Who we are

GCG Celebrates 40 Year Milestone!

GCG is one of world’s leading geotechnical consultancy and engineering firms.

We have established a reputation for developing innovative geotechnical solutions to technically demanding engineering problems.

Our talented team draws on the latest developments in engineering theory, research and practice from around the world in providing innovative solutions to our client’s engineering problems.

The Geotechnical Consulting Group LLP (GCG) was founded in 1983 by Professor Lord 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.

We are an independent specialist business providing expert geotechnical consultancy advice to a wide range of clients including consultants, contractors, government departments and agencies, private and public companies, legal practices and research organisations.

What we do

Our team includes pioneers within the geotechnical community giving many prestigious named lectures including 9 Rankine, 1 Glossop, 5 Geotechnique, 2 Harding and 1 Terzaghi lectures.

Eight members of the GCG team are Fellows of the Royal Academy of Engineering. Members of GCG have published hundreds of technical papers and major state-of-the-art reviews.

GCG are members of the British Tunnelling Society (BTS), British Geotechnical Association (BGA), Association of Geotechnical & Geoenvironmental Specialists (AGS) and core members of the Construction Industry Research and Information Association (CIRIA). Our Staff and Associates regularly participate in workshops and are actively involved in developing industry best practice guidance for geotechnical issues.

University partnerships

GCG maintains strong links with world-class universities (notably with Imperial College, Cambridge, City, Oxford, Dundee, Barcelona, Kobe, Cornell and Berkeley Universities) to enable early implementation of state-of-the-art research and development into engineering practice.


GCG holds BS EN ISO 9001:2015, BS EN ISO 14001:2015 and ISO 45001:2018 certifications. GCG is registered on the RISQS, Achillies, SSIP (Safety Schemes In Procurement), Cyber Essentials Plus, and Constructionline Accredited Registered Schemes.