Company lists · Data refreshed September 2026

Top 15 Nuclear licensing software companies based in the United States

RevenueBase identified 35 nuclear licensing software companies headquartered in the United States as of September 2026 and tracks 888 professional contacts across them, including 319 with verified work emails and 420 with mobile numbers. Charlotte is the largest hub.

This list covers nuclear licensing software companies headquartered in the United States, 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 5, 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 5, 2026 86% judged on-target in blind review
35Companies
888Contacts tracked
319Verified emails
420Mobile numbers
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The 15 largest nuclear licensing software companies based in the United States

Ranked by team size
Top 15 of 35 nuclear licensing software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to nuclear licensing software 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceColumbia, MD, United StatesHQ checked Sep 5, 2026201-500404 contacts →

Strong evidence

“GSE Solutions supports nuclear power and clean-energy fleets worldwide through integrated engineering services and software that strengthen operational performance.”

Source: RevenueBase Database · checked Sep 5, 2026
2Partial evidenceCharlotte, NC, United StatesHQ checked Sep 5, 202651-200118 contacts →

Partial evidence

“At Atkins Nuclear Solutions US, we offer client solutions crafted by the best engineers and specialists in the industry, served with truly exceptional customer service.”

Source: RevenueBase Database · checked Sep 5, 2026
3Partial evidenceRockville, MD, United StatesHQ checked Sep 5, 202651-20047 contacts →

Partial evidence

“EXCEL has evolved over the last four decades to meet the needs of the nuclear energy industry.”

Source: RevenueBase Database · checked Sep 5, 2026
4Partial evidenceKnoxville, TN, United StatesHQ checked Sep 5, 202651-20042 contacts →

Partial evidence

“Analysis and Measurement Services Corporation (AMS) is a nuclear engineering consulting firm and recognized market leader in providing the worldwide nuclear power industry with…”

Source: RevenueBase Database · checked Sep 5, 2026
5Partial evidenceOak Ridge, TN, United StatesHQ checked Sep 5, 202651-20036 contacts →

Partial evidence

“At Paschal Solutions, we are more than engineers-we are problem solvers, innovators, and trusted partners in providing nuclear safety and specialized nuclear engineering technical…”

Source: RevenueBase Database · checked Sep 5, 2026
6Indirect evidencePeekskill, NY, United StatesHQ checked Sep 5, 202611-5033 contacts →

Indirect evidence

“Founded in 1979 and now an EnergySolutions company, WMG, Inc.”

Source: RevenueBase Database · checked Sep 5, 2026
7Strong evidenceIdaho Falls, United StatesHQ checked Sep 5, 202651-20032 contacts →

Strong evidence

“Studsvik Scandpower Group is a subsidiary of Studsvik AB (STO:SVIK), and specializes in nuclear engineering simulation software that enables nuclear engineers to design nuclear…”

Source: RevenueBase Database · checked Sep 5, 2026
8Partial evidenceMoon Township, PA, United StatesHQ checked Sep 5, 2026201-50014 contacts →

Partial evidence

“PKMJ is an organization of experienced personnel dedicated to supporting the Nuclear Power Industry.”

Source: RevenueBase Database · checked Sep 5, 2026
9Partial evidenceFramingham, MA, United StatesHQ checked Sep 5, 202651-20012 contacts →

Partial evidence

“EPM is a multi-discipline engineering company that provides cost-effective solutions for safe and reliable operation of nuclear power plants.”

Source: RevenueBase Database · checked Sep 5, 2026
10Indirect evidenceSt Louis, MO, United StatesHQ checked Sep 5, 202611-5011 contacts →

Indirect evidence

“Whether your goal is to maintain an existing reactor, decommission an old reactor, or design a new one, TransWare Enterprises Inc.”

Source: RevenueBase Database · checked Sep 5, 2026
11Partial evidenceRockdale, IL, United StatesHQ checked Sep 5, 20261-107 contacts →

Partial evidence

“Radiological Solutions (RSI) is a nuclear engineering and consulting firm specializing in water chemistry optimization, radiological dose management, gamma scanning, and…”

Source: RevenueBase Database · checked Sep 5, 2026
12Indirect evidenceRoanoke, VA, United StatesHQ checked Sep 5, 20261-105 contacts →

Indirect evidence

“Robatel Technologies was established in 2009 as the US subsidiary of Robatel SA.”

Source: RevenueBase Database · checked Sep 5, 2026
13Indirect evidenceLynchburg, VA, United StatesHQ checked Sep 5, 20261-105 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 5, 2026
14Partial evidenceDowners Grove, United StatesHQ checked Sep 5, 20261-103 contacts →

Partial evidence

“Inservice Engineering is celebrating its 20th year of providing quality engineering services to the nuclear industry!”

Source: RevenueBase Database · checked Sep 5, 2026
15Partial evidenceCharlotte, NC, United StatesHQ checked Sep 5, 20261-102 contacts →

Partial evidence

“Provides engineering services to nuclear utilities and related industries.”

Source: RevenueBase Database · checked Sep 5, 2026

Showing 15 of 35 nuclear licensing software companies based in the United States

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Nuclear licensing software companies based in the United States at a glance

As of Sep 5, 2026
35.9%Verified-email coverage
47.3%Mobile-number coverage
25.4Average contacts per company
11-50Median size (employees)
5.7%Largest-city concentration · Charlotte
Sep 5, 2026Page data refreshed

Companies by employee count

1-10
13
11-50
10
51-200
10
201-500
2

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 licensing software 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.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “nuclear licensing software 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 licensing software 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 licensing software companies, and records with no verified work email. Companies headquartered outside United States 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, 319 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

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 licensing software 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 licensing software companies are there based in the United States?

RevenueBase identified 35 nuclear licensing software companies headquartered in the United States 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?

GSE Solutions, headquartered in Columbia, tops this list with the largest team on record.

Which city has the most nuclear licensing software companies?

Charlotte leads with 2 headquartered companies, followed by Framingham (2) and Gaithersburg (2).

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 319 verified decision-maker contacts tracked across these 35 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 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.