The Geotechnical Consulting Group LLP (GCG) was founded in 1983 by Lord Professor Robert Mair, Professor David Hight and the late Professor Peter Vaughan to provide geotechnical consulting services employing state of the art research and developments in our understanding of soils and rock. GCG has established a reputation for developing innovative geotechnical solutions to technically demanding engineering problems, and is widely recognised as one of the world's leading independent geotechnical consultants. Our capabilities draw on the latest developments in engineering theory, research and practice from around the world.


We are an independent company owned by its members, providing expert advice to a wide range of  clients including consultants, contractors, government departments and agencies, private and public companies, legal practices and research organisations.

Industry leaders

Our People

GCG staff serve on professional and specialist committees and are closely involved in implementing new methods of design and analysis.


GCG has provided five past Rankine lecturers, one Glossop lecturer, several Chairpersons of the British Geotechnical Association and the Institution of Civil Engineers' Ground Board. Its founding director Robert Mair is the current President of the ICE. Members of GCG have published hundreds of technical papers and over 20 major state-of-the-art reviews.


GCG are members of the Association of Geotechnical & Geoenvironmental Specialists, AGS and are core members of  the Construction Industry Research and Information Association, CIRIA. Our members and associates  regularly participate in workshops, and are actively involved in developing industry best practice guidance for geotechnical issues.


GCG operates an effective and efficient quality and environmental management system, planned and developed in conjunction with other management functions.


GCG’s management system has been assessed and approved, by a UKAS Accredited Certification Body, as meeting the requirements of BS EN ISO 9001: 2015 and BS EN ISO 14001: 2015.

University partnerships

GCG maintains close contact with major universities throughout the world, notably with Imperial College, Cambridge, City, Oxford, Bristol, Barcelona and Tokyo Universities and the National Technical University, Singapore.


Our Members have been appointed Professors and Visiting Professors at leading international universities, lecture to university groups and undertake collaborative research projects.

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Privacy Statement

Geotechnical Consulting Group LLP is a partnership registered in England No OC356005 and whose registered office is 52A Cromwell Road, London SW7 5BE.