SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                        Date of Report: December 4, 2001

              (Date of earliest event reported): November 20, 2001

                               PEC SOLUTIONS, INC.
                               -------------------
             (Exact name of registrant as specified in its charter)

                                    DELAWARE
                 (State or other jurisdiction of incorporation)

             000-30271                                54-1339972
       (Commission File No.)               (IRS Employer Identification No.)


                             12750 Fair Lakes Circle
                             Fairfax, Virginia 22033

              (Address of principal executive offices and zip code)

       Registrant's telephone number, including area code: (703) 679-4900





ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS.

         On November 20, 2001, PEC Solutions, Inc. ("PEC") acquired all the
outstanding stock of TROY Systems, Inc. ("TROY") pursuant to a Stock Purchase
Agreement dated as of November 20, 2001 (the "Agreement").

         Under the terms of the Agreement, the stockholders of TROY received an
aggregate of $15.3 million in cash, subject to certain adjustments as set forth
in the Agreement, and 103,065 shares of PEC common stock. In addition, PEC also
assumed certain key employee retention liabilities of up to $1.5 million. The
terms of the acquisition are more fully described in the Agreement (attached as
Exhibit 2.1 to this report on Form 8-K). Certain stockholders of TROY are also
entitled to certain registration rights with respect to their shares as detailed
in the Registration Rights Agreement dated as of November 20, 2001, among PEC
and the stockholders of TROY (attached as Exhibit 4.1 to this report on Form
8-K).

         PEC issued a press release announcing the Acquisition on November 20,
2001, which is filed herewith as Exhibit 99.1 and is incorporated herein by
reference.


ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.


         (a)      FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED.

         The financial statements of TROY Systems, Inc. will be filed by
amendment not later than 60 days from the due date of the initial report on
Form 8-K.

         (b)      PRO FORMA FINANCAL INFORMATION.

         The pro forma financial information of the combined company will be
filed by amendment not later than 60 days from the due date of the initial
report on Form 8-K.

         (c)      EXHIBITS

         2.1      Stock Purchase Agreement by and among PEC Solutions, Inc.,
TROY Systems, Inc. and the stockholders of TROY Systems, Inc. dated as of
November 20, 2001.

         4.1      Registration Rights Agreement among PEC Solutions, Inc. and
the stockholders of TROY Systems, Inc. dated as of November 20, 2001.

         99.1     Press Release dated November 20, 2001.





                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                         PEC SOLUTIONS, INC.



Date:  December 4, 2001                  By:   /s/ STUART R. LLOYD
                                              ----------------------------------
                                                Stuart R. Lloyd
                                                Chief Financial Officer, Senior
                                                Vice President and Director
                                                (Principal Financial Officer and
                                                Accounting Officer)