Danny Batrack

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 Coffey Pty Ltd. engages in the provision of geotechnical, environmental, testing, and project management services. It serves mining, oil and gas, property infrastructure and transport infrastructure industries. The company was founded by David Coffey in 1959 and is headquartered in Chatswood, Australia.

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 NDY (UK) Ltd., NDY Consulting Ltd. is a consulting engineering company based in London, UK. The British company specializes in developing BIM execution plans, data manipulation, and modeling for various applications. The company also provides sustainable engineering solutions to improve the value, reliability, and efficiency of their clients' projects. NDY Consulting has expertise in designing audio-visual solutions and can undertake modeling to illustrate how sound will pass through proposed spaces. The CEO of the company is Allen John Williamson.

Part of Tetra Tech, Inc., Coffey Geotechnics Ltd. provides geo-technical, environmental, mining and civil engineering consulting services. The company is based in Reading, UK.

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.