Shivram M. Krishnan

ARD, Inc. operates as an international development services consulting firm. The firm provides water resources and infrastructure, agriculture and economic growth, environment and natural resources, land tenure and property rights, democracy, governance and knowledge management services to international development customers. The company was founded by George C. Burrill and James R. Nolfi in 1977 and is headquartered in Burlington, VT.

Tetra Tech NUS, Inc. provides environmental, engineering, remediation and information technology consulting services. The company is headquartered in Pittsburgh. PA.

Part of Tetra Tech, Inc., Coffey UK Ltd. is an investment holding company. The company is based in Reading, UK. Coffey was founded in 2006.

Part of Tetra Tech, Inc., Coffey International Development Ltd. is a British company that provides development consultancy services. The company is based in Reading, UK. Coffey International Development was acquired by Tetra Tech Coffey Pty Ltd., part of Tetra Tech, Inc. from 2016-03-09 on 2006-03-06 for $6.13 million.

Tetra Tech India Ltd. engages in the provision of consulting, engineering, program management, and construction management services. The company was founded on April 4, 2017 and is headquartered in New Delhi, India.

Tetra Tech Tesoro, Inc. provides construction services. It also build schools, hospitals, and clinics for selected commercial and private clients. The company was founded on June 4, 1997 and is headquartered in Virginia Beach, VA.

Tetra Tech UK Holdings Ltd. is a holding company, which engages in the provision of environmental engineering, technical, and consulting services. The company was founded on August 17, 2006 and is headquartered in Reading, the United Kingdom.

GeoTrans, Inc. provides environmental engineering and remediation services. It serves the automotive, aerospace, manufacturing, energy, petrochemical, transportation, and telecommunication industries. The company was founded in 1979 and is located in Sterling, VA.

Part of Tetra Tech, Inc., Hoare Lea Europe Ltd. is a British company founded in 2008 that is committed to making every client's vision a reality. The company is based in Almondsbury, UK. The company takes personal responsibility to achieve a shared vision and have the expertise, determination, and ingenuity to make it happen.

Part of Tetra Tech, Inc., Tetra Tech Canada, Inc. is a Canadian company that provides consulting engineering, program management, construction management and technical services. The company is based in Vancouver, Canada.

Advanced Management Technology, Inc. provides information technology and program management solutions. It offers project management, performance-based navigation technical support and technical consulting services. The company was founded in 1987 and is headquartered in Arlington, VA.

Professional Services Council is a non-profit company that provides policy leadership, advocacy, business intelligence, executive networking, and branding and exposure services to its members since 1972. The company is based in Arlington, VA and has subsidiaries in the United States. The company's recent activities include submitting comments on CISA's draft secure software common attestation form, signing comments on rare earth element rule, and releasing its fifth annual federal business forecast scorecard. The company also offers various events and resources for government contracting. The company's CEO is David J. Berteau, who has been in the position since 2016.