Anteon Awarded $29.8M Contract from Department of Interior; Information Technology and Systems Integration Services Support for

Anteon International Corporation (NYSE:ANT), a leading
information technology, systems integration and engineering services
company, today announced a contract awarded from the Department of the
Interior's (DOI), Minerals Management Service (MMS) to provide
information technology, systems integration, application development,
systems operations and customer support services to MMS headquarters,
as well as its regional offices in the Gulf of Mexico, the Pacific,
and Alaska. The estimated value of this contract, if all options are
exercised, is $29.8 million over a five year period of performance.
   "This contract win demonstrates Anteon's growing capabilities in
the Federal civilian market, providing information technology and
systems integration support to the Department of Interior," stated Dan
Johnson, Anteon chief operating officer. The primary location of
Anteon's work is in New Orleans, with additional work conducted in
Camarillo, California and Anchorage, Alaska.
   The Anteon team will provide a wide range of IT services in
support of the DOI MMS Offshore Minerals Management Organization (OMM)
mission, providing safe, environmentally sound mineral development on
the Outer Continental Shelf (OCS) and overseeing the exploration and
production of our nation's offshore natural gas, oil and other mineral
resources. Anteon will also support the development, enhancement, and
maintenance of OCS Connect - a project to move OMM services to online
delivery in order to more efficiently connect with stakeholders,
enhance technical analysis and improve the security of data exchange.

   About Anteon

   Anteon, headquartered in Fairfax, Virginia, is a leading
information technology company serving the U.S. Federal government and
international customers. Anteon designs, integrates, maintains, and
upgrades state-of-the-art systems for national defense, intelligence,
homeland security, and other high priority government missions. Anteon
provides numerous government clients with the systems integration,
strategy and program management, systems engineering, operations
services, and simulation and training skills necessary to manage the
development and operations of their mission critical systems. The
Company was founded in 1976 and currently employs over 9,500 employees
in more than 100 offices worldwide. Anteon consistently ranks among
the top information technology integrators based on independent
surveys, and has been named to the Forbes List of the 400 Best Big
Companies in 2005, earning distinction on the Forbes Platinum List.
Anteon is listed on the Standards & Poor's MidCap 400 Index. For more
information, visit www.anteon.com.

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Company's dependence on continued funding of U.S. government programs,
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reflect the Company's current beliefs and are based upon information
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however, to update the guidance provided today prior to its next
earnings release.