Company lists · Data refreshed September 2026
Top 25 Nuclear engineering consulting firms based in the United Kingdom
RevenueBase identified 163 nuclear engineering consulting firms headquartered in the United Kingdom as of September 2026 and tracks 12,005 professional contacts across them, including 4,008 with verified work emails and 1,148 with mobile numbers. London is the largest hub.
This list covers nuclear engineering 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest nuclear engineering consulting firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 9,297 | ||||
“Atkins is now AtkinsRéalis.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | NSG Environmental LTDPartial evidence | 297 | |||
“We support our clients by delivering safe, practical and efficient solutions to complex nuclear challenges, with a strong focus on disposability.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | Veolia Nuclear SolutionsStrong evidence | 284 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | Framatome UKIndirect evidence | 181 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 169 | ||||
“DBD is an independent global enterprise providing innovative solutions to complex technical, engineering and strategic challenges in highly regulated industries.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 90 | ||||
“Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | Insite Technical ServicesPartial evidence | 89 | |||
“InSite Technical Services is the partner you can rely on to support any engineering requirement.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | JBA EngineeringPartial evidence | 63 | |||
“JBA are industry-leading consultants, providing flexible engineering and design solutions, procurement, and construction services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | PDL GroupPartial evidence | 62 | |||
“PDL are the engineering experts.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 48 | ||||
“Bendalls Engineering has a strong reputation in engineering, located in Carlisle, Cumbria.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | React Engineering LimitedIndirect evidence | 47 | |||
“React brings strategic clarity and delivery leadership to complex challenges in highly regulated sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | JGC Engineering And Technical Services LTDPartial evidence | 42 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | Projex Solutions LimitedIndirect evidence | 36 | |||
“Projex Solutions offers multi-disciplined teams of highly experienced and skilled engineers to help the world's most respected manufacturer's in highly regulated industries.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 35 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 33 | ||||
“CORE Nuclear Solutions is a specialist nuclear remote engineering SME based at Lillyhall in Workington.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Sanderson Watts Associates LTDPartial evidence | 26 | |||
“Sanderson Watts Associates (SWA) is a civil and structural engineering consultancy whose aim is to achieve cost effective and quality design solutions that fulfil our clients’…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | Noveum LTDIndirect evidence | 24 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 | ||||
“Cerberus Nuclear is a technical consultancy with over 100 cumulative years experience specialising in Radiation Shielding, Criticality Safety and Nuclear Characterisation.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | ATT Consultants LTDIndirect evidence | 23 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 21 | ||||
“AMS Nuclear Engineering is a specialist Electrical, Control & Instrumentation (EC & I) engineering company supporting organisations across the UK nuclear sector.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 19 | ||||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 18 | ||||
“ETD Consulting provides independent technical engineering consulting and on-site services, innovative products and high quality training to the Power and Process Plant industries.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 18 | ||||
“Welcome to ENG-CAD Group, an International Project Management, Engineering, Technical and Construction Support Company who specialises in the servicing of the Offshore…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | TRXPartial evidence | 18 | |||
“TRX is a leading nuclear recruitment company with a core focus on helping shape and implement a zero-carbon future.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 163 nuclear engineering consulting firms based in the United Kingdom
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Nuclear engineering consulting firms based in the United Kingdom at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 engineering consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 engineering consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among nuclear engineering 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 an evidence 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, 4,008 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 5, 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
How many nuclear engineering consulting firms are there based in the United Kingdom?
RevenueBase identified 163 nuclear engineering 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?
Atkins, headquartered in Epsom, tops this list with the largest team on record.
Which city has the most nuclear engineering consulting firms?
London leads with 15 headquartered companies, followed by Bristol (10) and Manchester (5).
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 4,008 verified decision-maker contacts tracked across these 163 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 5, 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.
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