BILLERICA, Mass.--(BUSINESS WIRE)--March 30, 2004--American Science and Engineering, Inc. (AMEX: ASE) (AS&E(R)), a leader in X-ray detection technology, announced today the return of Dr. Joseph Callerame to AS&E as Vice President, Science and Technology, effective April 15, 2004. Dr. Callerame has been on sabbatical in Florence, Italy, for the past 11 months.

"I am extremely pleased to announce that Dr. Callerame will be returning to AS&E as our Vice President of Science and Technology," said Anthony Fabiano, President and CEO. "In this role, Joe and his staff will develop new technologies and enhance current product offerings to meet customer expectations and fulfill present and future market needs in our rapidly evolving industry. Joe's technical leadership at AS&E is widely recognized by his colleagues and customers alike. His engaging style, acute intelligence and broad knowledge of our products, technologies and marketplace are most welcome assets for our organization."

Prior to joining AS&E in 1998, Dr. Callerame served at Raytheon Electronic Systems as Manager of Engineering and Technology Development. From 1993 to 1994 he served as Deputy General Manager of the Research Division of Raytheon, and from 1989 to 1992 he was Assistant General Manager of this Division. Prior to serving as Assistant General Manager, Dr. Callerame held the position of Manager, Infrared Detector Laboratory and the Stable Sources Laboratory. From 1977 to 1980, Dr. Callerame was a senior scientist in Medical Ultrasound at Raytheon's Research Division. Dr. Callerame earned his Ph.D. and master's degree in physics from Harvard University, and holds a bachelor's degree in chemical physics from Columbia University. Dr. Callerame also served as a Postdoctoral Fellow in Physics at MIT from 1975 to 1977.

About AS&E(R)

American Science and Engineering, Inc. develops and manufactures state-of-the-art X-ray inspection systems for homeland security and other critical defense applications. AS&E continues to innovate, create and develop new products by investing in new ideas through research and development, and evolving its technology to meet the needs of an ever-changing world. AS&E's patented Z(R) Backscatter technology detects plastic explosives, illegal drugs, and other contraband, even when artfully concealed in complex backgrounds by terrorists and smugglers. AS&E's Shaped Energy(TM) X-ray inspection systems combine the material discrimination features of Z(R) Backscatter imaging with the penetration capability of high-energy X-rays for dense cargoes, without the problems caused by excessive radiation. AS&E's High Energy Systems Division manufactures linear accelerators for a variety of applications including medical, scientific, security, electron beam curing and non-destructive testing. For more information on AS&E products and technologies, please visit http://www.as-e.com.

Safe Harbor Statement. The foregoing press release contains statements concerning AS&E's financial performance, markets and business operations that may be considered "forward-looking" under applicable securities laws. AS&E wishes to caution readers of this press release that actual results might differ materially from those projected in any forward-looking statements. Factors which might cause actual results to differ materially from those projected in the forward-looking statements contained herein include the following: significant reductions or delays in procurements of the Company's systems by the United States and other governments; disruption in the supply of any source component incorporated into AS&E's products and other factors which may cause delays in production and delivery schedules; litigation seeking to restrict the use of intellectual property used by the Company; potential product liability claims against the Company; failure of any of our products to meet performance requirements or to continue to operate reliably because of unexpected design flaws or manufacturing defects, global political trends and events which affect public perception of the threat presented by drugs, explosives and other contraband; global economic developments and the ability of governments and private organizations to fund purchases of the Company's products to address such threats; and the potential insufficiency of Company resources, including human resources, capital, plant and equipment and management systems, to accommodate any future growth, and future delays in federal funding. These and certain other factors which might cause actual results to differ materially from those projected are detailed from time to time in AS&E's periodic reports and registration statements filed with the Securities and Exchange Commission, which important factors are incorporated herein by reference. AS&E undertakes no obligation to update forward looking statements to reflect changed assumptions, the occurrence of unanticipated events, or changes in future operating results, financial condition or business over time.