USAID Awards Tetra Tech $125 Million Architect-Engineer Services Contract

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the U.S. Agency for International Development (USAID) has awarded the Company a $125 million, single-award contract to provide comprehensive architecture-engineering services to USAID/Afghanistan. Under the five-year Engineering Support Program (ESP), Tetra Tech will provide engineering services, construction oversight, and quality assurance assistance to successfully implement USAID’s infrastructure design and construction activities.

Improvements to Afghanistan’s infrastructure are ongoing, as the country addresses a lack of regular maintenance, and limited investment in physical infrastructure. Tetra Tech will provide engineering expertise to support USAID’s activities in water and sanitation, energy, and infrastructure in the region.

“Tetra Tech has provided the USAID/Afghanistan Mission with architecture-engineering services for the past seven years,” said Dan Batrack, Tetra Tech’s Chairman and CEO. “We are pleased to continue providing infrastructure support to help USAID promote a more stable and prosperous future for Afghanistan.”

About USAID

With almost $17 billion spent on development programs in Afghanistan since 2002, USAID provides the largest bilateral civilian assistance program to Afghanistan. USAID partners with the government and people of Afghanistan to ensure economic growth led by the country’s private sector, establish a democratic and capable state governed by the rule of law, and provide basic health and education services for all Afghans. For more information, please visit: usaid.gov/afghanistan.

About Tetra Tech

Tetra Tech is a leading provider of consulting and engineering services. For 50 years, the Company has supported commercial and government clients focused on water, environment, infrastructure, resource management, energy, and international development. With 16,000 staff worldwide, Tetra Tech provides clear solutions to complex problems. For more information about Tetra Tech, please visit tetratech.com, follow us on Twitter (@TetraTech), or like us on Facebook.

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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