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• Marubeni Europe Plc
• Mason Evans
• Matchtech Group plc
• Materials Movement Ltd
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• Mattinson Partnership
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• The University of Oxford
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• Pennwell Corporation
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• Petroleum Exploration Society of Great Britain
• Petroleum Geo-Services
• Petrostrat
• pH Consulting
• Phase Site Investigations Ltd
• Phlorum Limited
• Photography Ireland
• Piledesigns Limited
• Piling Equipment Direct
• Pilling Geoconsultants Limited
• PJ Drilling Contracts
• Platipus Anchors Limited
• Plaxis bv
• Plowman Craven Ltd
• University of Plymouth
• Pore Scale Solutions Limited
• University of Portsmouth
• Powys Drilling Services Ltd
• Premier Corex
• Premier Energy Services Ltd
• Premier Oil Plc
• Premier Plant Eng Ltd
• Priority Drilling Ltd
• Priority Geotechnical Ltd (PGL)
• Prodar Surveys
• Pro-Dig Europe Ltd
• PROKON Software Consultants
• Proquip Direct Limited
• Provectus Remediation Ltd
• PRP UK Limited
• PSA Design Ltd
• PSD (Pigott Shaft Drilling) Ltd
• PSL Professional Soils Laboratory
• QED Environmental Systems Ltd
• QME Limited
• QMJ Publishing Ltd
• QROS Limited
• Quantum Geotechnical Ltd
• R I Geotechnics Ltd
• Raeburn Drilling & Geotechnical Ltd
• Ramboll
• Ravey Consulting
• RAW Group
• Rawcliffe Associates Ltd
• University of Reading
• Rebecca Exley Groundwater Ltd
• REC Ltd
• Red Rock Geoscience Ltd
• RedRock Associates Limited
• Redstart Northwest Limited
• REGENESIS Europe
• Regolith SI
• Reid Geophysics
• Reinforced Earth Company Ltd
• Remada Ltd
• Remediation Strategies Ltd
• Remote Aerial Surveys
• Rendel Ltd
• Resource UK
• Reynolds International Ltd
• RGI Ltd
• RGS - Rogers Geotechnical Services
• Rhondda Geotechnical Services
• Richard Booth's Bookshops
• Richard Tayler Minerals
• Rick Brassington
• Ridge and Partners LLP
• Rieker Inc.
• Riley Geoscience
• Risk Management Limited
• Riverwalk Recruitment
• RJN Engineering Selection
• RM Frobisher (1986) Ltd
• RMA Environmental Limited
• Roberts Environmental Ltd
• Robertson, CGG Services (UK) Limited
• Robertson Geo
• ROC Consulting
• Rock Options Ltd
• Rockbit UK Ltd
• Rockfield Software Ltd
• Rockflow Resources Ltd
• Rockmate Limited
• Rocktype Ltd
• RockWare, Inc.
• Rocscience Inc
• Roctest Ltd
• Roger Bullivant Limited (RB)
• Rolton Group Limited P3 - Civil Engineers
• Roskill Information Services
• Rotary Test Drilling Ltd
• The Royal Academy of Engineering
• Royal Astronomical Society
• Royal Forestry Society
• Royal Geographical Society with IBG
• Royal HaskoningDHV
• Royal Highland and Agricultural Society of Scotland
• Royal Institute of British Architects
• Royal Institution of Chartered Surveyors
• Royal Meteorological Society
• Royal Scottish Geographical Society
• The Royal Society
• Royal Society of Edinburgh
• Royal Society of Biology
• RPS Energy
• RS Hydro Ltd
• RSC Mining and Mineral Exploration
• RSCE Consulting Engineers
• RSK Environment Ltd
• Ruddlesden Geotechnical
• Rukhydro Limited
• Russell Geotechnical Innovations Limited
• The Russell Society
• S M Foster Associates Limited
• SafeLane Global
• Salar Geoscience Ltd
• Salop Sand & Gravel Supply Co Ltd
• Sandberg LLP
• Saxton Drilling Limited
• Scantech Geoscience
• SCGIS Ltd
• Scott Bennett Associates
• Scott Polar Research Institute
• Scottish Wildlife Trust
• Scout Recruitment
• SDImaging
• SDP Consulting Engineers
• Sealand Aerial Photography
• Seatronics Ltd
• Seed Drilling Services
• Seequent UK Ltd
• Senceive Ltd
• Sensys GmbH
• Sequoia Environmental Ltd
• Sercel
• SERPRO
• Servelec Technologies
• Sevenoaks Environmental Consultancy
• SG Access Solutions Ltd
• Shadbolt Group
• ShadowAir Ltd
• University of Sheffield
• Shell UK Exploration & Production
• Shotcrete Services
• Showers and Eyebaths Services Ltd
• SIBIR Energy Ltd
• Sidcup Lapidary & Mineral Society
• Sigicom UK
• Silkstone Environmental Limited
• Simpson Associates Consulting Engineers LLP
• Singleton Birch Ltd
• Site Analytical Group
• Site Vision Surveys
• SJ Geomatics Ltd
• SkyTec UAS Ireland Ltd
• SLR Consulting Ltd
• Smart Geophysics Canada Inc
• Sir Frederick Snow & Partners Ltd
• Society for Underwater Technology
• SOCOTEC UK Limited
• Sodor Geosciences
• Soil Consultants Ltd
• Soil Engineering Geoservices Ltd
• Soil Instruments Limited
• Soil Property Testing Ltd
• Soilmec Ltd
• Soils Limited
• Soiltec Laboratories Ltd
• Soldata Limited
• Solmek Ltd
• Somerset Archaeological and Natural History Society
• Sorby Natural History Society, Geological Group
• University of South Wales
• Southeastern Drilling Services
• Southern Testing Ltd
• Specialised Geological Mapping Ltd
• Specialist Ground Engineering Ltd (SGE)
• Spectrum GEO
• Spray Engineering Ltd
• Springer-Verlag London Ltd
• SRK Consulting
• University of St Andrews
• Staffordshire Wildlife Trust
• Stag Geological Services Ltd
• Stancliffe Stones
• Stanfords
• Stansted Environmental Services Ltd
• Stantec
• Statoil (U.K.) Limited
• Steve Cannon Geoscience Ltd
• STM Environmental Consultants Ltd
• StrataData Ltd
• Stratasolve Ltd
• Stratigraphic Services Limited
• Stratum Reservoir
• Stratum Resources
• Structural Soils Ltd
• Stuart Well Services
• Sub Surface Ltd
• Subscan UDS Ltd
• Subsea 7
• Subtechnics Limited
• Sumo Geophysics Ltd
• The Survey Association
• Survey Three Chartered Land Surveyors Ltd
• Sutcliffe
• Svenska Petroleum Exploration UK Ltd
• Sweco
• Swiftdale Geological Consultants
• Synergy Boreholes and Systems Ltd
• Syntillica Ltd
• T & J Grp Consultants Ltd
• TAL Construction
• Tam International North Sea Ltd
• Tarmac, a CRH Company
• Tate Exploration Consultants Ltd
• Tatra Rotalac Ltd
• Taylor & Francis Group Ltd
• Taylor Drilling Services Ltd
• TD Construction Testing Ltd
• Team UAV
• Technics Group
• Teckna Group Ltd
• TECOP, S.A.
• Tectosat Ltd
• Telluric Land Remediation Ltd
• TenCate Geosynthetics (UK) Ltd
• Tensar International Limited
• Terra Firma (Wales) Limited
• Terra Visio Geosolutions (UK) Limited
• TerraConsult Ltd
• Terradat (UK) Ltd
• Terram (Berry Plastics Company)
• Terramech Investigations Ltd
• Tertiary Research Group
• TestWells
• Texo DSI Limited
• TGS
• thinkWhere
• Thomas Armstrong Holdings Ltd
• Thomas Telford Ltd
• Thompsons of Prudhoe Ltd
• Thomson Ecology
• Tigergeo Limited
• Titan Environmental Surveys
• Tobin Consulting Engineers
• Tolsa UK Ltd
• Tom Briody & Son
• Tony Ford Geo Con PL
• Tony Gee and Partners LLP
• Topcon Great Britain Ltd
• Topdrill Ltd
• Tor Drilling Limited
• Town and Country Planning Association
• T&P Regeneration Ltd
• TPS Consult
• TRaC
• Train & Kemp LLP
• Trendrevel Services Ltd
• Tribal Group Plc
• Trident Hydraulics Ltd
• TRL Limited
• Troika International
• TSR Valstone Ltd
• T.T. Precision Engineering
• TT Surveys Ltd (TTS)
• Tullow Oil plc
• Turnkey Instruments Ltd
• Turnkey Regeneration
• Tweedie Evans Consulting Limited
• Twickenham Surveys
• Tyneside Site Investigations Ltd
• UAV Services (UK) Ltd
• Ubique Ground Engineering Limited
• UKGE Limited
• Ultra-Violet Products Ltd
• Unda Consulting Limited
• University College Cork
• University of Southampton, Ocean & Earth Science
• Urban Regen Limited
• US Radar Inc
• Van Elle Ltd
• Van Walt
• Vandenbelt Consulting
• Veolia Environmental Services (UK) plc
• Verde Environmental Group
• VertaseFLI Limited
• Vertex Access Group
• Vertical Access Ltd
• Visual Technology Services Ltd
• VJ Tech Ltd
• VolkerGround Engineering Ltd
• Wall's Well Drilling
• Ward Cole Consulting Engineers
• Wardell Armstrong LLP
• Wardrop Minerals Management Ltd
• Water Resource Associates LLP
• Waterseekers Well Drilling Services (UK) Ltd
• WB & AD Morgan Limited
• Well Drillers Association
• Well Drilling UK Ltd
• Welsh Stone Forum
• University of The West of Scotland
• West Sussex Geological Society
• WesternGeco
• Westpointe Ltd
• Westwood Global Energy Group
• Wheal Jane Laboratory
• Whiteford Geoservices
• Whittles Publishing Limited
• Wilde Analysis Ltd
• Wiley
• Wilson Associates
• Wiltshire Geology Group
• Wincilate Ltd
• Wiser Environment
• WJ Groundwater Ltd
• WML Consulting
• Wood
• Working Smart Ltd
• Worms Eye Limited
• Wrekin Products Ltd
• Writtle College
• WSP/Parsons Brickerhoff
• WYG
• X-ray Mineral Services Ltd
• YES - Your Environmental Solutions
• Yorkshire Geological Society
• Your Environment Ltd
• YourGeotechnical
• Zenith Global Ltd
• Zetica