Richard Lemmon

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.

Tetra Tech Industries, Inc. provides consulting engineering, program management, construction management, and technical services. The firm offers services for water, environmental, energy, infrastructure, and mining and industrial sectors. It helps keep the country running through improvements in electrical and wind power, oil and gas, ports and harbors, roads and bridges, public health and research facilities, and municipal, industrial, and waste management infrastructure. The company is headquartered in Montreal, Canada.

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

Part of Tetra Tech, Inc., Coffey International Development Ltd. provides development consultancy services. The private company is based in Reading, UK. Coffey International Development was acquired by Tetra Tech Coffey Pty Ltd., part of Tetra Tech, Inc. from March 09, 2016 on March 06, 2006 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.