MCLEAN, Va., Nov. 22
SI International announced today that it has been selected as
prime contractor to provide technical support to the Headquarters Air Force
Space Command Directorate of Requirements (HQ AFSPC/DR) in meeting its
objectives of the Analysis of Alternatives (AoA) Horizontal Integration
(AAHINT). The contract, competitively awarded by the GSA, is valued at
approximately $2,685,000 over a five-year period, which includes a one-year
base period with four additional one-year options, exercisable by the
Government.

SI International will assist the HQ AFSPC/DR in developing and
implementing the organizational construct, tools, systems engineering methods,
and management information structure across several AoAs. AoAs are the
systematic review of potential solutions to a recognized military need.

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 important factors, including
those discussed in the Risk Factors section of the registration statement on
Form S-1 filed by SI International, Inc. with the Securities and Exchange
Commission and available directly from the Commission.