Tetra Tech Announces Planned Dates for Third Quarter 2018 Results and Conference Call

PASADENA, Calif.–(BUSINESS WIRE)–Tetra Tech, Inc. (NASDAQ: TTEK) announced today the planned dates for
its third quarter 2018 results and conference call. On Wednesday, August
1, 2018, after market close, Tetra Tech intends to announce its third
quarter 2018 results. On Thursday, August 2, 2018, at 8:00 a.m. Pacific
Time, Tetra Tech plans to host a conference call to further present and
discuss the Company’s financial results and forward outlook.

Investors and other interested parties can access a live audio-visual
webcast through a link posted on the Company’s website at tetratech.com/investors.
The webcast replay will be available following the call.

About Tetra Tech

Tetra Tech is a leading, global provider of consulting and engineering
services. We are differentiated by Leading with Science®
to provide 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 17,000 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