                                 By:       /s/ Bruce V. Rauner
                                          ------------------------------------
                                 Name:      Bruce V. Rauner
                                          ------------------------------------
                                 Its:     Principal

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                                 GTCR CO-INVEST,  L.P.

                                 By:      GTCR Partners VI, L.P.
                                 Its:     General Partner

                                 By:      GTCR Golder Rauner, L.L.C.
                                 Its:     General Partner

                                 By:       /s/ Bruce V. Rauner
                                          ------------------------------------
                                 Name:      Bruce V. Rauner
                                          ------------------------------------
                                 Its:     Principal

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