Company lists · Data refreshed November 2026

Top 16 Nuclear licensing software companies based in the United States

RevenueBase identified 37 company matches for nuclear licensing software companies associated with the United States as of November 2026 and tracks 1,027 professional contacts across them, including 344 with verified work emails. Gaithersburg is the largest hub.

This list covers company matches for nuclear licensing software companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built
37Companies
1,027Contacts tracked
344Verified emails
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The 16 largest nuclear licensing software companies based in the United States

Ranked by team size
Top 16 of 37 company matches for nuclear licensing software companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchColumbia, MD, United StatesHQ recorded Nov 5, 2026201-500451 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchCharlotte, TN, United StatesHQ recorded Nov 5, 202651-200120 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchLatrobe, PA, United StatesHQ recorded Nov 5, 2026201-50050 contacts →

Exact match

“Established in 1987, Master-Lee Energy Services was founded to provide the commercial Nuclear Power Industry with engineering, reactor services, decontamination, Reactor Coolant…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchRockville, MD, United StatesHQ recorded Nov 5, 202651-20049 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchKnoxville, TN, United StatesHQ recorded Nov 5, 202651-20046 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchOak Ridge, TN, United StatesHQ recorded Nov 5, 202651-20037 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchPeekskill, NY, United StatesHQ recorded Nov 5, 202611-5034 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchIdaho Falls, United StatesHQ recorded Nov 5, 202651-20033 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchMoon Township, PA, United StatesHQ recorded Nov 5, 2026201-50017 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchCrystal River, FL, United StatesHQ recorded Nov 5, 202611-5017 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchSycamore, IL, United StatesHQ recorded Nov 5, 202611-509 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchRockdale, IL, United StatesHQ recorded Nov 5, 20261-106 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchRoanoke, VA, United StatesHQ recorded Nov 5, 20261-105 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchLynchburg, VA, United StatesHQ recorded Nov 5, 20261-105 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchDowners Grove, United StatesHQ recorded Nov 5, 20261-104 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchCharlotte, NC, United StatesHQ recorded Nov 5, 20261-102 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 16 of 37 nuclear licensing software companies based in the United States

See the full list, filter by size, metro and specialty, and access 344 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Nov 5, 2026
33.5%Verified-email coverage
27.8Average contacts per company
11-50Median size (employees)
5.4%Largest-city concentration · Gaithersburg
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
13
11-50
12
51-200
9
201-500
3

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 37 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “nuclear licensing software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 344 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “nuclear licensing software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nuclear licensing software companies are there based in the United States?

RevenueBase identified 37 company matches for nuclear licensing software companies associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

GSE Solutions tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most nuclear licensing software companies?

Gaithersburg leads with 2 company records, followed by Idaho Falls (2) and Oak Ridge (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 344 professional contacts with verified work emails tracked across these 37 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 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.