SI International Awarded More Than $450 Million in Federal Contracts During Month of September

RESTON, Va., Oct. 11 /PRNewswire-FirstCall/ -- SI International, Inc. (Nasdaq: SINT), an information technology and network solutions (IT) company announced today that it has been awarded more than thirty Federal government contracts and subcontracts during the month of September with an estimated value in excess of $450 million, if all options are exercised. Through these awards, SI International will provide mission-critical IT services associated with intelligence, port security, Department of Defense consolidation, IT modernization, records management, logistics, and business process outsourcing.

The estimated value includes the Company's recently announced $225 million contract supporting the Department of Homeland Security (DHS) U.S. Immigration and Customs Enforcement and the $8 million contract supporting the U.S. Army Defense Ammunition Center. Details on the unannounced material contract wins will be provided in future news releases pending customer approval, and during SI International's quarterly earnings conference call to be held on Tuesday, October 30, 2007 at 10:00 AM ET .

"SI International's reputation for applying our Rapid Response, Rapid Deployment process to meeting the unique needs of our Federal government customers is reaping rewards. Besides winning new contracts, we are expanding our customer relationship with new and existing clients," said Brad Antle , President and CEO of SI International. "We continue to believe that our core focus areas of Federal IT modernization, homeland defense, defense transformation, and mission-critical outsourcing will provide attractive growth opportunities for the foreseeable future."

About SI International:

SI International, a member of the Russell 2000 and S&P SmallCap 600 indices, is a provider of information technology and network solutions (IT) primarily to the federal government. The Company combines technology 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. SI International is ranked as the 42nd largest Federal Prime IT Contractor by Washington Technology and has approximately 4,700 employees. More information about SI International can be found at

The above-referenced statements may contain forward-looking statements that are made pursuant to the safe-harbor provisions of the Private Securities Litigation Reform Act of 1995. Expressions of future goals, financial information or reporting, and similar expressions reflecting something other than historical fact are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. These forward-looking statements may involve a number of risks and uncertainties, which are described in the Company's filings with the Securities and Exchange Commission. These risks and uncertainties include: changes in federal government (or other applicable) procurement laws, regulations, policies and budgets; risks relating to contract performance; changes in the competitive environment (including as a result of bid protests); and the important factors discussed in the Risk Factors section of the annual report on Form 10-K filed by the Company with the Securities and Exchange Commission and available directly from the Commission at The actual results may differ materially from any forward-looking statements due to such risks and uncertainties. The Company undertakes no obligations to revise or update any forward-looking statements in order to reflect events or circumstances that may arise after the date of this release.

SOURCE SI International, Inc.