Company lists · Data refreshed September 2026

Top 25 Geothermal reservoir engineering firms based in the United Kingdom

RevenueBase identified 140 company matches for geothermal reservoir engineering firms associated with the United Kingdom as of September 2026 and tracks 731 professional contacts across them, including 283 with verified work emails. London is the largest hub.

This list covers company matches for geothermal reservoir engineering firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 16, 2026 How this list was built
140Companies
731Contacts tracked
283Verified emails
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The 25 largest geothermal reservoir engineering firms based in the United Kingdom

Ranked by team size
Top 25 of 140 company matches for geothermal reservoir engineering firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSudbrooke, United KingdomHQ recorded Sep 16, 202651-20083 contacts →

Exact match

“Star Energy Group plc is a British energy business.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2Exact matchEynsham, United KingdomHQ recorded Sep 16, 202651-20075 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3Exact matchNorthallerton, United KingdomHQ recorded Sep 16, 202651-20068 contacts →

Exact match

“Omnia Projects are an Engineering Consultancy providing multidisciplinary expertise for energy projects providing a complete service from feasibility and concept development…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4Exact matchGreat Yarmouth, United KingdomHQ recorded Sep 16, 202611-5028 contacts →

Exact match

“CeraPhi Energy is a leading project development company delivering global geothermal energy solutions at scale.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5Exact matchWimborne Minster, United KingdomHQ recorded Sep 16, 20261-1025 contacts →

Exact match

“Hydenlyne is a privately owned consultancy, based in Dorset, UK, providing technical consultants globally across the offshore and onshore sectors.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6Exact matchSeaham, United KingdomHQ recorded Sep 16, 202611-5021 contacts →

Exact match

“Drilcorp was established in 1992 and since then has developed into one of the UK’s top drilling companies.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7Exact matchReigate, United KingdomHQ recorded Sep 16, 202611-5016 contacts →

Exact match

“Stillwater Associates is dedicated to reservoir safety and water engineering services.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8Exact matchFalmouth, United KingdomHQ recorded Sep 16, 202611-5014 contacts →

Exact match

“GeoScience Limited is an independent earth science consultancy, providing engineering, geomechanics and reservoir geology solutions to the oil, gas and geothermal industries.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9Exact matchRedruth, United KingdomHQ recorded Sep 16, 20261-1014 contacts →

Exact match

“GEL has brought the most experienced geothermal engineers together with leading industry partners to develop the UK's first large-scale geothermal energy plant in Cornwall.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10Exact matchEdinburgh City, United KingdomHQ recorded Sep 16, 202611-5014 contacts →

Exact match

“We are an award-winning geothermal company based in Edinburgh, Scotland and a leading specialist in all aspects of the UK’s geothermal resources.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11Exact matchAylesbury, United KingdomHQ recorded Sep 16, 202611-5014 contacts →

Exact match

“We specialise in Geothermal Ground Source Boreholes and Water Boreholes up to 300m.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12Exact matchStroud, United KingdomHQ recorded Sep 16, 202611-509 contacts →

Exact match

“UK leader in hydropower consultancy, environmental licensing, detailed design and specification, project management and installation.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13Exact matchAberdeen, United KingdomHQ recorded Sep 16, 202611-509 contacts →

Exact match

“Seismic Image Processing is a premier provider of bespoke seismic image solutions, with offices in Aberdeen and Guildford.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14Exact matchTaunton, United KingdomHQ recorded Sep 16, 202611-509 contacts →

Exact match

“OpenGoSim (OGS) develops and supports Cirrus (formerly known as PFLOTRAN-OGS), a reservoir simulator dedicated to CO2 Geological Storage.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 16, 20261-109 contacts →

Exact match

“Smart, sustainable heating and cooling, powered by the earth.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16Exact matchLedbury, United KingdomHQ recorded Sep 16, 202611-508 contacts →

Exact match

“Merlin Energy Resources is an employee-owned geoscience, engineering and data consultancy formed in 1998.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17Exact matchKempston, United KingdomHQ recorded Sep 16, 202611-508 contacts →

Exact match

“ANTS Group are a leading supplier of Renewables, Civils, Drilling and Environmental services.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18Exact matchNorwich, United KingdomHQ recorded Sep 16, 202611-506 contacts →

Exact match

“Independent geoconsulting for onshore and offshore projects.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19Exact matchDonkleywood, United KingdomHQ recorded Sep 16, 20261-105 contacts →

Exact match

“Black Reiver Consulting, an independent training provider and management consultancy for the drilling industry, prides itself on its close collaboration with energy-related…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 16, 20261-105 contacts →

Exact match

“dCarbonX is a pioneering asset-focused GeoEnergy company established to develop subsurface assets for energy storage and for the sequestration of CO2.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21Exact matchCardiff, United KingdomHQ recorded Sep 16, 20261-105 contacts →

Exact match

“MSA Mining Consulting UK Ltd is part of the larger MSA Group, an independent technical consultancy providing high quality geology, exploration, mineral resource, mining and…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22Exact matchLey Hill, United KingdomHQ recorded Sep 16, 202611-505 contacts →

Exact match

“Ground Investigation, Geotechnical Design Advice, Geothermal Energy, Water Abstraction, Expert Opinion, Knowledge and Training – TFGI provide the essential Ground Engineering…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23Exact matchCambridge, United KingdomHQ recorded Sep 16, 20261-104 contacts →

Exact match

“Primeval Energy is a geothermal solutions company, newly established by seasoned oil and gas, geothermal, finance and commercial professionals.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24Exact matchShepton Mallet, United KingdomHQ recorded Sep 16, 20261-104 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25Exact matchSheffield, United KingdomHQ recorded Sep 16, 202651-2004 contacts →

Exact match

“Consortium Drilling is a leading onshore deep drilling contractor based in the heart of the UK.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase

Showing 25 of 140 geothermal reservoir engineering firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 283 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal reservoir engineering firms based in the United Kingdom at a glance

As of Sep 16, 2026
38.7%Verified-email coverage
5.2Average contacts per company
1-10Median size (employees)
16.4%Largest-city concentration · London
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
100
11-50
33
51-200
5

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 140 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “geothermal reservoir engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 283 professional contacts with verified work emails across the full matched dataset. 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 16, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “geothermal reservoir engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal reservoir engineering firms are there based in the United Kingdom?

RevenueBase identified 140 company matches for geothermal reservoir engineering firms associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Star Energy Group PLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal reservoir engineering firms?

London leads with 23 company records, followed by Aberdeen (14) and Edinburgh (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 283 professional contacts with verified work emails tracked across these 140 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 140 geothermal reservoir engineering firms based in the United Kingdom. Start with a free account, no credit card.

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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 SmartSearch, 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.