Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it signed a multiple-award contract with a $243 million ceiling to support the National Guard Bureau. Tetra Tech will provide Environmental Engineering Professional and Technical Support Services at various Air National Guard and the Army National Guard bases within the continental United States and surrounding territories. The contract includes one base year and two option years. Tetra Tech will support the National Guard Bureau in providing a full range of environmental services including assessment, restoration and clean up, compliance and pollution prevention, and natural and cultural resources activities. 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.