Tetra Tech Awarded $90 Million U.S. Air Force Environmental Services Contract

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the U.S. Air Force has awarded the Company a $90 million, multiple-award contract to provide comprehensive environmental engineering support services to installations throughout Europe and Africa. The period of performance is 10 years.

Under this contract, Tetra Tech will provide technical support services to the U.S. European Command and the U.S. Africa Command for conservation, compliance, pollution prevention, remediation, and operations and maintenance activities. Tetra Tech will conduct risk assessments, perform advanced data analytics, and prepare remedial designs to support environmental programs including air, drinking water, wastewater, stormwater, solid waste, and hazardous substance/waste management. We will incorporate sustainability elements such as energy efficiency, water conservation, and renewable energy into project designs.

“Tetra Tech has supported the Air Force’s environmental restoration mission in Europe since 2002 from our European Center of Excellence based in Rodenbach, Germany,” said Dan Batrack, Tetra Tech’s Chairman and CEO. “Through our Leading with Science® approach, we will continue using the latest tools and technologies to address the Air Force’s most critical environmental needs.”

About Tetra Tech

Tetra Tech is a leading provider of high-end consulting and engineering services for projects worldwide. With 20,000 associates working together, Tetra Tech provides clear solutions to complex problems in water, environment, infrastructure, resource management, energy, and international development. We are Leading with Science® to provide sustainable and resilient solutions for our clients. 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 Form 10-Q filings with the Securities and Exchange Commission.