TETRA TECH INC

For the period ended Sep 28, 2025. Filed Nov 20, 2025.

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FY2025 · Filed Nov 20, 2025

TTEK$40.65-1.1%Stored close · as of Nov 10, 2026

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Executive Officers of the Registrant

The following table shows thename, age and position of each of our executive officers as of November 20, 2025:

Name	Age	Position
Dan L. Batrack	67	Chairman and Chief Executive Officer
Mr. Batrack joined our predecessor in 1980 and was named Chairman in January 2008. He has served as our Chief Executive Officer and a director since November 2005, and as our President from October 2008 to September 2019. Mr. Batrack has served in numerous capacities over the last 40 years, including arctic research scientist, deep water oceanographic hydrographer, coastal hydrodynamic modeler, environmental data analyst, project and program manager, President of the Engineering Division, and in 2004 he was appointed Chief Operating Officer. He has managed complex programs for many small and Fortune 500 clients, both in the United States and internationally. Mr. Batrack holds a B.A. degree in Business Administration from the University of Washington.
Roger R. Argus	64	President
Mr. Argus was appointed President in October 2025. He served as Executive Vice President, Corporate Development from November 2024 to October 2025, and President, Commercial/International Services Group from October 2023 to October 2025. Prior to this, Mr. Argus served as Senior Vice President and President, Government Services Group from October 2018 to October 2024, and President, U.S. Government Division from October 2017 to November 2024. He is a chemical engineer with 40 years of experience, including over 30 years with us in operational leadership, program and project management and quality assurance for projects encompassing a broad spectrum of environmental, engineering, information technology and disaster management services. Mr. Argus holds a B.S. in Chemical Engineering from California State University, Long Beach.
Steven M. Burdick	61	Executive Vice President, Chief Financial Officer
Mr. Burdick has served as our Executive Vice President, Chief Financial Officer since April 2011. He served as our Senior Vice President, Corporate Controller and Chief Accounting Officer from January 2004 to March 2011. Mr. Burdick joined us in April 2003 as Vice President, Management Audit. Previously, Mr. Burdick served in senior financial and executive positions with Aura Systems, Inc., TRW Ventures, and Ernst & Young LLP. Mr. Burdick holds a B.S. degree in Business Administration from Santa Clara University and is a Certified Public Accountant.

Name	Age	Position
Preston Hopson	49	Executive Vice President, Chief Legal and Human Capital Officer and Secretary
Mr. Hopson was appointed Executive Vice President, Chief Legal and Human Capital Officer in November 2024, having served as Senior Vice President, General Counsel and Secretary to the Board of Directors since January 2018. He also serves as the Chief Ethics and Compliance Officer. Previously, Mr. Hopson served as Vice President, Assistant General Counsel and Assistant Corporate Secretary at AECOM. Prior to this, he was a corporate and securities lawyer at O’Melveny & Myers LLP and also worked at the U.S. Court of Appeals. Mr. Hopson holds B.A. and J.D. degrees from Yale University.
Leslie Shoemaker	68	Executive Vice President, Chief Innovation and Sustainability Officer
Dr. Shoemaker currently serves as Executive Vice President, Chief Innovation and Sustainability Officer focused on the advancement of Tetra Tech Delta technologies, development and deployment of our subscription software offerings, and company-wide technology innovation programs. Dr. Shoemaker joined us in 1991, and has served in various management capacities, including Tetra Tech President, Chief Strategist, business group president, and water resources project manager. Her technical expertise is in development models and data analytics that leverage emerging technologies to optimize the management of large-scale complex watersheds. Since the inception of our sustainability program in 2010, she has served as Chief Sustainability Officer leading the formation and evolution of the program. Dr. Shoemaker holds a B.A. in Mathematics from Hamilton College, a Master of Engineering from Cornell University and a Ph.D. in Agricultural Engineering from the University of Maryland. She was inducted into the United States' National Academy of Engineers in 2022.
Brian N. Carter	58	Senior Vice President, Corporate Controller and Chief Accounting Officer
	Mr. Carter joined us as Vice President, Corporate Controller and Chief Accounting Officer in June 2011 and was appointed Senior Vice President in October 2012. Previously, Mr. Carter served in finance and auditing positions in private industry and with Ernst & Young LLP. Mr. Carter holds a B.S. in Business Administration from Miami University and is a Certified Public Accountant.

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