On November 13, 2008, SI International, Inc., a Delaware corporation (the "Company") and Serco Group plc, a public limited company organized under the laws of England and Wales ("Serco Group"), issued a press release announcing that, at a special meeting of stockholders held today, SI International's stockholders voted to adopt the Agreement and Plan of Merger (the "Merger Agreement"), dated August 26, 2008, by and among the Company, Serco Group, Serco Inc., a New Jersey Corporation and Matador Acquisition Corporation, a Delaware corporation and wholly-owed subsidiary of Serco Inc. (the "Merger Agreement"). The approval of SI International's stockholders was a condition to completion of the merger. The merger continues to be subject to, among other conditions, certain other regulatory approvals. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

d) Exhibits.

Exhibit No.                                  Description
   99.1        Press release, dated November 13, 2008, issued by SI
               International, Inc. and Serco Group plc.