Tetra Tech Acquires Nuclear Services Firm Haselwood Enterprises

Tetra Tech, Inc. (NASDAQ:TTEK) announced today that it has acquired Haselwood Enterprises, Inc. (HEI), a nuclear science and engineering company. HEI has annual revenue of approximately $14 million. The acquisition will enhance Tetra Tech’s capabilities and service offerings for the National Nuclear Security Administration (NNSA), commercial nuclear and the U.S. Department of Energy (DOE). HEI provides program management and technical services for nuclear materials management, nuclear weapons complex operations and infrastructure, environmental remediation, and waste management. HEI will be led by Greg Rudy, who formerly managed the Savannah River Site in Aiken, South Carolina for DOE.

Tetra Tech’s Chairman and CEO Dan Batrack stated, "This acquisition is evidence of our focus on serving the NNSA, DOE, and commercial nuclear markets, which we believe will provide a strong foundation for our commitment to the alternative energy market.”

HEI has about 120 employees and is headquartered in Oak Ridge, Tennessee, with additional offices close to the DOE’s Portsmouth, Ohio and Paducah, Kentucky sites. The terms of the acquisition were not disclosed.

About Tetra Tech (www.tetratech.com)

Tetra Tech is a leading provider of consulting, engineering, program management, construction and technical services addressing the resource management and infrastructure markets. The Company supports government and commercial clients by providing innovative solutions focused on water, the environment and alternative energy. With more than 8,500 associates located in the United States and internationally, Tetra Tech’s capabilities span the full 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.