Tetra Tech Wins $500 Million Multiple-Award USAID Worldwide Rule Of Law Contract

Tetra Tech, Inc. (NASDAQ: TTEK) announced today it has been awarded a $500 million indefinite quantity contract to provide rule of law technical assistance globally to the U.S. Agency for International Development (USAID).

Tetra Tech will help USAID address its priorities to strengthen democracy and governance worldwide by promoting order and security, justice sector management and service delivery, judicial independence, access to justice, human rights protection, citizen engagement in rule of law issues, and legal assistance and public legal awareness.

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 14,000 staff 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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