Company lists · Data refreshed September 2026

Top 25 Gas consulting firms based in the United Kingdom

Name: Gas consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 235 companies tracked

RevenueBase identified 235 gas consulting firms headquartered in the United Kingdom as of September 2026 and tracks 31,873 professional contacts across them, including 8,649 with verified work emails. London is the largest hub.

This list covers gas 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 21, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

235Companies

31,873Contacts tracked

8,649Verified emails

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The 25 largest gas consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 235 gas consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to gas consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	WOOD	Partial evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	10001+	26,949 contacts →
	Partial evidence “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Source: RevenueBase Database · checked Sep 21, 2026
2	KBR Granherne	Partial evidence	Leatherhead, United KingdomHQ checked Sep 21, 2026	501-1,000	648 contacts →
	Partial evidence “KBR Consulting is one of the world's foremost engineering consultancies specializing in the hydrocarbon and energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
3	Genesis	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	401 contacts →
	Indirect evidence “Genesis is a market-leading advisory company focused on providing high-value technical and advisory services for the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
4	AXIS	Indirect evidence	Aberdeenshire, United KingdomHQ checked Sep 21, 2026	51-200	94 contacts →
	Indirect evidence “Based in Aberdeen, Axis is an independent consultancy providing specialist Exploration and Production, Decommissioning and Low Carbon expertise to the global energy industry and…” Source: RevenueBase Database · checked Sep 21, 2026
5	Katoni Engineering	Partial evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	51-200	90 contacts →
	Partial evidence “Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Source: RevenueBase Database · checked Sep 21, 2026
6	Euro Petroleum Consultants	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	66 contacts →
	Strong evidence “We are a leading independent consulting company with global expertise in Refining, Gas, Petrochemicals, Renewables, and Alternative Energies.” Source: RevenueBase Database · checked Sep 21, 2026
7	JBA Engineering	Indirect evidence	Wynyard, United KingdomHQ checked Sep 21, 2026	11-50	63 contacts →
	Indirect evidence “JBA are industry-leading consultants, providing flexible engineering and design solutions, procurement, and construction services.” Source: RevenueBase Database · checked Sep 21, 2026
8	Nexanteca, Energy And Chemicals Advisory	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	58 contacts →
	Indirect evidence “NexantECA, the Energy and Chemicals Advisory company is the leading advisor to the energy, refining, and chemical industries.” Source: RevenueBase Database · checked Sep 21, 2026
9	OPC	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	58 contacts →
	Partial evidence “OPC is a leading global energy consultancy specialising in providing clients with top-tier expertise and innovative solutions across the upstream E&P, Gas and CO2 storage domains…” Source: RevenueBase Database · checked Sep 21, 2026
10	Kelton	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	11-50	52 contacts →
	Indirect evidence “Kelton is the energy industry’s consultancy partner.” Source: RevenueBase Database · checked Sep 21, 2026
11	GAS Strategies	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	45 contacts →
	Partial evidence “In a world where speed is a competitive advantage, Gas Strategies accelerates your route to readiness.” Source: RevenueBase Database · checked Sep 21, 2026
12	GGS	Partial evidence	Stockport, United KingdomHQ checked Sep 21, 2026	11-50	45 contacts →
	Partial evidence “Welcome to GGS, Experts in Continuous Monitoring GGS is the UK’s leading provider of continuous gas monitoring data, analysis and interpretation services With a reputation built…” Source: RevenueBase Database · checked Sep 21, 2026
13	Long O Donnell	Indirect evidence	Northwich, United KingdomHQ checked Sep 21, 2026	51-200	38 contacts →
	Indirect evidence “Long O Donnell are the consultant within the Energy and Infrastructure sectors providing design and engineering, project delivery, commercial and contract services alongside…” Source: RevenueBase Database · checked Sep 21, 2026
14	Consub	Indirect evidence	Surbiton, United KingdomHQ checked Sep 21, 2026	11-50	32 contacts →
	Indirect evidence “CONSUB is an independent engineering and project management services provider to the global energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
15	Gaffneycline	Strong evidence	Farnham, United KingdomHQ checked Sep 21, 2026	51-200	29 contacts →
	Strong evidence “GaffneyCline provides integrated technical and commercial consulting and independent advice on oil, gas and carbon management.” Source: RevenueBase Database · checked Sep 21, 2026
16	Tems International	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	1-10	24 contacts →
	Indirect evidence “Turnkey Environmental Management Services Limited (TEMS) was incorporated in Scotland UK and from its Aberdeen base, provides environmental management services globally to the oil…” Source: RevenueBase Database · checked Sep 21, 2026
17	Petrovision	Indirect evidence	Fulham, United KingdomHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “PetroVision's workforce is comprised of highly qualified professionals, the principal staff have on average 20 years of industry experience in the areas of Geoscience, Engineering…” Source: RevenueBase Database · checked Sep 21, 2026
18	Elixir Consultant UK	Partial evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	51-200	19 contacts →
	Partial evidence “ELIXIR Consultants provide market leading state-of-the art consultancy support to the oil and gas and Petrochemical industries across all lifecycle stages – from appraise through…” Source: RevenueBase Database · checked Sep 21, 2026
19	Calash	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Calash is an award-winning strategic advisory firm focused on the energy and industrials sectors.” Source: RevenueBase Database · checked Sep 21, 2026
20	Oilfield Production Enhancement Consulting Services Opecs LTD	Partial evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	1-10	17 contacts →
	Partial evidence “Oilfield Production Enhancement Consulting Services (OPECS) LTD is an experienced and dynamic company based in Aberdeen UK which aims to provide best in class technical…” Source: RevenueBase Database · checked Sep 21, 2026
21	Professional Energy Services LTD	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “We are a leading energy consultant known for continued excellence, quality, professionalism, exibility, and pioneering approach which is reflected in the many industry awards that…” Source: RevenueBase Database · checked Sep 21, 2026
22	Adroit Utilities LTD	Partial evidence	Telford, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “Adroit Utilities is one of the UK's leading Utility Infrastructure Providers (UIP) and is accredited by the Gas Industry Registration Scheme (GIRS) for the achievement of quality…” Source: RevenueBase Database · checked Sep 21, 2026
23	Tutis Energy	Indirect evidence	Cardiff, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “We are independant advisors to the energy industry that deliver client specific assignements globally.” Source: RevenueBase Database · checked Sep 21, 2026
24	Tecmor International LLC	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	1-10	14 contacts →
	Indirect evidence “Houston-based international energy consultancy” Source: RevenueBase Database · checked Sep 21, 2026
25	Energy Market And Regulatory Consultants Emrc	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 21, 2026	51-200	13 contacts →
	Indirect evidence “Energy Market and Regulatory Consultants (EMRC) are consultants and advisers in energy markets, regulation, transactions and commercial issues.” Source: RevenueBase Database · checked Sep 21, 2026

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: gas 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 gas consulting firms.
Partial evidence: Its own public description names part of gas consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name gas 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 235 gas consulting firms based in the United Kingdom

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Gas consulting firms based in the United Kingdom at a glance

As of Sep 21, 2026

27.1%Verified-email coverage

135.6Average contacts per company

1-10Median size (employees)

33.2%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

148

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 235 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 gas 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 “gas 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 gas 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 gas 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, 8,649 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 21, 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.

Gas consulting firms by metro

Gas consulting firms in London78
Gas consulting firms in Aberdeen27

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 gas 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 gas consulting firms are there based in the United Kingdom?

RevenueBase identified 235 gas 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?

WOOD, headquartered in Aberdeen, tops this list with the largest team on record.

Which city has the most gas consulting firms?

London leads with 78 headquartered companies, followed by Aberdeen (27) and Edinburgh (4).

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 8,649 verified decision-maker contacts tracked across these 235 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 21, 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.