Tetra Tech To Present At Three Investor Conferences In September

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that Company executives will deliver presentations to investors at the following investor conferences in September:

D.A. Davidson Engineering & Construction Conference, San Francisco, CATuesday, September 11, 2012Presenter: Steve Burdick, Executive Vice President and Chief Financial Officer

Brean Murray European Global Resources & Infrastructure Conference, London, UKWednesday, September 12, 2012Presenter: Dan Batrack, Chairman and Chief Executive Officer

Wedbush Clean Technology and Industrial Growth Conference, San Francisco, CAWednesday, September 12, 2012Presenter: Steve Burdick, Executive Vice President and Chief Financial Officer

A copy of the presentation slides will be available under the Investor Relations section on the Company’s website at www.tetratech.com.

About Tetra Tech ( www.tetratech.com)

Tetra Tech is a leading provider of consulting, engineering, program management, construction management, and technical services. The Company supports government and commercial clients by providing innovative solutions to complex problems focused on water, environment, energy, infrastructure, and natural resources. With more than 13,000 employees worldwide, Tetra Tech’s capabilities span the entire project life cycle.

Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions ("Future Factors"), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section "Risk Factors" included in the Company’s Form 10-K and 10-Q filings with the Securities and Exchange Commission.

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