SI International Awarded $5 Million USSTRATCOM Subcontract; Supporting the Headquarters U.S. Strategic Command Joint Force Headquarters-Information Operations.

Business Editors/High-Tech Writers

RESTON, Va.--(BUSINESS WIRE)--Nov. 3, 2003

SI International, Inc. (Nasdaq:SINT), an information technology and network solutions (IT) company, announced today that it has a subcontract with SAIC, under the United States Strategic Command (USSTRATCOM) Systems and Missions Support (USAMS) Blanket Purchase Agreement contract (BPA). The company will provide technical engineering and analysis services that support the information operations mission at Headquarters U.S. Strategic Command, Offutt AFB, NE.

Under the one-year base period and four one-year options that began on October 1, 2003, SI International will provide key information operations integration and analysis support on three separate tasks to USSTRATCOM. If all of the option years are exercised, the value of those task orders is approximately $5 million.

This past month, the SAIC team with SI International as a member, was awarded a USAMS BPA that pre-qualified the team to bid for task orders under this BPA. USSTRATCOM is responsible for providing missile warning and advocating missile warning and missile defense capabilities for all combatant commanders in addition to their information operations mission.

"SI International's strong background and expertise in information operations are a perfect fit for supporting this Command," said Brad Antle, President and Chief Operating Officer of SI International. "These task order wins demonstrate our continued focus on space systems transformation and information centric warfare."

For more than twelve years, SI International has served as a contractor for the military space community including Headquarters North American Aerospace Defense Command (NORAD), Headquarters Air Force Space Command (AFSPC), Headquarters Army Space Command (ARSPACE), and United States Space Command (USSPACECOM) - now United States Strategic Command (USSTRATCOM). In addition, SI International has supported the Spacelift Range Systems, Range Standardization and Automation, military satellite communication (Milsatcom) systems, and the Air Force Satellite Control Network since 1996.

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.

This press release contains various remarks about the future expectations, plans and prospects of SI International, Inc. that constitute forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. The actual results of SI International, Inc. may differ materially from those indicated by these forward-looking statements as a result of various risks and uncertainties including :differences between authorized amounts and amounts received by SI International under government contracts; government customers or prime contractor failure to exercise options under contracts; changes in federal government (or other applicable) procurement laws, regulations, policies and budgets; and SI International's ability to attract and retain qualified personnel; and the important factors discussed in the Risk Factors section of the annual report on Form 10-K/A filed by SI International, Inc. with the Securities and Exchange Commission and available directly from the Commission at www.sec.gov.