泰特拉科技 TTEK

Mr. Dan L. Batrack, Experience: CEO and director since 2005; Chairman since 2008; President from 2008 to 2019. Joined Tetra Tech in 1980 and has served in numerous capacities, including arctic research scientist, deepwater oceanographic hydrographer, coastal hydrodynamic modeler, environmental data analyst, project and program manager, and President of the Engineering Division, and, in 2004, was appointed Chief Operating Officer. Established the firm's strategic direction and focus on Leading with Science to become the premier global consulting firm focused on water, environment, and sustainable infrastructure. Led research and engineering programs in locations in the Arctic and throughout South America, the Middle East, and the United States. Serves as corporate sponsor for several of our clients' programs and remains engaged in our day-to-day operations. BA, Business Administration, University of Washington. On January 6, 2026, Tetra Tech, Inc. announced that Mr. Batrack, currently Chairman and Chief Executive Officer, will continue as Executive Chairman of the Board of Directors. The changes are effective February 19, 2026.

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.

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.

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.

Mr. Argus is a chemical engineer with 39 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 has also been responsible for managing multidisciplinary contracts and projects in support of the U.S. federal government (i.e., U.S. Navy, the U.S. Army Corps of Engineers and the Environmental Protection Agency), state and municipal agencies and private clients nationwide. The scope of his technical experience includes planning and directing environmental programs, developing data acquisition, management and analytics solutions, fund research and development support for innovative environmental technologies and waste treatment systems, municipal resiliency and sustainability programs. Mr. Argus holds a B.S. in Chemical Engineering from California State University, Long Beach. On October 7, 2025, Tetra Tech, Inc. announced that Roger R. Argus, Executive Vice President, Corporate Development, and President, Commercial/International Services Group, has been promoted to serve as the Company's President. On January 6, 2026, Tetra Tech, Inc. announced that Roger R. Argus, currently President, will succeed as Chief Executive Officer and join the Company's Board of Directors. The changes are effective February 19, 2026.

Ms. Kirsten M. Volpi, EVP, COO, CFO, and Treasurer Colorado School of Mines, since 2013; Senior Vice President for Finance and Administration, CFO, and Treasurer, 2005-2011; Chief Administrative Officer, U.S. Olympic Committee, 2011-2013 and Various financial management roles for Rensselaer Polytechnic Institute, University of Colorado Foundation, and American Water Works Association. BS, Accounting, University of Colorado.

Mr. Birkenbeuel joined our Board in July 2018. Experience: Retired after 37 years with Ernst & Young LLP (E&Y). Former Regional Assurance Managing Partner, E&Y, 2003-2017. Served as the audit partner in charge of multinational publicly and privately held companies engaged in the aerospace and defense, entertainment, technology, and media industries. Director and chairman of the investment and audit committees, American Film Institute. BA, Economics, Claremont McKenna College.

on february 22 2022 tetra tech inc announced that prashant gandhi has been appointed to the board of directors of the company effective may 1 2022 experience chief business officer of melio payments since 2021 head of digital payments jp morgan chase 2017 2021 partner and global chief operating officer digital practice mc kinsey company 2000 2016 advisory board member university of minnesota s school of information decision sciences bs chemical engineering indian institute of technology delhi ms chemical engineering kansas state university mba university of chicago s booth school of business

Dr. Li-San Hwang has served as our honorary Chairman Emeritus since March 2006. As Chairman Emeritus, Dr. Hwang is invited to attend Board and Board committee meetings, but he does not have voting rights. Chairman Emeritus is an unpaid position. Dr. Hwang joined our predecessor in 1967 and led our acquisition of the Water Management Group of Tetra Tech from Honeywell Inc. in March 1988. He served as our CEO from our formation until November 2005. Dr. Hwang has served as an advisor to numerous government and professional society committees and has published extensively in the field of hydrodynamics. He is a graduate of the National Taiwan University, Michigan State University, and California Institute of Technology, holding BS, MS, and PhD degrees, respectively, in civil engineering, specializing in water resources.

On December 22, 2025, the Company announced that Jeffrey R. Feeler has been appointed to the Board of Directors of the Company, effective December 29, 2025. Mr. Feeler most recently served as the Chairman and Chief Executive Officer of US Ecology, where he led the company's transformation into a premier North American environmental services provider, from 2013 to 2022. He also served as US Ecology's Chief Operating Officer and Interim Chief Executive Officer from 2012 to 2013, Chief Financial Officer and Treasurer from 2007 to 2012, and Treasurer and Chief Accounting Officer from 2006 to 2007. He previously worked as Manager, Financial Reporting at MWI Veterinary Supply, Inc. from 2005 to 2006 and as Director, Financial Reporting at Albertsons, Inc. from 2003 to 2005. Mr. Feeler currently serves on the boards of Milestone Environmental and BTS Bioenergy. He is a Certified Public Accountant and holds a B.B.A. in Accounting and Finance from Boise State University.

On December 22, 2025, the Company announced that Ms. M. Susan Hardwick has been appointed to the Board of Directors of the Company, effective December 29, 2025. Ms. Hardwick most recently served as the Chief Executive Officer of American Water, the largest regulated water and wastewater utility in the United States, from 2022 to 2024. Prior to becoming CEO, she served as American Water's Chief Financial Officer from 2019 to 2022. She previously served in roles of increasing responsibility at Vectren Corporation, including Chief Financial Officer from 2014 to 2019, Senior Vice President, Finance from 2013 to 2014, and Controller from 2000 to 2013. Prior to joining Vectren, Ms. Hardwick was Assistant Corporate Comptroller at Cinergy Corp. from 1992 to 1999. She began her career in public accounting with Arthur Andersen. Ms. Hardwick currently serves on the board of New Jersey Resources Corporation, a public energy services company. She holds a B.S. in Accounting from Indiana University Bloomington.

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.