Tetra Tech Awarded $60 Million Environmental Services Contract for U.S. Coast Guard

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it was awarded a $60 million contract with the U.S. Coast Guard (USCG) for professional architect-engineering environmental services. Under this five-year, multiple-award contract, Tetra Tech will provide services in support of USCG environmental compliance, restoration and environmental liabilities, planning, and sustainability programs. Services will be performed at both onshore and offshore structures, including navigational aids such as lighthouses, in the United States and its territories, and any other location where the USCG may have a mission interest.

Tetra Tech has provided similar environmental services to the USCG for more than 20 consecutive years through multiple contracts that include all branches of the USCG, including its Civil Engineering Units, Facilities Design and Construction Centers, Shore Infrastructure Logistics Centers and Headquarters.

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.