GUARANTY AGREEMENT SUPPLEMENT, dated as of April 19, 2004 (the
“Supplement”), made by User Technology Associates, Inc., a Virginia
corporation (the “New Guarantor”), in favor of Bank of America, N.A., as
Administrative Agent (in such capacity, the “Administrative Agent”) under
the Credit Agreement (as defined in the Guaranty Agreement referred to below) for the
ratable benefit of itself and the Lenders (as defined in the Guaranty Agreement referred
1. Reference is hereby made to the Subsidiary Guaranty Agreement dated as of November
26, 2002 (as amended, restated supplemented or otherwise modified as of the date hereof,
the “Guaranty Agreement”), made by certain subsidiaries of DigitalNet
Holdings, Inc. (“Holdings”) and DigitalNet, Inc. (the
“Borrower”) party thereto on the Closing Date or otherwise joined as a
party thereto (such subsidiaries collectively, the “Guarantors”, and
each, a “Guarantor”), in favor of the Administrative Agent for the
benefit of itself and the Lenders. This Supplement supplements the Guaranty Agreement,
forms a part thereof and is subject to the terms thereof. Capitalized terms used and not
defined herein shall have the meanings given thereto or referenced in the Guaranty
2. The New Guarantor hereby agrees to unconditionally guarantee to the Administrative
Agent, for the ratable benefit of itself and the Lenders, and their respective successors,
endorsees, transferees and assigns, the prompt payment (whether at stated maturity, by
acceleration or otherwise) of all Obligations of the Borrower to the same extent and upon
the same terms and conditions as are contained in the Guaranty Agreement.
3. The New Guarantor hereby agrees that by executing this Supplement it is a party to
the Guaranty Agreement as if a signatory thereto on the Closing Date of the Credit
Agreement, and the New Guarantor shall comply with all of the terms, covenants, conditions
and agreements and hereby makes each representation and warranty, in each case set forth
therein. The New Guarantor agrees that the “Subsidiary Guaranty Agreement”,
“Guaranty Agreement” or “Guaranty” as used therein or in any other
Loan Documents shall mean the Guaranty Agreement as supplemented hereby.
4. The New Guarantor hereby acknowledges it has received a copy of the Guaranty
Agreement and that it has read and understands the terms thereof.
WITNESS WHEREOF, the undersigned hereby causes this Supplement to be executed and
delivered as of the date first above written.