Tetra Tech : Report of unscheduled material events or corporate event

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

September 30, 2019

TETRA TECH, INC.

(Exact name of registrant as specified in its charter)

Delaware	0-19655	95-4148514
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification Number)
	3475 East Foothill Boulevard, Pasadena, California 91107
	(Address of principal executive office, including zip code)
	[phone]
	(Registrant's telephone number, including area code)
	Not Applicable
	(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

• Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
• Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
• Pre-commencementcommunications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
• Pre-commencementcommunications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading symbol(s)		Name of each exchange on which registered
Common Stock, $0.01 par value		TTEK		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging Growth Company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Appointment of Officer

Effective September 30, 2019, Dr. Leslie L. Shoemaker, Executive Vice President, Operations and President of the Commercial/International Services Group of Tetra Tech, Inc. (the "Company"), has been promoted to serve as the Company's President, reporting to Dan L. Batrack, Chairman and Chief Executive Officer. In this role, Dr. Shoemaker will lead the Company's strategic planning and operating segments.

Item 8.01. Other Events.

On September 30, 2019, the Company issued a press release announcing the appointment of Dr. Leslie L. Shoemaker as President. The press release is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference into this Item 8.01.

Item 9.01. Financial Statements and Exhibits.

1. Exhibits

99.1 Press Release of Tetra Tech, Inc., dated September 30, 2019.

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Tetra Tech has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	TETRA TECH, INC.
Date: September 30, 2019	By: /s/ DAN L. BATRACK
		Dan L. Batrack
		Chairman and Chief Executive Officer
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Exhibit 99.1

NEWS RELEASE

September 30, 2019

Tetra Tech Announces Executive Appointments

Pasadena, California. Tetra Tech, Inc. (NASDAQ: TTEK) announced today the promotion of Dr. Leslie Shoemaker to President. In this role she will lead our strategic planning and operating segments.

Dr. Shoemaker joined Tetra Tech 28 years ago, and has held increasingly responsible positions including project manager, chief strategy officer, and most recently executive vice president and business segment president. She has been instrumental in leading our growth strategies that have supported Tetra Tech's expansion over the past decade from a U.S. business to the global operations we are today. She obtained her Ph.D. in Agricultural Engineering from University of Maryland, Master of Engineering from Cornell University, and majored in Mathematics for her undergraduate degree at Hamilton College.

"Dr. Shoemaker is highly qualified to lead our operations in the further expansion of our market-leading water and environment solutions and advanced analytics

practice. She exemplifies Tetra Tech's Leading with Science® approach, with her ability to build high performing interdisciplinary teams, and expertise in advanced analytics and innovative water modeling of large-scale systems," said Dan Batrack, Tetra Tech CEO and Chairman.

"Tetra Tech has tremendous opportunities as we enter the 2020 fiscal year, to address some of today's most challenging problems: adapting to a changing climate, and providing for essential water, environment and infrastructure. Our scientists and engineers build on a legacy of analytics, empowered by today's most advanced technology. I look forward to further developing our highly talented group of professionals to support our clients' needs," said Dr. Shoemaker.

Additionally, Mr. Derek Amidon has been promoted to lead the Commercial International Services Group (CIG), one of our two business segments, in addition to his current role as President of the Commercial Account Management Division. He brings to this role significant experience in the design and implementation of environmental restoration programs and support of our Fortune 100 client accounts in the commercial sector. Most recently he has led the successful integration of the acquisition of the United Kingdom based WYG.

About Tetra Tech

Tetra Tech is a leading provider of high-end consulting and engineering services for projects worldwide. With 20,000 associates working together, Tetra Tech provides clear solutions to complex problems in water, environment, infrastructure, resource management, energy, and international development. We are Leading

with Science® to provide sustainable and resilient solutions for our clients. For more information about Tetra Tech, please visittetratech.com, follow us on Twitter (@TetraTech), or like us on Facebook.

3475 E. Foothill Boulevard, Pasadena, CA 91107 Tel [phone] | Fax [phone] | www.tetratech.com

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 Form 10-Q filings with the Securities and Exchange Commission.

CONTACTS:

Jim Wu, Investor Relations

Charlie MacPherson, Media & Public Relations [phone]

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