Mickhael Robert George Cook

RPS Group Ltd. engages in the provision of environmental consultancy services for infrastructure, urban growth, energy, mining, and natural resource management. It operates through the following business segments: Energy, Consulting-Unites Kingdom and Ireland, Services-United Kingdom and Netherlands, Norway, North America and Australia Asia Pacific. The company was founded in 1970 and is headquartered in Abingdon, the United Kingdom.

SLR Consulting Ltd. engages in the provision of environmental and advisory solutions to financial services, infrastructure, mining and minerals, oil and gas, and power sectors. Its services include advisory and transaction services; engineering; environmental management, planning and approvals; environmental specialist services; and land and water. The company was founded by David Graham Richards and Alan Sheppard in 1994 and is headquartered in Aylesbury, the United Kingdom.

Part of Tetra Tech, Inc., Hydrosearch Associates Ltd. is a British company that provides geological and other environmental services and consultancy to the energy sector. The company is based in Woking, UK. Hydrosearch Associates was acquired by RPS Group Plc, part of Tetra Tech, Inc. from January 23, 2023 on September 24, 2003 for $24.88 million.

SLR Management Ltd. provides environmental consultancy services. The company was founded on March 18, 2008 and is headquartered in Aylesbury, the United Kingdom.