ETC Sterilization Announces Major Contract; Supports “Green” Initiative

Southampton, PA, April 21, 2009 – Environmental Tectonics Corporation (ETC:AMEX) (“ETC” or the “Company”) Sterilization Systems Group (SSG) today announced the award of a major new contract to retrofit 12 sterilizers with new control systems, process piping and the addition of a set of chillers and a chilled water distribution loop to service these systems. The project value from a domestic customer approximates $2.5 million.

The project is a comprehensive “environmentally green” project which is designed to dramatically reduce the consumption of water by reusing cooling water and nearly eliminating all wastewater from the current sterilizers. The project calls for ETC to retrofit the customer’s older and dated sterilizers (which were manufactured by another supplier) with state of the art control systems, vacuum systems and adding the chilled water loop for cooling all twelve industrial sterilizers. The project will save the customer significant money in reduced energy consumption and maintenance expense, all while improving process reliability with redundant back-up capacity. The largest benefit will be the reduction of tens of thousands of gallons of wastewater each year. Additionally, this project will extend the useful life of their equipment at a fraction what it would cost to replace their systems and comply with current environmental standards.

John Fay, SSG’s Director of Professional Services, stated, “We are very pleased to have received this major project which supports ETC’s “Green” initiative. This system will reduce energy, cut maintenance costs and prolong the life of our customer’s equipment while drastically reducing their wastewater from the process. Advancing applied sterilizer technology in an environmentally sound way is an ongoing objective of ETC’s Sterilization Systems Group.”

ETC’s Sterilization Systems Group offers steam and Ethylene Oxide sterilizers, Services, Consulting and Software Systems to the Medical Device, Pharmaceutical, Biotechnology and Healthcare industries. ETC’s SSG offers 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.