Tetra Tech Awarded $46 Million Multiple-Award USACE Architect-Engineer Services Contract

Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services in water, environment, and sustainable infrastructure, announced today that the U.S. Army Corps of Engineers (USACE) Los Angeles District awarded the Company a multiple-award contract not to exceed $46 million.

Under the 3-year contract, Tetra Tech will provide comprehensive engineering and design services to support a wide range of essential projects, including civil and military infrastructure, coastal and port facility development and improvements, dam and levee safety assessments and improvements, inland flood control design and implementation, and emergency operations support for flood and earthquake response activities.

“Tetra Tech is pleased to continue our long history of delivering innovative and sustainable engineering solutions for the USACE Los Angeles District,” said Dan Batrack, Tetra Tech Chairman and CEO. “Our technical leadership and experience addressing complex engineering challenges position us to deliver exceptional value to our client and its stakeholders.”

About Tetra Tech

Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With 30,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science^® to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn and 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 Form 10-Q filings with the Securities and Exchange Commission.

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