471 companies in our data use Serpent, and 92 of them name it in job posts they wrote. From October 2025 to August 2026, 144 job posts named it. Nuclear Engineer is the role that names it most often.
Which companies name Serpent in the most job posts?
The five companies with the most job posts naming Serpent are Framatome, Oak Ridge National Laboratory, Westinghouse Electric Company, Terrestrial Energy and Hadron Energy, Inc. Of the five companies in the table, Framatome has the most employees who list it on their profiles: 20.
CompanyPostsPeopleRecent job post
FramatomeUtilities · first seen Sep 20227020
"You have some experience in computer model development and application (e.g., SCALE, SERPENT, MCNP, or other nuclear industry analysis code)."Fluence & Radiological Engineer, Sep 20, 2025
Oak Ridge National LaboratoryPublic Administration · first seen Mar 2023415
"…models using world-class modeling and simulation codes (SCALE, VERA, OpenMC, MCNP, Serpent, MOOSE) to support the design and development of next generation nuclear reactors."Advanced Nuclear Reactor and Fuel Cycle Engineer (Associate), Oct 27, 2026
Westinghouse Electric CompanyUtilities · first seen Sep 2022406
"Expert experience with Monte Carlo nuclear analysis codes such as Serpent, MCNP, and SCALE and working knowledge for other codes such as Griffin and Bison."Lead - Nuclear Design Engineer, Jul 27, 2025
Terrestrial Energyfirst seen Sep 2025280
"Knowledge of neutronics codes (MCNP, SCALE, Serpent, or similar)"Nuclear Safety Analysis Manager, Aug 27, 2026
Hadron Energy, Inc.first seen Feb 2025270
"Experience with activation, depletion, and source term characterization codes (e.g., SCALE/ORIGEN, Serpent)"Radiation Effects & Shielding Specialist, Jul 28, 2026
From March to May 2026, 0.06 in every 10,000 job posts named Serpent; from June to August, 0.08 in every 10,000 job posts. These are small numbers of job posts, so a few companies can move them.
Show the data
Month
Job posts naming Serpent
All job posts
Per 10,000
Oct 2025
14
1,413,673
0.10
Nov 2025
20
1,822,119
0.11
Dec 2025
5
1,236,103
0.04
Jan 2026
14
1,828,002
0.08
Feb 2026
15
1,856,647
0.08
Mar 2026
9
1,850,711
0.05
Apr 2026
15
1,728,886
0.09
May 2026
8
1,821,509
0.04
Jun 2026
11
1,909,496
0.06
Jul 2026
13
1,815,180
0.07
Aug 2026
20
1,835,698
0.11
How many companies named Serpent in a job post for the first time in recent months?
From June to August 2026, 10 companies posted their first job naming Serpent; 3 did from March to May. Of the 92 companies whose job posts name it, 11% first named it from June to August.
March to May 20263
June to August 202610
October 2025 to August 202620
Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.
How do we know which companies use Serpent?
Of the 471 companies here, 379 are known from what employees list on their profiles. 92 name it in their own job posts.
How we knowCompaniesShare
Job posts name Serpent
9220%
Employees' profiles list Serpent
37980%
471 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use Serpent?
By size, Serpent users are close to the typical tech page; companies with 50 to 999 employees are the largest group (35%). 109 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
23%22%
50 to 999
35%38%
1,000 to 5,000
19%17%
Over 5,000
23%23%
Where are Serpent companies based?
Beyond the United States (35%), Serpent is unusually common in France, at 18% of its companies. Its companies are based in 48 countries and territories.
ShareTypical
United States
35%43%
France
18%4.6%
United Kingdom
6.7%6.4%
Sweden
3.6%1%
Canada
3.3%3.6%
India
2.9%6.9%
Companies in 48 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
156
35%
43%
France
79
18%
4.6%
United Kingdom
30
6.7%
6.4%
Sweden
16
3.6%
1%
Canada
15
3.3%
3.6%
India
13
2.9%
6.9%
Which companies started naming Serpent in job posts recently?
Between April and August 2026, Serpent appeared for the first time in job posts at 5 companies: 3 commercial, 1 mid-market and 1 enterprise.
Companies that named Serpent in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.
Which roles mention Serpent most?
Nuclear Engineer and Safety Engineer roles account for 53% of the job posts that name Serpent. The top four roles cover 64% of these job posts.
RoleSharePosts
Nuclear Engineer
36%52
Safety Engineer
17%25
Engineer
6.2%9
Environmental Health & Safety
4.2%6
Skilled Trades
4.2%6
Researcher
3.5%5
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Nuclear Engineer
36%
52
9
20
Safety Engineer
17%
25
5
6
Engineer
6.2%
9
2
2
Environmental Health & Safety
4.2%
6
0
0
Skilled Trades
4.2%
6
1
1
Researcher
3.5%
5
0
3
About this data
Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.
Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.
Sumble has a free plan, and the same data is available through its API and MCP server.
A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.
Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.
