<Page>

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                  FORM 10-Q/A
                               (AMENDMENT NO. 1)
                   QUARTERLY REPORT UNDER SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                                   (Mark One)

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934

                   FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2001

                                       OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934

   For the transition period from __________________ to _____________________

                        Commission file number 000-21561

                                   MCSI, INC.
    (Exact name of registrant as specified in its articles of incorporation)

                  MARYLAND                           31-1001529
      (State or other jurisdiction of             (I.R.S. Employer
       incorporation or organization)            Identification No.)

                4750 HEMPSTEAD STATION DRIVE, DAYTON, OHIO 45429
                    (Address of principal executive offices)

                                 (937) 291-8282
              (Registrant's telephone number, including area code)

         Indicate by check whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) had been subject to such
filing requirements for the past 90 days.

                               Yes   X      No
                                   -----      -----

         At August 10, 2001, 12,785,568 shares of common stock, no par value per
share, of the registrant were outstanding.

<Page>

                            PART II-OTHER INFORMATION

         The Registrant previously filed Exhibit 10.43 with certain portions
omitted pursuant to a request for confidential treatment. Exhibit 10.43 is
filed herewith in its entirety.


ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

       None.

(a)   Exhibits

         EXHIBIT 10.42 - Amendment No. 12 to the Amended and Restated Credit
         Agreement as of December 1, 1998 among the Company, as the Borrower,
         the Financial Institutions Named therein, as Lenders, National City
         Bank, as a Lender and as Documentation Agent, PNC Bank, National
         Association, as a Lender, the Swing Line Lender, a Letter of Credit of
         Issuer and as Administrative Agent, dated March 30, 2001.*

         EXHIBIT 10.43 - Amendment No. 13 to the Amended and Restated Credit
         Agreement, dated as of December 1, 1998 among the Company, as the
         Borrower, the Financial Institutions Named therein, as Lenders,
         National City Bank, as a Lender and as Documentation Agent, PNC Bank,
         National Association, as Lender, the Swing Line Lender, a Letter of
         Credit of Issuer and as Administrative Agent, dated June 29, 2001.

         EXHIBIT 99.0 - Safe Harbor Under the Private Securities Litigation
         Reform Act of 1995.*

--------------------
* previously filed.

                                       2
<Page>

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 thereunto duly authorized.

                                      MCSi, Inc.
                                         (Registrant)

Date:  November 16, 2001
                                      By:/s/ Ira H. Stanley
                                      Ira H. Stanley
                                      Vice President - Chief Financial Officer


                                       3