Centrex CEO Named Chairman of the Board of Homeland Security Technology Council.

Business Editors/Health/Medical Writers

Homeland Security Summit 2003

WASHINGTON--(BUSINESS WIRE)--July 1, 2003

Centrex, Inc. (OTCBB:CNEX) today announced that Dr. Thomas R. Coughlin, Jr., the Company's CEO, has been named Chairman of the Board of the Homeland Security Technology Council (HSTC). The HSTC is a non-profit organization of Homeland Security technology users, manufacturers, developers and suppliers which serves as an information and consultation resource for government and industry. While the HSTC is composed of a diverse group of representatives from government, private industry and academia, all are focused on Homeland Security technology development and applications.

As Chairman and Director for the HSTC, Dr. Coughlin will be involved in initiating peer review processes and helping establish industry standards for biodetection devices, in cooperation with the Interagency Board for Equipment Standardization and Interoperability, as well as other agencies. He will also continue in his duties as CEO of Centrex, Inc. Centrex, Inc. is a development stage company that owns the exclusive worldwide license to develop, manufacture and market a system for detecting microbial contamination in air, food and water by recognizing the unique genetic fingerprint of the contaminant. The initial technology was developed at the Los Alamos National Laboratory. For more information, visit the Centrex website at www.centrexcorporation.com or contact Loren Brown at [phone].

Dr. Coughlin also acts as the HSTC's Washington liaison, and as such, is a direct representative to the Federal Government for the HSTC. The HSTC's Washington initiatives started in the fall of 2002 and have included meetings with officials from the National Academy of Sciences, the Senate Commerce Committee, the House Science Committee, the White House Office of Science and Technology Policy, the Department of Homeland Security, the Department of Defense, the Department of Health and Human Services, the Department of Energy and the Department of Commerce and several members of the House and Senate. Through these meetings, the Council has been able to set up a framework for ongoing discussions with other Federal officials and agencies for immediate implementation now that Congressional legislation has established a new U.S. Department of Homeland Security.

More recent follow-up Washington conferences have helped expand upon the potential role of the HSTC in the Homeland Security arena, and aided in defining specific areas of need where the HSTC can make a viable contribution. For example, the HSTC is part of the Steering Group for the Department of Energy/National Energy Technology Laboratory's Technology Development Program Plan for U.S. Energy Infrastructure Security.

Membership in the Homeland Security Technology Council is open to any organization, company, government agency, academic institution or individual having an interest in promoting Homeland Security through the application of innovative and evolving technologies. The HSTC will have a membership and exhibit booth at the Homeland Security Summit being held in Atlanta, September 17-20th. For more information on the Council and membership opportunities, please visit the booth at the Homeland Security Summit or see the HSTC website at: www.thehstc.us.

This press release contains some forward-looking statements. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise. Forward-looking statements in this document should be evaluated together with the many uncertainties that affect our business. Those uncertainties are discussed in the Company's SEC filings.