Tetra Tech, Inc. announced that on November 6, 2017, Ronald J. Chu retired from his role as Tetra Tech's Executive Vice President. Effective November 6, 2017, the following new executive officers were appointed by the Board of Directors: Derek G. Amidon, Senior Vice President and President of the Commercial Account Management Division of CIG. Mr. Amidon, age 50, has served as a project manager, key account manager, operations manager, and regional manager since joining Tetra Tech in 2012. Roger R. Argus, Senior Vice President of GSG and President of the U.S. Government Division of GSG. Mr. Argus is a chemical engineer with 33 years of experience, including 25 years with Tetra Tech, in operational leadership, program and project management, and quality assurance for projects encompassing a broad spectrum of environmental, engineering, and emergency management services. Mr. Argus has also been responsible for managing multidisciplinary contracts and projects in support of the U.S. federal government, state and municipal agencies, and private clients nationwide. Jan K. Auman, Senior Vice President and President of the Global Development Services Division of GSG. Mr. Auman has over 40 years of experience managing large, complex international development and technical assistance operations, having served 10 years with the United States federal government and 30 years in the private sector. Mark A. Rynning, Senior Vice President and President of the U.S. Infrastructure Division of GSG. Mr. Rynning has more than 30 years of experience in the engineering consulting industry, including 27 years with Tetra Tech. Bernard Teufele, Senior Vice President and President of the Canada and South America Division of CIG. Mr. Teufele has over 22 years of consulting engineering experience as a leader of a highly diversified, high-end infrastructure practice and as a technical expert in the field of infrastructure monitoring and asset management. Prior to his current role, Mr. Teufele has managed operating units of increasing size and complexity with a primary focus on infrastructure, environmental sciences, civil transportation, and mining-related services doing work for municipal, provincial, and federal government clients in Canada. In addition to these appointments, effective November 6, 2017, Leslie L. Shoemaker, the former Executive Vice President and President of Water, Environment and Infrastructure, was named Executive Vice President, Operations and President of CIG.
Tetra Tech, Inc. is a global provider of consulting and engineering services that is focused on water, environment, sustainable infrastructure, renewable energy and international development. The Company is Leading with Science to provide solutions for its public and private clients. The Company operates through its two segments: government services group (GSG) and commercial/international services group (CIG). Its GSG segment provides consulting and engineering services primarily to United States (U.S.) government clients and development agencies worldwide. The Company's CIG segment primarily provides consulting and engineering services to U.S. commercial clients and international clients that include both commercial and government sectors. Its CIG segment provides sustainable infrastructure and related environmental, engineering and project management services to commercial and local government clients across Canada, in Asia Pacific, the United Kingdom, as well as Brazil and Chile.
TETRA TECH, INC. 
