Company lists · Data refreshed September 2026
Top 25 Subsurface technical consulting firms based in the United Kingdom
RevenueBase identified 413 subsurface technical consulting firms headquartered in the United Kingdom as of September 2026 and tracks 9,235 professional contacts across them, including 2,455 with verified work emails. London is the largest hub.
This list covers subsurface technical consulting firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest subsurface technical consulting firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,960 contacts → | ||||
Indirect evidence “Every day, people around the world live, work and play on ground prepared by Keller, the world's largest geotechnical specialist contractor.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 159 contacts → | ||||
Indirect evidence “Igne is a leading UK specialist delivering integrated and stand-alone services across ground investigation, specialist drilling, UXO risk mitigation, materials testing…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 108 contacts → | ||||
Indirect evidence “Soil Engineering has been involved with the geotechnical sector since 1963.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 95 contacts → | ||||
Indirect evidence “Founded in 1983, Geotechnics Limited is now one of the largest independent geotechnical specialists in the UK.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 94 contacts → | ||||
Indirect evidence “Auger are the leading underground services and subsidence specialist working exclusively for the insurance industry across the UK.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 86 contacts → | ||||
Partial evidence “CGL is a leading specialist geotechnical consultancy and has a reputation for solving difficult technical problems with value engineering in construction projects.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 85 contacts → | ||||
Indirect evidence “Engineering Value Together - from incubation, to project realisation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 75 contacts → | ||||
Indirect evidence “Zetica is the UK’s leader in engineering and environmental geophysics, with an enviable reputation for objective advice, novel problem solving, consistently high-quality surveys…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 63 contacts → | ||||
Indirect evidence “Dr.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 62 contacts → | ||||
Partial evidence “E3P was founded because we believed there was a better way to deliver value by creating a different kind of Geotechnical and Environmental Consultancy which focused on technical…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 60 contacts → | ||||
Indirect evidence “Causeway Geotech Ltd bring together a team of Chartered Geotechnical Engineers with over 100 years of experience in total of offshore and onshore geotechnical ground investigation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 60 contacts → | ||||
Indirect evidence “CC Ground Investigations specialise in undertaking all types of geotechnical and environmental site investigation work throughout the U.K.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 54 contacts → | ||||
Partial evidence “Ian Farmer Associates has been carrying out ground investigations since 1985 and has built a strong client base of consulting engineers, builders, developers, architects…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 50 contacts → | ||||
Indirect evidence “Crondall Energy is an independent offshore energy consultancy specialising in floating and subsea facilities.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 45 contacts → | ||||
Indirect evidence “Looking for a ground investigation or remediation partner you can trust?” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 41 contacts → | ||||
Indirect evidence “Strata Geotechnics is one of the UK's leading ground investigation and geotechnical specialist contractors.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 39 contacts → | ||||
Indirect evidence “Peritus International provides world-leading subsea pipeline, umbilical, riser and cable engineering.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 38 contacts → | ||||
Indirect evidence “LBA is an engineering consultancy specialising in tunnelling, underground works and heavy civil engineering construction.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 38 contacts → | ||||
Indirect evidence “About Us Since 1992, we have been delivering trusted geotechnical, environmental and fabric survey consultancy services, helping our clients to navigate risks and successfully…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 37 contacts → | ||||
Indirect evidence “Tadek Ocean Engineering provides dynamic consultancy and project delivery resources for marine, offshore and subsea projects.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 35 contacts → | ||||
Indirect evidence “Brownfield Solutions Limited, part of Celnor Group, are specialist Geo-Environmental and Geotechnical Consultants Our vision is to be a widely renowned and highly respected…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 32 contacts → | ||||
Indirect evidence “Harrison Group Environmental is one of the UK’s leading geotechnical and geoenvironmental engineering firms.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 29 contacts → | ||||
Partial evidence “Geotechnical Consulting Group (GCG) is one of the world’s leading independent geotechnical engineering consultancies, recognised for delivering innovative, research driven…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 28 contacts → | ||||
Indirect evidence “Johnson Poole and Bloomer is an independent multidisciplinary geoenvironmental and mineral consultancy operating in several closely related and complementary areas - Geotechnical…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 25 contacts → | ||||
Indirect evidence “Geo-Environmental is an independent practice of geotechnical engineers, environmental consultants, and investigation contractors, who have been established since 1996.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: subsurface technical consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names subsurface technical consulting firms.
- Partial evidence
- Its own public description names part of subsurface technical consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name subsurface technical consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 413 subsurface technical consulting firms based in the United Kingdom
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Subsurface technical consulting firms based in the United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 413 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among subsurface technical consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “subsurface technical consulting firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names subsurface technical consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among subsurface technical consulting firms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,455 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Subsurface technical consulting firms by metro
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names subsurface technical consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many subsurface technical consulting firms are there based in the United Kingdom?
RevenueBase identified 413 subsurface technical consulting firms headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Keller, headquartered in London, tops this list with the largest team on record.
Which city has the most subsurface technical consulting firms?
London leads with 45 headquartered companies, followed by Aberdeen (18) and Manchester (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,455 verified decision-maker contacts tracked across these 413 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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