Company lists · Data refreshed September 2026

Top 25 Offshore electrical engineering firms based in the United Kingdom

Name: Offshore electrical 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 1,772 companies tracked

RevenueBase identified 1,772 offshore electrical engineering firms headquartered in the United Kingdom as of September 2026 and tracks 32,356 professional contacts across them, including 10,599 with verified work emails. London is the largest hub.

This list covers offshore electrical engineering 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 17, 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 17, 2026 86% judged on-target in blind review

1,772Companies

32,356Contacts tracked

10,599Verified emails

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The 25 largest offshore electrical engineering firms based in the United Kingdom

Ranked by team size

Top 25 of 1,772 offshore electrical engineering firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore electrical engineering 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	Bilfinger UK	Partial evidence	Warrington, United KingdomHQ checked Sep 17, 2026	1,001-5,000	2,052 contacts →
	Partial evidence “With a strong commitment to sustainability, Bilfinger UK stands out as a premier provider of engineering and maintenance services.” Source: RevenueBase Database · checked Sep 17, 2026
2	Altera Infrastructure	Partial evidence	Aberdeenshire, United KingdomHQ checked Sep 17, 2026	501-1,000	955 contacts →
	Partial evidence “Altera Infrastructure is a leading global energy infrastructure services group focused on the ownership and operation of offshore energy assets.” Source: RevenueBase Database · checked Sep 17, 2026
3	ABL	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	804 contacts →
	Indirect evidence “The Energy and Marine Consultants - an Aqualis company.” Source: RevenueBase Database · checked Sep 17, 2026
4	Freedom	Partial evidence	Leeds, United KingdomHQ checked Sep 17, 2026	1,001-5,000	664 contacts →
	Partial evidence “Freedom is a leading provider of facilities and power engineering services.” Source: RevenueBase Database · checked Sep 17, 2026
5	Pd&ms Group	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	501-1,000	653 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
6	KBR Granherne	Partial evidence	Leatherhead, United KingdomHQ checked Sep 17, 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 17, 2026
7	Aureos	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	583 contacts →
	Partial evidence “Aureos is a multi-disciplinary energy, transport networks specialist and engineering services provider, spanning the design, engineering, installation, maintenance, and crisis…” Source: RevenueBase Database · checked Sep 17, 2026
8	Gardline Limited	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 17, 2026	501-1,000	545 contacts →
	Indirect evidence “Gardline is a best-in-class provider of geophysical, geotechnical and environmental marine surveys.” Source: RevenueBase Database · checked Sep 17, 2026
9	Boskalis Subsea Services	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	201-500	516 contacts →
	Partial evidence “Boskalis Subsea Services is a world-leading provider of specialist subsea solutions for the offshore energy industry, seamlessly integrating services to deliver optimum results.” Source: RevenueBase Database · checked Sep 17, 2026
10	Quartzelec Limited	Strong evidence	Rugby, United KingdomHQ checked Sep 17, 2026	501-1,000	412 contacts →
	Strong evidence “Quartzelec is a leading independent electrical engineering group delivering solutions and services in both UK and global markets.” Source: RevenueBase Database · checked Sep 17, 2026
11	Boston Energy	Partial evidence	Hessle, United KingdomHQ checked Sep 17, 2026	51-200	391 contacts →
	Partial evidence “Boston Energy is a specialist delivery partner to the offshore wind industry, supporting OEMs, Developers, Tier 1 contractors and vessel owners across the full wind farm lifecycle.” Source: RevenueBase Database · checked Sep 17, 2026
12	Brush Group	Indirect evidence	Loughborough, United KingdomHQ checked Sep 17, 2026	501-1,000	367 contacts →
	Indirect evidence “We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…” Source: RevenueBase Database · checked Sep 17, 2026
13	SMD	Indirect evidence	Wallsend, United KingdomHQ checked Sep 17, 2026	51-200	292 contacts →
	Indirect evidence “SMD is an advanced global designer and manufacturer of subsea remotely operated and autonomous power and control solutions.” Source: RevenueBase Database · checked Sep 17, 2026
14	2h Offshore	Strong evidence	Woking, United KingdomHQ checked Sep 17, 2026	201-500	286 contacts →
	Strong evidence “2H Offshore delivers leading-edge advanced systems engineering for all types of offshore structures in the oil and gas and renewable energy sectors.” Source: RevenueBase Database · checked Sep 17, 2026
15	SKN	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	201-500	224 contacts →
	Partial evidence “SKN specialise in providing competent technical personnel to carry out engineering solutions from concept to completion in the design, supply, installation, commissioning…” Source: RevenueBase Database · checked Sep 17, 2026
16	Acteon	Strong evidence	Norwich, United KingdomHQ checked Sep 17, 2026	1,001-5,000	192 contacts →
	Strong evidence “Acteon delivers data-driven, engineering-led solutions across the lifecycle of offshore energy infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
17	Actemium UK	Strong evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	501-1,000	190 contacts →
	Strong evidence “At Actemium UK, we are expert electrical, automation and mechanical engineers delivering bespoke engineering solutions across industry, infrastructure and beyond.” Source: RevenueBase Database · checked Sep 17, 2026
18	Wilton Engineering	Partial evidence	Middlesbrough, United KingdomHQ checked Sep 17, 2026	201-500	188 contacts →
	Partial evidence “Wilton Engineering is a multi-disciplined Engineering Services provider based on a 113 acre site by the River Tees in Middlesbrough, North-East England.” Source: RevenueBase Database · checked Sep 17, 2026
19	OWC	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	185 contacts →
	Indirect evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 17, 2026
20	Wood Thilsted	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	175 contacts →
	Strong evidence “Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Source: RevenueBase Database · checked Sep 17, 2026
21	OSBIT	Indirect evidence	Northumberland, United KingdomHQ checked Sep 17, 2026	201-500	171 contacts →
	Indirect evidence “Osbit’s vision is to unlock a clean energy future by creating smarter technology.” Source: RevenueBase Database · checked Sep 17, 2026
22	Aquaterra Energy	Partial evidence	Norwich, United KingdomHQ checked Sep 17, 2026	51-200	167 contacts →
	Partial evidence “Aquaterra Energy provides intelligently engineered products and services for well access and offshore developments - supporting efficient operations across the full life cycle of…” Source: RevenueBase Database · checked Sep 17, 2026
23	Eastgate Engineering	Strong evidence	Thornaby-on-tees, United KingdomHQ checked Sep 17, 2026	201-500	163 contacts →
	Strong evidence “Eastgate Engineering is an Electrical and Instrumentation contractor that delivers complex, high-risk infrastructure projects with cost certainty, without compromising safety or…” Source: RevenueBase Database · checked Sep 17, 2026
24	Z-Tech Control Systems LTD	Indirect evidence	Swavesey, United KingdomHQ checked Sep 17, 2026	201-500	156 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	Seatrium Offshore Renewable Services LTD	Partial evidence	Lowestoft, United KingdomHQ checked Sep 17, 2026	n/a	155 contacts →
	Partial evidence “Seatrium Offshore Renewable Services Ltd (Seatrium ORS) has over 55 years of unparalleled expertise and experience in the offshore energy industry.” Source: RevenueBase Database · checked Sep 17, 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: offshore electrical engineering 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 offshore electrical engineering firms.
Partial evidence: Its own public description names part of offshore electrical engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore electrical engineering 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 1,772 offshore electrical engineering firms based in the United Kingdom

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Offshore electrical engineering firms based in the United Kingdom at a glance

As of Sep 17, 2026

32.8%Verified-email coverage

18.3Average contacts per company

1-10Median size (employees)

7.7%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

954

11-50

543

51-200

196

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 1,772 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 offshore electrical engineering 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 “offshore electrical engineering 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 offshore electrical engineering 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 offshore electrical engineering 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, 10,599 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 17, 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.

Offshore electrical engineering firms by metro

Offshore electrical engineering firms in London137
Offshore electrical engineering firms in Aberdeen118
Offshore electrical engineering firms in Manchester30
Offshore electrical engineering firms in Glasgow29

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 offshore electrical engineering 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 offshore electrical engineering firms are there based in the United Kingdom?

RevenueBase identified 1,772 offshore electrical engineering 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?

Bilfinger UK, headquartered in Warrington, tops this list with the largest team on record.

Which city has the most offshore electrical engineering firms?

London leads with 137 headquartered companies, followed by Aberdeen (118) and Manchester (30).

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 10,599 verified decision-maker contacts tracked across these 1,772 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 17, 2026.

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Offshore electrical engineering firms by geography

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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.