Investor Presentation

October 2021

WATER

ENVIRONMENT

SUSTAINABLE INFRASTRUCTURE

RENEWABLE ENERGY

Forward Looking Statements &

Non-GAAP Financial Measures

Certain statements contained in this presentation are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements involve risks and uncertainties, such as those related to fluctuations in the Company's quarterly

operating results and stock price, and the other risks detailed from time to time in the Company's SEC reports.

To supplement the financial results presented in accordance with generally accepted accounting principles in the United States ("GAAP"), we present certain non-GAAP financial measures within the meaning of Regulation G under the Securities Exchange Act of 1934, as amended. We provide these non-GAAP financial measures because we believe they provide a valuable perspective on our financial results. However, non-GAAP measures have limitations as analytical tools and should not be considered in isolation and are not in accordance with, or a substitute for, GAAP measures. In addition, other companies may define non-GAAP measures differently which limits the ability of investors to compare non-GAAP measures of Tetra Tech to those used by our peer companies. A reconciliation of these non-GAAP financial measures to the most directly comparable GAAP financial measures is available at investor.tetratech.com.

2

Our Business: Leading with Science®

2020: $3.0B Revenue

17,000 Clients | 65,000 Projects

450 OFFICES WORLDWIDE | 21,000 ASSOCIATES

Water

Environment

Sustainable Infrastructure

Renewable Energy

PREMIER GLOBAL CONSULTING AND ENGINEERING FIRM

3

Industry Rankings: Leading Market Positions

Water

Environmental

Desalination

Wind

Management

#1

#1

#1

#1

18 years in a row

13 years in a row

7 years in a row

6 years in a row

International

High Performance

Renewable

Development

Buildings

Energy

4

Leader in

ESG Programs

Kentucky Water Optimization

  • Cost savings of $200M
  • Prevented 2 billion gallons of contaminated water from entering river

Clean Energy Central Asia

  • Secure and sustainable energy to benefit 72 million people

Coral Triangle Sustainable

Ecosystem Program

  • Long term protection of sustainable fisheries and ecosystem essential to livelihood of 360 million people

Chesapeake Bay Restoration

  • Ecosystem protection of the largest U.S. estuary
  • 64,000 square-mile watershed; 18 million people

Wisconsin River Recovery

• 7.5 million cubic yards of PCB contaminated sediment removed

Colombia Land Rights

• Providing legal land titles to 20,000 rural landowners, including 10,000 women landowners

Jordan Rule of Law Program

  • Improving protections for human and legal rights in Jordan for
    10 million people

5

This is an excerpt of the original content. To continue reading it, access the original document here.

Attachments

  • Original document
  • Permalink

Disclaimer

Tetra Tech Inc. published this content on 08 October 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 08 October 2021 17:01:03 UTC.