McLean, VA – Alion Science and Technology, an employee-owned technology solutions provider, has been awarded a Defense Threat Reduction Agency (DTRA) task order with a value of $21.8 million to support the agency’s mission of safeguarding the United States and its allies from weapons of mass destruction. Alion and its partners will examine nuclear detection technologies that can lead to more robust capabilities in that area. Alion’s experts will formulate work plans, monitor research and assess progress and provide a performance assessment of “game-changing” technologies with high-risk, high-reward profiles. This follow-on task order comes from the Indefinite-Delivery/Indefinite-Quantity (IDIQ) DTRA Arms Control contract that Alion was awarded in February 2002. “The Alion team will play a vital role in assisting the government in theentification and transition of critical technologies in support of defense against weapons of mass destruction,” said Sue Archer, Alion Senior Vice President and Manager of the Operational Solutions Group. “Our work will help DTRA with formulating long-range research projects and uncovering those with the greatest potential benefits to reduce the threats posed by nuclear weapons.” Alion’s partners are the University of Michigan, Kansas State University, Radiation Monitoring Devices, Proportional Technology Inc., Orbis Inc. and AUSGAR Inc. The period of performance runs through December 17, 2011. 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 70 years of R&D and engineering expertise, Alion brings innovation and insight to multiple business areas: naval architecture & marine engineering; defense operations; systems engineering; modeling & simulation; information management & technology; chemical, biological, nuclear & environmental sciences; wireless spectrum engineering; and industrial technology. Based in McLean, Virginia, Alion employee-owners are located at major offices, customer sites and laboratories worldwide. For more information, call 877.771.6252 or visit Alion online at www.alionscience.com. For more information, contact:                                                                              Peter J. Jacobs Phone: 703.269.3473 E-mail: pjacobs@alionscience.com This press release contains information about management’s view of Alion’s 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.