USAID Awards Tetra Tech $24 Million Contract to Strengthen Clean Energy Services in Central Asia

PASADENA, Calif.–(BUSINESS WIRE)–Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the U.S. Agency for
International Development (USAID) has awarded the Company a $24 million
indefinite delivery indefinite quantity Power the Future Activity
Contract to help governments of Central Asia accelerate the development
and deployment of clean energy throughout the region.

Under the four-year contract, Tetra Tech will support USAID and its
Central Asian country partners to strengthen the capacity of these
countries to provide sustainable energy services that are competitive
with the wholesale and retail electricity prices that are common
throughout the region. Tetra Tech will also provide technical services,
including conducting pilot studies for the scaling up of renewable
energy practices across the region, developing innovative approaches to
increase the integration of sustainable energy grid connections, and
developing regulations to promote increased investment in renewable
energy and energy efficiency measures.

“Tetra Tech is pleased to continue to support USAID’s efforts to improve
access to clean energy in developing countries,” said Dan Batrack, Tetra
Tech’s Chairman and CEO.

About Tetra Tech

Tetra Tech is a leading provider of consulting and engineering services
differentiated by Leading with Science® in
providing innovative technical solutions to our clients. We support
global commercial and government clients focused on water, environment,
infrastructure, resource management, energy, and international
development. With 16,000 associates worldwide, Tetra Tech provides clear
solutions to complex problems. 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 10-Q filings with the Securities and Exchange
Commission.

Contacts

Tetra Tech, Inc.
Jim Wu, Investor Relations
Charlie
MacPherson, Media & Public Relations
(626) 470-2844