Company lists · Data refreshed September 2026

Top 25 Refinery engineering firms based in the United Kingdom

Name: Refinery engineering 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 17, 2026 1,113 companies tracked

RevenueBase identified 1,113 company matches for refinery engineering firms associated with the United Kingdom as of September 2026 and tracks 60,165 professional contacts across them, including 14,083 with verified work emails. London is the largest hub.

This list covers company matches for refinery 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 17, 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 17, 2026 How this list was built

1,113Companies

60,165Contacts tracked

14,083Verified emails

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The 25 largest refinery engineering firms based in the United Kingdom

Ranked by team size

Top 25 of 1,113 company matches for refinery engineering firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	WOOD	Exact match	Aberdeen, United KingdomHQ recorded Sep 17, 2026	10001+	26,949 contacts →
	Exact match “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Penspen	Exact match	London, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	1,007 contacts →
	Exact match “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Pd&ms Group	Exact match	Aberdeen, United KingdomHQ recorded Sep 17, 2026	501-1,000	653 contacts →
	Exact match “PD & MS Group has full multi-discipline in-house EPCC capability and is recognised as a provider of safe, effective, and cost efficient design and engineering services to onshore…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	KBR Granherne	Exact match	Leatherhead, United KingdomHQ recorded Sep 17, 2026	501-1,000	648 contacts →
	Exact match “KBR Consulting is one of the world's foremost engineering consultancies specializing in the hydrocarbon and energy industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Bgen LTD	Exact match	Warrington, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	646 contacts →
	Exact match “We are BGEN.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Ineos Grangemouth	Exact match	Grangemouth, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	466 contacts →
	Exact match “Located at Grangemouth, some 40km west of Edinburgh, one of INEOS’ largest manufacturing sites directly employs c1500 highly skilled people.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Fairhurst	Exact match	Glasgow, United KingdomHQ recorded Sep 17, 2026	201-500	437 contacts →
	Exact match “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	MES	Exact match	Leatherhead, United KingdomHQ recorded Sep 17, 2026	201-500	403 contacts →
	Exact match “Monaco Engineering Solutions (MES) is a specialised technical consultancy with a focus in the Oil & Gas, Petrochemical and Refining, Renewable & Clean Energy, Chemical…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Trant Engineering LTD	Exact match	Southampton, United KingdomHQ recorded Sep 17, 2026	501-1,000	376 contacts →
	Exact match “Trant Engineering Ltd is one of the leading, privately owned engineering companies in the UK.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Claxton Engineering Services	Exact match	Great Yarmouth, United KingdomHQ recorded Sep 17, 2026	201-500	279 contacts →
	Exact match “Claxton, an AF Gruppen Company, combines decades of industry experience, proprietary technology, and exceptional service quality to cut through offshore installation and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Ledwood Mechanical Engineering LTD	Exact match	Pembrokeshire, United KingdomHQ recorded Sep 17, 2026	501-1,000	266 contacts →
	Exact match “Ledwood is an independent engineering, fabrication and construction company specialising in the delivery of complex projects across the oil, gas, process and energy industries.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	The Erith Group	Exact match	London, United KingdomHQ recorded Sep 17, 2026	501-1,000	217 contacts →
	Exact match “Supported by a network of specialist consulting engineers, environmentalists and our own collective experience, our philosophy is simple: to provide a qualitative economic and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Actemium UK	Exact match	Birmingham, United KingdomHQ recorded Sep 17, 2026	501-1,000	190 contacts →
	Exact match “At Actemium UK, we are expert electrical, automation and mechanical engineers delivering bespoke engineering solutions across industry, infrastructure and beyond.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Wilton Engineering	Exact match	Middlesbrough, United KingdomHQ recorded Sep 17, 2026	201-500	188 contacts →
	Exact match “Wilton Engineering is a multi-disciplined Engineering Services provider based on a 113 acre site by the River Tees in Middlesbrough, North-East England.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Blackrow Group	Exact match	Grimsby, United KingdomHQ recorded Sep 17, 2026	201-500	182 contacts →
	Exact match “For over 45 years, Blackrow Engineering has been delivering high-quality engineering, fabrication, and site services to clients across the UK and worldwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Briggs Of Burton	Exact match	Burton-On-Trent, United KingdomHQ recorded Sep 17, 2026	201-500	175 contacts →
	Exact match “Briggs are experienced Process Engineers, operating in the Brewing and Distilling sector since 1732 and responsible for some of the most high profile work of the last decade.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Eastgate Engineering	Exact match	Thornaby-on-tees, United KingdomHQ recorded Sep 17, 2026	201-500	163 contacts →
	Exact match “Eastgate Engineering is an Electrical and Instrumentation contractor that delivers complex, high-risk infrastructure projects with cost certainty, without compromising safety or…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Z-Tech Control Systems LTD	Exact match	Swavesey, United KingdomHQ recorded Sep 17, 2026	201-500	156 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Unitbirwelco	Exact match	Elba Crescent, United KingdomHQ recorded Sep 17, 2026	201-500	117 contacts →
	Exact match “As a leading expert in thermal equipment, UnitBirwelco is dedicated to delivering excellence in design, project management, manufacturing, fabrication, construction, and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	CTS Offshore & Marine	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	106 contacts →
	Exact match “CTS Offshore & Marine Ltd is an independent provider of engineering services tailored for energy and material markets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	MII Engineering	Exact match	Bedwas, United KingdomHQ recorded Sep 17, 2026	201-500	104 contacts →
	Exact match “Being a dynamic, customer focused Engineering company enables us to tailor each of our services to particular clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Petrex Energy Services Limited	Exact match	Aberdeen, United KingdomHQ recorded Sep 17, 2026	11-50	99 contacts →
	Exact match “Innovative Engineering Excellence for the energy sector through our engineering design & field development divisions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Intelect	Exact match	Middlesbrough, United KingdomHQ recorded Sep 17, 2026	201-500	92 contacts →
	Exact match “At Intelect we have extensive experience providing engineering expertise to process industries involved in food & beverages manufacturing, utilities, heavy industry and renewable…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Katoni Engineering	Exact match	Aberdeen, United KingdomHQ recorded Sep 17, 2026	51-200	90 contacts →
	Exact match “Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Barrier Group	Exact match	Wallsend, United KingdomHQ recorded Sep 17, 2026	201-500	89 contacts →
	Exact match “Founded in 1975 in the North East of England, Barrier Group is a multi-disciplined turnkey engineering, design, and build contractor with over 50 years’ experience across…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “refinery engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 1,113 refinery engineering firms based in the United Kingdom

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Refinery engineering firms based in the United Kingdom at a glance

As of Sep 17, 2026

23.4%Verified-email coverage

54.1Average contacts per company

1-10Median size (employees)

11.9%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

662

11-50

293

51-200

106

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 1,113 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 “refinery 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 14,083 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 17, 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 “refinery engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,113 company matches for refinery 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?

WOOD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most refinery engineering firms?

London leads with 132 company records, followed by Aberdeen (67) and Manchester (22).

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 14,083 professional contacts with verified work emails tracked across these 1,113 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 17, 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 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.