Anteon Sets Earnings Release Date for Q3 2005 Results

Anteon International Corporation (NYSE:ANT) today
announced that it will release its third-quarter fiscal 2005 financial
results on October 26, 2005, at 7:30 a.m. EDT. Following the release
of the information, the Company has scheduled a conference call for
10:00 a.m. EDT.
   Hosted by Anteon senior management, the conference call will be
webcast simultaneously through a link on the Investor Relations
section of the Company's Website, located at www.anteon.com. A replay
of the conference call will also be available by telephone starting at
1:00 p.m. EDT through November 02, 2005, at [phone] or (973)
341-3080 (international). The conference call identification number is
6568554. A replay of the webcast will be available on the Anteon
Website from approximately one hour after the conclusion of the
conference call through November 02, 2005.

   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 9,300 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.