Environmental Tectonics Corporation Announces First Quarter Fiscal 2011 Results		Page 1 of 3

Exhibit 99.1

Environmental Tectonics Corporation Announces First Quarter Fiscal 2011 Results

Southampton, PA, July 14, 2010 — Environmental Tectonics Corporation (OTC Bulletin Board: ETCC) (“ETC”, “we”, or the “Company”) today announced financial results for the first quarter of fiscal 2011 which ended on May 28, 2010.

The reader is referred to the Company’s Quarterly Report on Form 10-Q for the period ended May 28, 2010, filed on July 12, 2010, for additional information on the Company’s financial results.

Overview

ETC was incorporated in 1969 in Pennsylvania and we operate in two segments: the Training Services Group (TSG) and the Control Systems Group (CSG). Product categories included in TSG are pilot training and tactical flight simulators, disaster management systems and entertainment applications. The CSG segment includes sterilizers, environmental control devices and hyperbaric and hypobaric chambers along with parts and service support.

Financial Results

		Summary Table of Results
		13 weeks ended13 weeks endedVarianceVariance
		May 28, 2010				May 29, 2009				$				%
		(amounts in thousands)								(   ) =Unfavorable
Sales:
Domestic		$	2,918			$	1,959			$	959				49.0	%
US Government			3,986				1,836				2,150				117.1
International			5,217				5,786				(569	)			(9.8	)
Total Sales			12,121				9,581				2,540				26.5
Gross Profit			5,130				4,427				703				15.9
Selling and marketing expenses			1,102				1,254				152				12.1
General and administrative expenses			1,463				1,602				139				8.7
Research and development expenses			324				228				(96	)			(42.1	)
Operating income			2,241				1,343				898				66.9
Interest expense, net			228				516				288				55.8
Other expense, net			72				55				(17	)			(30.9	)
Income taxes			—				—				—				n/a
Noncontrolling interest			5				2				(3	)			(150.0	)
Net income		$	1,936			$	770			$	1,166				151.4	%
Net income per common share (basic)		$	0.15			$	0.06			$	0.09				150.0	%
Net income per common share (diluted)		$	0.09			$	0.06			$	0.03				50.0	%

The Company had a net income of $1,936,000 or $0.15 per share (basic) and $0.09 (diluted) during the first quarter of fiscal 2011 compared to net income of $770,000 or $0.06 per share (basic and diluted), for the first quarter of fiscal 2010, representing an improvement of $1,166,000, 151.4%. The improvement reflected a significant increase in gross profit (reflecting the higher sales level) coupled with lower operating expenses and interest expense. Increased research and development expenses acted as a partial offsets.

Sales increases in the first quarter of fiscal 2011 were realized in the U.S. Government and Domestic markets offset in part in by a decline in International sales. Increased domestic sales reflected a significant increase in the sterilizer product line (up $1,507,000) of our Control Systems Group, partially offset by declines in most other product areas. U.S. Government sales increased as a result of sales of the Company’s Pilot Training Systems products under significant contracts from the U.S. Navy for a research disorientation trainer and the U.S. Air Force to provide a high performance training and research human centrifuge. International sales reflected lower simulation sales (down $1,048,000) primarily for a contract in the Middle East which was completed in fiscal 2010.

Gross profit for the first quarter of fiscal 2011 increased reflecting the overall sales increase which was partially offset by a 3.9 percentage point reduction in the gross margin rate as a percentage of sales primarily reflecting reductions in the ATS and

Environmental Tectonics Corporation Announces First Quarter Fiscal 2011 Results		Page 2 of 3

simulation product areas.

Selling and marketing expenses decreased for the first quarter of fiscal 2011 primarily reflecting reduced bid and proposal expenses and reduced commissions on the mix shift in sales to U.S. Government sales. General and administrative expenses were down on lower spending for legal fees and bad debt expense. Research and development expenses increased as the prior quarter reflected higher grant funds from the Turkish Government. Interest expense reduced on lower bank borrowings and the Company’s July 2009 exchange of a $10 million convertible note for preferred stock. Other expense, net, up slightly, consisted primarily of bank and letter of credit fees as well as foreign currency exchange gains or losses. Due to the utilization of net operating loss carry forwards available the Company did not record an income tax expense on the income in the current fiscal quarter.

Liquidity and Capital Resources

The Company’s liquidity position and borrowing availability improved significantly during the first quarter of 2011. Cash flow from operations was a positive $8,244,000. Working capital (current assets less current liabilities) was $10,940,000 and the Company’s current ratio (current assets divided by current liabilities) was 1.72. The Company repaid over $5 million under its line of credit agreement and repurchased $1,000,000 of Series E Preferred Stock from H.F. Lenfest. The positive cash from operations primarily reflected the net income in the period and milestone payment collections under long term contracts. As of May 28, 2010, we had approximately $21.7 million of borrowing availability under our two lending facilities.

Backlog

Our sales backlog at May 28, 2010 and February 26, 2010, for work to be performed and revenue to be recognized under written agreements after such dates, was $91,928,000 and $96,964,000, respectively. Of the May 28, 2010 sales backlog, approximately $33,014,000 represents one international contract for multiple aircrew training simulators. Approximately 97% of the U.S. Government backlog represents two contracts.

Subsequent to fiscal quarter end, on June 12, 2010, we were awarded an additional $38.3 million contract by the U. S. Air Force to provide a suite of altitude chambers. This contract is not included in the above totals.

Commentary

William F. Mitchell, ETC’s President and Chairman, stated, “This financial report reflects the significant impact of numerous major contracts which were booked in the last 12 months. Awards have been received from the U.S. Navy and Air Force for state-of-the-art simulators and from a long time customer in Southeast Asia for multiple aircrew training simulators. Subsequent to fiscal quarter end, on June 12, 2010, we were awarded an additional $38.3 million contract by the U. S. Air Force to provide a suite of altitude chambers. This contract is not included in the first quarter’s summary.

“The impact of our positive cash flow from operations and availability under our lines cannot be underestimated. Multi-year long-term contracts require significant cash outlays during certain phases of execution. A growing company requires cash to expand its operation. I am very encouraged that ETC is finally benefiting from our many years of product development and engineering innovation.”

ETC designs, develops, installs and maintains aircrew training systems (aeromedical,
tactical combat and general), disaster management training systems and services, entertainment
products, sterilizers (steam and gas), environmental testing products, hyperbaric chambers and
related products for domestic and international customers.

This press release includes forward-looking statements within the meaning of Section 27A of the
Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as
amended. These forward-looking statements are based on ETC’s current expectations and projections
about future events. These forward-looking statements are subject to known and unknown risks,
uncertainties and assumptions about ETC’s and its subsidiaries that may cause actual results,
levels of activity, performance or achievements to be materially different from any future
results, levels of activity, performance or achievements expressed or implied by these
forward-looking statements.

These forward-looking statements include statements with respect to the Company’s vision,
mission, strategies, goals, beliefs, plans, objectives, expectations, anticipations, estimates,
intentions, financial condition, results of operations, future performance and business of the
company, including but not limited to, (i) potential additional funding by Lenfest, (ii) the
potential delisting of the Company’s common stock from the American Stock Exchange as a result of
the Company’s failure to comply with the AMEX listing standards, (iii) projections of revenues,
costs of materials, income or loss, earnings or loss per share, capital expenditures, growth
prospects, dividends, capital structure, other financial items and the effects of currency
fluctuations, (iv) statements of our plans and objectives of the Company or its management or Board
of Directors, including the introduction of new products, or estimates or predictions of actions of
customers, suppliers, competitors or regulatory authorities, (v) statements of future economic
performance, (vi) statements of assumptions and other statements about the Company or its business,
(vii) statements made about the possible outcomes of litigation involving the Company; (viii)
statements regarding the Company’s ability to obtain financing to support its operations and other
expenses, and (ix) statements preceded by, followed by or that include the words, “may,” “could,”
“should,” “looking forward,” “would,” “believe,” “expect,” “anticipate,” “estimate,” “intend,”
“plan,” or the negative of such terms or similar expressions. These forward-looking statements
involve risks and uncertainties which are subject to change based on various important factors.
Some of these risks and uncertainties, in whole or in part, are beyond the Company’s control.
Factors that might cause or contribute to such a material difference include, but are not limited
to, those discussed in the Company’s Annual Report on Form 10 K for the fiscal year ended February
29, 2008, in the section entitled “Risks Particular to Our Business.” Shareholders are urged to
review these risks carefully prior to making an investment in the Company’s common stock.

Environmental Tectonics Corporation Announces First Quarter Fiscal 2011 Results		Page 3 of 3

The Company cautions that the foregoing list of important factors is not exclusive. Except as
required by federal securities law, the Company does not undertake to update any forward-looking
statement, whether written or oral, that may be made from time to time by or on behalf of the
Company.

Contact: Duane D. Deaner, CFO     Tel: 215-355-9100 (ext.1203)     Fax: 215-357-4000    
http://www.etcusa.com