ETC’s Sterilization Systems Group Awarded Major New Contract

Southampton, PA, June 10, 2010 — Environmental Tectonics Corporation’s (OTC Bulletin Board-ETCC) (“ETC” or the “Company”) Sterilization Systems Group (SSG) announced today the award of a new contract for multiple large Ethylene Oxide (EtO) Sterilization Systems to a major multi-national corporation. The contract calls for three industrial EtO Systems, sophisticated material handling systems, emissions control systems and validation consulting work. The contract value exceeds US $3.5 million.

Ethylene Oxide Sterilization is the most common method used to sterilize medical devices. ETC’s EtO Sterilization Systems are the most advanced in the world for large medical device manufacturers. ETC has invested heavily in technologies to improve their efficacy, economy and reliability.

David Mitchell, Business Unit Manager of ETC Sterilization Systems, commented, “ETC was selected for this project largely due to our unique and pioneering designs, from our PRO-GENESIS™ Advantage SCADA control system, the most advanced of its kind in the industry, to our air-heated/cooled chamber jacketing. ETC is a technology-based company. Innovative energy-efficient solutions tailored to customer requirements provide ETC with a competitive edge.”

ETC’s SSG offers steam and Ethylene Oxide Sterilizer Systems, Professional Services, Consulting and Software Systems to the Medical Device, Pharmaceutical, Biotechnology and Life Science industries. We offer unique, customized solutions to unique process systems challenges.

---

This press release contains forward-looking statements, which are based on management's current expectations and are subject to uncertainties and changes in circumstances. Words and expressions reflecting something other than historical fact are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. The Company's actual results could differ materially from those anticipated in forward-looking statements as a result of a variety of factors, including those discussed in "Risk Factors" included in the Company's most-recent Annual Report on Form 10-K filed with the United States Securities and Exchange Commission. We caution you not to place undue reliance on these forward-looking statements.