Alion Invests in VectorCommand Ltd.

For more information contact: Peter J.Jacobs Assistant Vice President Phone: 703.269.3473 or Email: pjacobs@alionscience.com

McLean , VA , May 9, 2005 - Alion Science and Technology today announced that it recently completed an investment in VectorCommand Ltd. of Hampshire , UK , and has become a 12% owner of the company. Alion is a technology solutions company delivering technical expertise and operational experience to the Department of Defense, civilian government and industry. VectorCommand designs and delivers cutting-edge technology for training simulations, emergency management and command operations.

This investment gives Alion the exclusive rights to represent current and future VectorCommand products throughout the U.S. and selected countries worldwide. VectorCommand products are included in Alion's offerings for emergency management and first response organizations, known as the company's "Solutions for all Hazards" toolbox.

"Through the investment in the VectorCommand product line, Alion will be able to provide existing and potential customers with a full-service set of tools for first responders training, and design and management of emerging response units," said Alion's Chairman and CEO, Dr. Bahman Atefi. "We would like to provide these services to our existing Department of Homeland Security customers and to state and local governments."

"The partnership with Alion is a great opportunity for VectorCommand," said Jeremy Azis, Managing Director of VectorCommand. "Not only will this give us the opportunity to increase our awareness in the United States , we will also be leveraging our combined capabilities to deliver comprehensive solutions to first responders and emergency management teams."

VectorCommand products will become part of the services Alion provides to the U.S. military and first responders.

About Alion Science and Technology Alion Science and Technology is an employee-owned technology solutions company delivering technical expertise and operational support to the Department of Defense, civilian government agencies and commercial customers. Building on almost 70 years of R&D and engineering experience, Alion brings innovation and insight to multiple business areas: defense operations; modeling & simulation; wireless communication; industrial technology; chemical, biological, nuclear & environmental sciences; information technology; and naval architecture & marine engineering. Based in McLean , Virginia , Alion has more than 2600 employee-owners at major offices, customer sites and laboratories worldwide. For more information, call 877.771.6252 or visit Alion online at www.alionscience.com.

About VectorCommand VectorCommand is a leading international emergency services software and services company, specializing in the development of sophisticated planning, training and simulation and operational command solutions for emergency services of all types and at all levels. Building on its success supplying fire services throughout the world with advanced fire simulation and training solutions, the company has gone on to develop EmergencyCommand, a comprehensive, flexible suite of software solutions for preparing for and managing public safety threats such as avian bird flu, wildfires, tsunamis and other inundations, refinery and airport fires and terrorism-related threats such as chemical, biological and radiological attacks.

This press release contains information about managementxs view of Alionxs future expectations, plans and prospects that constitute forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995.  Actual results may differ materially from those indicated by these forward-looking statements as a result of a variety of risk factors and uncertainties discussed in documents periodically filed by Alion with the SEC .   Due to such uncertainties and risks, readers are cautioned not to place undue reliance on such forward-looking statements, which speak only as of the date hereof.