Company lists · Data refreshed September 2026

Top 25 Nuclear facility engineering firms based in the United Kingdom

Name: Nuclear facility 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 82 companies tracked

RevenueBase identified 82 nuclear facility engineering firms headquartered in the United Kingdom as of September 2026 and tracks 16,669 professional contacts across them, including 5,266 with verified work emails. Bristol is the largest hub.

This list covers nuclear facility 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

82Companies

16,669Contacts tracked

5,266Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest nuclear facility engineering firms based in the United Kingdom

Ranked by team size

Top 25 of 82 nuclear facility 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 nuclear facility 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	Atkins	Indirect evidence	Epsom, United KingdomHQ checked Sep 17, 2026	10001+	9,297 contacts →
	Indirect evidence “Atkins is now AtkinsRéalis.” Source: RevenueBase Database · checked Sep 17, 2026
2	Cavendish Nuclear	Partial evidence	Birchwood, United KingdomHQ checked Sep 17, 2026	5,001-10,000	1,592 contacts →
	Partial evidence “Cavendish Nuclear is a core part of Babcock International Group’s Nuclear Sector.” Source: RevenueBase Database · checked Sep 17, 2026
3	Urenco Global	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	539 contacts →
	Indirect evidence “Urenco is an international supplier of enrichment services and fuel cycle products with sustainability at the core of its business.” Source: RevenueBase Database · checked Sep 17, 2026
4	NSG Environmental LTD	Partial evidence	Chorley, United KingdomHQ checked Sep 17, 2026	501-1,000	297 contacts →
	Partial evidence “We support our clients by delivering safe, practical and efficient solutions to complex nuclear challenges, with a strong focus on disposability.” Source: RevenueBase Database · checked Sep 17, 2026
5	Veolia Nuclear Solutions	Strong evidence	Abingdon, United KingdomHQ checked Sep 17, 2026	501-1,000	284 contacts →
	Strong evidence “Veolia’s Nuclear Expertise: As part of the global Veolia Group, we deliver integrated nuclear solutions that combine cutting-edge technology, engineering excellence, and decades…” Source: RevenueBase Database · checked Sep 17, 2026
6	Framatome UK	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	201-500	181 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
7	DBD International	Partial evidence	Birchwood, United KingdomHQ checked Sep 17, 2026	51-200	169 contacts →
	Partial evidence “DBD is an independent global enterprise providing innovative solutions to complex technical, engineering and strategic challenges in highly regulated industries.” Source: RevenueBase Database · checked Sep 17, 2026
8	Orano Limited	Partial evidence	Abingdon, United KingdomHQ checked Sep 17, 2026	51-200	80 contacts →
	Partial evidence “Orano transforms nuclear materials so that they can be used to support the development of society, first and foremost in the field of energy.” Source: RevenueBase Database · checked Sep 17, 2026
9	Bendalls Engineering	Partial evidence	Carlisle, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial evidence “Bendalls Engineering has a strong reputation in engineering, located in Carlisle, Cumbria.” Source: RevenueBase Database · checked Sep 17, 2026
10	React Engineering Limited	Indirect evidence	Cleator, United KingdomHQ checked Sep 17, 2026	11-50	47 contacts →
	Indirect evidence “React brings strategic clarity and delivery leadership to complex challenges in highly regulated sectors.” Source: RevenueBase Database · checked Sep 17, 2026
11	JGC Engineering And Technical Services LTD	Partial evidence	Thurso, United KingdomHQ checked Sep 17, 2026	51-200	42 contacts →
	Partial evidence “JGC is one of the UK's leading engineering companies with the breadth and depth of technical expertise to respond to the daily complex challenges of major engineering projects.” Source: RevenueBase Database · checked Sep 17, 2026
12	Cyclife Aquila Nuclear	Partial evidence	Twyford, United KingdomHQ checked Sep 17, 2026	51-200	35 contacts →
	Partial evidence “Cyclife Aquila Nuclear has now merged with Cyclife UK Ltd to bring together our complementary expertise and strong industry reputations to form a single, unified UK entity.” Source: RevenueBase Database · checked Sep 17, 2026
13	Core Nuclear Solutions LTD	Strong evidence	Workington, United KingdomHQ checked Sep 17, 2026	11-50	33 contacts →
	Strong evidence “CORE Nuclear Solutions is a specialist nuclear remote engineering SME based at Lillyhall in Workington.” Source: RevenueBase Database · checked Sep 17, 2026
14	Noveum LTD	Indirect evidence	Stafford, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
15	Cerberus Nuclear	Partial evidence	Birchwood, United KingdomHQ checked Sep 17, 2026	11-50	23 contacts →
	Partial evidence “Cerberus Nuclear is a technical consultancy with over 100 cumulative years experience specialising in Radiation Shielding, Criticality Safety and Nuclear Characterisation.” Source: RevenueBase Database · checked Sep 17, 2026
16	Cerap UK	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	11-50	23 contacts →
	Indirect evidence “Established in France over 33 years ago, CERAP Prevention now operates all over the world, employing over 600 people who all work together to support their customers efficiently…” Source: RevenueBase Database · checked Sep 17, 2026
17	AMS Nuclear	Strong evidence	Bridgwater, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Strong evidence “AMS Nuclear Engineering is a specialist Electrical, Control & Instrumentation (EC & I) engineering company supporting organisations across the UK nuclear sector.” Source: RevenueBase Database · checked Sep 17, 2026
18	TRX	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	18 contacts →
	Partial evidence “TRX is a leading nuclear recruitment company with a core focus on helping shape and implement a zero-carbon future.” Source: RevenueBase Database · checked Sep 17, 2026
19	Acuity Engineering	Partial evidence	Corby, United KingdomHQ checked Sep 17, 2026	1-10	10 contacts →
	Partial evidence “Acuity provides consultancy services and technical resource to our clients within the engineering sector.” Source: RevenueBase Database · checked Sep 17, 2026
20	Projecon LTD	Strong evidence	Wigan, United KingdomHQ checked Sep 17, 2026	11-50	9 contacts →
	Strong evidence “ProjEcon is a specialist provider of consultancy services within the Engineering and Nuclear Sectors, skills include Project Management, Engineering Management, Mechanical…” Source: RevenueBase Database · checked Sep 17, 2026
21	Design & Safety Limited	Strong evidence	Saltash, United KingdomHQ checked Sep 17, 2026	11-50	9 contacts →
	Strong evidence “Design and Safety Limited is an engineering consultancy focussed on design and safety management and delivery in the nuclear industry.” Source: RevenueBase Database · checked Sep 17, 2026
22	Naval Solutions	Strong evidence	Bristol, United KingdomHQ checked Sep 17, 2026	11-50	9 contacts →
	Strong evidence “NAVAL SOLUTIONS is a Consultancy company based out of Bristol UK specialising in Naval and Nuclear Engineering.” Source: RevenueBase Database · checked Sep 17, 2026
23	Equilibrion	Indirect evidence	Northampton, United KingdomHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence “Equilibrion is a young, ambitious firm set up for one purpose.” Source: RevenueBase Database · checked Sep 17, 2026
24	Safetech Engineering Limited	Strong evidence	Frome, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Strong evidence “Nuclear Safety and Engineering Helping companies maintain safe, secure and continued operations, whilst complying with stringent, contractual, legal and regulatory requirements in…” Source: RevenueBase Database · checked Sep 17, 2026
25	Firma Engineering LTD	Partial evidence	Rotherham, United KingdomHQ checked Sep 17, 2026	1-10	5 contacts →
	Partial evidence “We are an engineering company established to address the increasing requirement for high integrity detailed structural design and analysis, particularly within heavily regulated…” 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: nuclear facility 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 nuclear facility engineering firms.
Partial evidence: Its own public description names part of nuclear facility engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nuclear facility 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 82 nuclear facility engineering firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,266 reachable decision-makers.

Free signup · no credit card

View the full list →

Nuclear facility engineering firms based in the United Kingdom at a glance

As of Sep 17, 2026

31.6%Verified-email coverage

203.3Average contacts per company

11-50Median size (employees)

11.0%Largest-city concentration · Bristol

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 82 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 nuclear facility 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 “nuclear facility 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 nuclear facility 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 nuclear facility 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, 5,266 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.

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 nuclear facility 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 nuclear facility engineering firms are there based in the United Kingdom?

RevenueBase identified 82 nuclear facility 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?

Atkins, headquartered in Epsom, tops this list with the largest team on record.

Which city has the most nuclear facility engineering firms?

Bristol leads with 9 headquartered companies, followed by London (5) and Warrington (3).

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 5,266 verified decision-maker contacts tracked across these 82 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.

Ready to reach these companies? Verified emails and direct dials for all 82 nuclear facility engineering firms based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Nuclear facility engineering firms by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All Nuclear facility engineering firms lists · New lists

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.