Tetra Tech, Inc. (NASDAQ: TTEK) announced today it has been awarded a $216 million indefinite delivery indefinite quantity contract from the U.S. Agency for International Development (USAID) to support the implementation of USAID’s program, the Promoting Gender Equity in National Priority Programs Project (PROMOTE) in Afghanistan. USAID has committed $216 million, and other donors can contribute up to an additional $200 million. PROMOTE represents a commitment by the U.S. Government and Afghan Government to solidify the gains made by Afghan women over the last decade. The objectives of PROMOTE will continue the previous investment to educate young women, helping them to become decision-makers and leaders during this next critical transformation phase in Afghanistan.

Under this multiple-award contract, Tetra Tech has won the first task order for $42 million to support women’s leadership development within Afghanistan’s largest cities which will serve as hubs to reach out to many eligible beneficiaries in all Afghan provinces. Tetra Tech and its Afghan partners will support USAID to enable Afghan women to acquire, and over time, apply advanced management and leadership skills in public, private and civil service sectors careers.

About Tetra Tech (www.tetratech.com)

Tetra Tech is a leading provider of consulting, engineering, program management, and construction management services. The Company supports commercial and government clients focused on water, environment, infrastructure, resource management, and energy. With 14,000 staff worldwide, Tetra Tech provides clear solutions to complex problems.

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.