SI International to Announce Third Quarter 2003 Earnings on October 28, 2003

RESTON, Va.--Sept. 30, 2003--SI International, Inc. will release its third quarter fiscal year 2003 financial results on Tuesday, October 28, 2003 prior to the market opening. Following the release of the information, SI International has scheduled a conference call for 10:00 AM ET.

Participating in the conference call will be SI International's Chairman and CEO Ray Oleson, President and COO Brad Antle, and Executive Vice President and CFO Ted Dunn. A question and answer session will be included to further discuss the results.

The conference call will be webcast simultaneously to the public through a link on the Investor Relations section of SI International's web site, www.si-intl.com. A replay of the webcast will be available on the SI International web site beginning two hours after the conclusion of the conference call. In addition, a replay of the conference is available by telephone beginning on Tuesday, October 28, 2003 at 1:00 PM ET through Tuesday, November 4, 2003 at 5:00 PM ET by calling 1(888) 286-8010 and entering the conference passcode number 39560150.

About SI International: SI International is a provider of information technology and network solutions primarily to the federal government. The company combines technological and industry expertise to provide a full spectrum of state-of-the-practice solutions and services, from design and development to documentation and operations, to assist clients in achieving their missions. More information about SI International can be found at www.si-intl.com.