Company lists · Data refreshed September 2026

Top 25 Nuclear site remediation companies worldwide

Name: Nuclear site remediation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,254 companies tracked

RevenueBase identified 1,254 nuclear site remediation companies worldwide as of September 2026 and tracks 47,920 professional contacts across them, including 12,735 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers nuclear site remediation companies worldwide, 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 20, 2026. Country and city lists for nuclear site remediation companies follow the table.

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 20, 2026 86% judged on-target in blind review

1,254Companies

47,920Contacts tracked

12,735Verified emails

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The 25 largest nuclear site remediation companies worldwide

Ranked by team size

Top 25 of 1,254 nuclear site remediation companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to nuclear site remediation companies: 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	BWXT	Indirect evidence	Lynchburg, VA, United StatesHQ checked Sep 20, 2026	5,001-10,000	3,832 contacts →
	Indirect evidence “At BWX Technologies, Inc.(NYSE: BWXT), we are People Strong, Innovation Driven.” Source: RevenueBase Database · checked Sep 20, 2026
2	Orano DS	Indirect evidence	Massy, FranceHQ checked Sep 20, 2026	5,001-10,000	1,684 contacts →
	Indirect evidence “Orano DS fait partie du Groupe Orano, le fournisseur de référence du cycle du combustible nucléaire.” Source: RevenueBase Database · checked Sep 20, 2026
3	Onet Technologies	Partial evidence	Marseille, FranceHQ checked Sep 20, 2026	1,001-5,000	1,664 contacts →
	Partial evidence “Onet Technologies has 40 years of experience in the nuclear industry, with a strong expertise in engineering and services for reactor maintenance; dismantling, decommissioning and…” Source: RevenueBase Database · checked Sep 20, 2026
4	Cavendish Nuclear	Partial evidence	Birchwood, United KingdomHQ checked Sep 20, 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 20, 2026
5	NUVIA	Partial evidence	Rueil Malmaison, FranceHQ checked Sep 20, 2026	1,001-5,000	1,537 contacts →
	Partial evidence “Subsidiary of the world-leading VINCI group, NUVIA is an international company that has been operating on highly regulated and sensitive industrial sites for over 60 years.” Source: RevenueBase Database · checked Sep 20, 2026
6	Energysolutions	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,254 contacts →
	Partial evidence “EnergySolutions is an international nuclear services company headquartered in Salt Lake City, Utah, and Charlotte, North Carolina, with operations across the United States and…” Source: RevenueBase Database · checked Sep 20, 2026
7	Spie Nucléaire	Indirect evidence	Cergy-pontoise Cedex, FranceHQ checked Sep 20, 2026	1,001-5,000	1,079 contacts →
	Indirect evidence “À propos de SPIE Nucléaire Filiale de SPIE France, SPIE Nucléaire est le partenaire de référence multi-technique dans la conception, la réalisation, les travaux de modification…” Source: RevenueBase Database · checked Sep 20, 2026
8	Tecnatom	Partial evidence	San Sebastian De Los Reyes, SpainHQ checked Sep 20, 2026	501-1,000	487 contacts →
	Partial evidence “TECNATOM was set up in 1957 as a Spanish engineering company specialising in guaranteeing the operation and maintenance of nuclear power plants to the highest levels of safety.” Source: RevenueBase Database · checked Sep 20, 2026
9	Navarro Research And Engineering	Indirect evidence	Oak Ridge, TN, United StatesHQ checked Sep 20, 2026	201-500	468 contacts →
	Indirect evidence “Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with our clients to overcome their most challenging environmental, technical, and…” Source: RevenueBase Database · checked Sep 20, 2026
10	Clean Harbors India	Indirect evidence	Hyderabad, IndiaHQ checked Sep 20, 2026	1,001-5,000	450 contacts →
	Indirect evidence “Clean Harbors India has been strategically established as the Global Capability Center (GCC) to serve our parent company.” Source: RevenueBase Database · checked Sep 20, 2026
11	Cyclife	Partial evidence	Paris La Défense Cedex, FranceHQ checked Sep 20, 2026	1,001-5,000	440 contacts →
	Partial evidence “As a European pioneer, Cyclife group offers integrated servicing in nuclear decommissioning and dismantling radioactive waste management.” Source: RevenueBase Database · checked Sep 20, 2026
12	Hydrogeologic, INC	Partial evidence	Reston, VA, United StatesHQ checked Sep 20, 2026	501-1,000	430 contacts →
	Partial evidence “HydroGeoLogic, Inc.(HGL) is an employee-owned company with over 36 years of experience developing innovative, effective, and sustainable engineering and remediation solutions to…” Source: RevenueBase Database · checked Sep 20, 2026
13	Enusa Industrias Avanzadas, S.A., S.M.E	Partial evidence	Madrid, SpainHQ checked Sep 20, 2026	501-1,000	345 contacts →
	Partial evidence “Se ocupa de la primera parte del ciclo de combustible nuclear (diseño, fabricación y abastecimiento de combustible) prestando servicios de ingeniería y combustible a las Centrales…” Source: RevenueBase Database · checked Sep 20, 2026
14	NSG Environmental LTD	Partial evidence	Chorley, United KingdomHQ checked Sep 20, 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 20, 2026
15	Veolia Nuclear Solutions	Partial evidence	Abingdon, United KingdomHQ checked Sep 20, 2026	501-1,000	284 contacts →
	Partial 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 20, 2026
16	Valgo Groupe	Partial evidence	Paris, FranceHQ checked Sep 20, 2026	501-1,000	279 contacts →
	Partial evidence “VALGO - Régénérer, Rénover, Revaloriser Entreprise internationale spécialisée dans la réhabilitation des sites pollués, VALGO transforme les sols, bâtiments et infrastructures…” Source: RevenueBase Database · checked Sep 20, 2026
17	Sevenson Environmental Services INC	Indirect evidence	Niagara Falls, NY, United StatesHQ checked Sep 20, 2026	501-1,000	277 contacts →
	Indirect evidence “Sevenson Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
18	Environmental Restoration LLC	Strong evidence	Saint Louis, MO, United StatesHQ checked Sep 20, 2026	201-500	273 contacts →
	Strong evidence “Environmental Restoration LLC (ER) is 100% employee-owned and provides Environmental Site Remediation, Construction and Emergency Response services for hazardous waste materials…” Source: RevenueBase Database · checked Sep 20, 2026
19	Augean	Indirect evidence	Wetherby, United KingdomHQ checked Sep 20, 2026	501-1,000	264 contacts →
	Indirect evidence “Augean specialises in managing hard to handle wastes.” Source: RevenueBase Database · checked Sep 20, 2026
20	Enviropacific	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 20, 2026	201-500	260 contacts →
	Indirect evidence “Enviropacific is committed to working towards creating safer environments and sustainable communities.” Source: RevenueBase Database · checked Sep 20, 2026
21	Alliance Environmental Group, LLC	Indirect evidence	Azusa, CA, United StatesHQ checked Sep 20, 2026	501-1,000	254 contacts →
	Indirect evidence “Alliance is one of the most experienced and trusted environmental contractors in California.” Source: RevenueBase Database · checked Sep 20, 2026
22	Canberra Industries	Partial evidence	United StatesHQ checked Sep 20, 2026	1,001-5,000	254 contacts →
	Partial evidence “CANBERRA, now a part of Mirion Technologies, is a leading provider of innovative and cost-effective nuclear measurement solutions used to maintain safety of personnel, assess the…” Source: RevenueBase Database · checked Sep 20, 2026
23	QM Environmental	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	201-500	253 contacts →
	Indirect evidence “QM Environmental is a leading Canadian environmental and industrial services provider, trusted for over three decades to deliver complex projects safely, responsibly, and with…” Source: RevenueBase Database · checked Sep 20, 2026
24	GNS Gesellschaft FÜR Nuklear-Service MBH	Indirect evidence	Essen, GermanyHQ checked Sep 20, 2026	501-1,000	235 contacts →
	Indirect evidence “Seit fünf Jahhrzehnten bietet GNS Gesellschaft für Nuklear-Service mbH zuverlässige und effiziente Lösungen zur nuklearen Entsorgung während Betrieb, und Rückbau von…” Source: RevenueBase Database · checked Sep 20, 2026
25	Paragon Energy Solutions	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 20, 2026	201-500	234 contacts →
	Partial evidence “Paragon tackles the most difficult challenges of the nuclear industry-those faced by the current operating fleet as well as the next generation of advanced reactors.” Source: RevenueBase Database · checked Sep 20, 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 site remediation companies. 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 site remediation companies.
Partial evidence: Its own public description names part of nuclear site remediation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nuclear site remediation companies. 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 1,254 nuclear site remediation companies worldwide

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Nuclear site remediation companies worldwide at a glance

As of Sep 20, 2026

26.6%Verified-email coverage

38.2Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

406

11-50

439

51-200

234

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 site remediation companies, 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.
Coverage: Every country. Country and city lists for nuclear site remediation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “nuclear site remediation companies”. 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 site remediation companies), 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 site remediation companies, and records with no verified work email.
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, 12,735 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 20, 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.

Nuclear site remediation companies by location

7 lists · largest first

Every Nuclear site remediation companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 site remediation companies, 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 site remediation companies are there worldwide?

RevenueBase identified 1,254 nuclear site remediation companies worldwide 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?

BWXT, headquartered in Lynchburg, tops this list with the largest team on record.

Which country has the most nuclear site remediation companies?

The United States leads with 454 companies, followed by Italy (101) and France (98). Every nuclear site remediation companies list by country and city is linked on this page.

Which city has the most nuclear site remediation companies?

Sao Paulo leads with 20 headquartered companies, followed by Oak Ridge (14) and Albuquerque (10).

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 12,735 verified decision-maker contacts tracked across these 1,254 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 20, 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.