Tetra Tech Wins $49M USAID Biodiversity and Climate Change Contract

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the U.S. Agency for International Development (USAID) has awarded the Company a $49 million single-award contract to promote climate-resilient communities and protect biodiversity in West Africa.

West African countries are particularly vulnerable to the effects of urbanization, overfishing, and increased risk of floods in coastal areas. The region’s inland forests are also threatened by conversion to agricultural use and unsustainable land-use practices.

Under the five-year West Africa Biodiversity and Climate Change project, Tetra Tech will collect and disseminate critical data sets, increase the capacity of resource agencies to interpret data for more informed decision making, and develop sustainable best practices that can be shared across the region.

Tetra Tech will work with partners at the regional, national, and community levels to strengthen policies that will improve natural resource management and the health of marine ecosystems in West Africa. “Tetra Tech is pleased to continue supporting USAID in providing innovative solutions to address the impacts of climate change around the world,” said Dan Batrack, Tetra Tech’s Chairman and CEO.

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 13,000 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.

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Tetra Tech, Inc.Jim Wu, Investor RelationsCharlie MacPherson, Media & Public Relations(626) 470-2844