Company lists · Data refreshed September 2026
Top 25 Nuclear remediation contractors worldwide
RevenueBase identified 690 nuclear remediation contractors worldwide as of September 2026 and tracks 27,459 professional contacts across them, including 7,926 with verified work emails and 0 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.
This list covers nuclear remediation contractors 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 17, 2026. Country and city lists for nuclear remediation contractors 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.
The 25 largest nuclear remediation contractors worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,537 contacts → | ||||
Indirect 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 17, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 6 | 468 contacts → | ||||
Partial 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 17, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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, 2026Thanks. The Data Team will review it. | |||||
| 9 | 293 contacts → | ||||
Indirect evidence “Founded in 1985 and a distinguished part of ARMADA Parent Inc, established itself as a premier marine preservation company, delivering an extensive suite of services to…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 11 | 279 contacts → | ||||
Indirect 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 17, 2026Thanks. The Data Team will review it. | |||||
| 12 | 277 contacts → | ||||
Indirect evidence “Sevenson Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 13 | 264 contacts → | ||||
Indirect evidence “Augean specialises in managing hard to handle wastes.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 14 | 254 contacts → | ||||
Partial evidence “Alliance is one of the most experienced and trusted environmental contractors in California.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 17, 2026Thanks. The Data Team will review it. | |||||
| 16 | 233 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 17 | 225 contacts → | ||||
Indirect evidence “Envirocon safely and reliably delivers projects that protect, remediate, and restore our environment for commercial and government clients nationwide.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 18 | 201 contacts → | ||||
Indirect evidence “A GEOAMBIENTE Geologia e Engenharia Ambiental atua no Gerenciamento de Áreas Contaminadas provendo soluções em Diagnóstico de Passivos Ambientais e Remediação de Solo e Água…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 19 | 200 contacts → | ||||
Partial evidence “American Integrated Services, Inc.(AIS) offers comprehensive solutions through environmental construction and remediation, industrial demolition, abatement, 24/7 emergency…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 20 | 187 contacts → | ||||
Partial evidence “Bay West is an environmental and industrial services provider for site investigations, groundwater and soil remediation, munitions cleanup, hazardous waste management, industrial…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 21 | 180 contacts → | ||||
Indirect evidence “Depuis 1983, SERPOL est une entreprise engagée au service de l’environnement et de ses clients.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 22 | 180 contacts → | ||||
Partial evidence “Longenecker & Associates: A Geosyntec Company (L&A) has more than 35 years’ experience supporting the national security, environmental remediation, scientific research and energy…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 23 | 162 contacts → | ||||
Partial evidence “Spectra Tech is an engineering, environmental, and nuclear services company that focuses on providing high quality and cost-effective technical solutions for our Federal…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 24 | 138 contacts → | ||||
Indirect evidence “The World’s Most Comprehensive Facility & Environmental Solutions Company - We Bring Answers.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 25 | 136 contacts → | ||||
Indirect evidence “The EE & G Group dates back to 1986 and has been in business for over 33 years.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
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 remediation contractors. 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 remediation contractors.
- Partial evidence
- Its own public description names part of nuclear remediation contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name nuclear remediation contractors. 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 690 nuclear remediation contractors worldwide
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Nuclear remediation contractors worldwide at a glance
As of Sep 17, 2026Companies by employee count
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 remediation contractors, 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
- 7 countries, largest first: the United States, France, Italy, the United Kingdom, Germany, Canada, Brazil. Country and city lists for nuclear remediation contractors are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “nuclear remediation contractors”. 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 remediation contractors), 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 remediation contractors, 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, 7,926 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.
Nuclear remediation contractors by location
7 lists · largest firstEvery Nuclear remediation contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Nuclear remediation contractors based in the United States365
- Nuclear remediation contractors based in France82
- Nuclear remediation contractors based in Italy64
- Nuclear remediation contractors based in the United Kingdom56
- Nuclear remediation contractors based in Germany49
- Nuclear remediation contractors based in Canada46
- Nuclear remediation contractors based in Brazil28
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 remediation contractors, 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 remediation contractors are there worldwide?
RevenueBase identified 690 nuclear remediation contractors 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?
Orano DS, headquartered in Massy, tops this list with the largest team on record.
Which country has the most nuclear remediation contractors?
The United States leads with 365 companies, followed by France (82) and Italy (64). Every nuclear remediation contractors list by country and city is linked on this page.
Which city has the most nuclear remediation contractors?
Sao Paulo leads with 11 headquartered companies, followed by Oak Ridge (9) and Richland (9).
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 7,926 verified decision-maker contacts tracked across these 690 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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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.