Alion Schedules Second Quarter/ First Half Year Financial Results Conference Call

McLean, VA – May 7, 2007 – Alion Science and Technology, an employee-owned technology solutions company, announced today that it will host a conference call on May 17, 2007 at 2:00 p.m. ET / 11:00 a.m. PT to discuss its second quarter and first half-year 2007 financial and operating results.

Participants may join the conference call by dialing 866-604-5972 (for U.S. participants) or 706-679-2503 (for International participants) ten minutes prior to the start of the conference. The conference pass-code number is 8017023. The transcription and information needed to access the telephone replay will be available in the Media Room of the Alion Web site following the conference call.

About Alion Science and Technology
Alion Science and Technology (pronounced: ah-LYE-un) 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 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 and marine engineering. 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.

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.