370 companies in our data use O-Calc, and 185 of them name it in job posts they wrote. Its share of job posts held steady in the three months to August 2026; 396 job posts named it from October 2025 to August 2026. Skilled Trades is the role that names it most often.
Which companies name O-Calc in the most job posts?
Leidos, Sigma Technologies, Ltd. and The Davey Tree Expert Company are among the companies with the most job posts naming O-Calc. All five companies are in Professional Services.
CompanyPostsPeopleRecent job post
LeidosProfessional Services · first seen Jul 20223748
"Experience with distribution design tools such as BOUD, Pole Foreman, Spida-Calc, O-Calc, DDS and SAP"Distribution Engineering Supervisor, Oct 27, 2026
Sigma Technologies, Ltd.Professional Services · first seen Mar 20242665
"Use design platforms such as DDS, AutoCAD, MicroStation, Katapult, O-Calc, GIS, or utility-specific systems"power designer - field, Oct 27, 2026
The Davey Tree Expert CompanyProfessional Services · first seen Sep 20221200
"Some of these include: AutoCAD/ARCGIS, Spida Calc, O-Calc, or Katapult"Utility Designer 1 | DRG Midwest | UAM Make Ready Engineering, Sep 11, 2024
Orbital Engineering, Inc.Professional Services · first seen Sep 2022742
"Experience in pole loading (Spida Calc, O-Calc, Pole Foreman, or Katapult) or other construction modeling software (AutoCAD, DDS) is beneficial"Distribution Designer - Pennsylvania, Nov 7, 2026
E2 Consulting Engineers, LPProfessional Services · first seen Sep 2022620
"Design distribution projects with neatness and a small margin for error utilizing PLS-CADD, O-Calc, SPIDA-Calc, or Pole Foreman software."Associate Distribution Engineer, Oct 1, 2026
O-Calc's share of job posts is about the same as three months earlier: 0.20 in every 10,000 job posts from June to August 2026, against 0.21 from March to May. Its busiest month was April 2026, at 0.36.
Show the data
Month
Job posts naming O-Calc
All job posts
Per 10,000
Oct 2025
24
1,413,673
0.17
Nov 2025
34
1,822,119
0.19
Dec 2025
31
1,236,103
0.25
Jan 2026
49
1,828,002
0.27
Feb 2026
29
1,856,647
0.16
Mar 2026
26
1,850,711
0.14
Apr 2026
63
1,728,886
0.36
May 2026
27
1,821,509
0.15
Jun 2026
29
1,909,496
0.15
Jul 2026
42
1,815,180
0.23
Aug 2026
42
1,835,698
0.23
How many companies named O-Calc in a job post for the first time in recent months?
Job posts named O-Calc for the first time at 5 companies from June to August 2026, against 7 from March to May. From October 2025 to August 2026, 20 companies named it in a job post for the first time.
March to May 20267
June to August 20265
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 O-Calc?
The evidence for O-Calc is close to even: 50% of these companies name it in job posts, and 50% come from employees' profiles. 47 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name O-Calc
18550%
Employees' profiles list O-Calc
18550%
370 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use O-Calc?
The largest group of O-Calc users is companies with 50 to 999 employees (49%), more than on the typical tech page. 50 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
18%22%
50 to 999
49%38%
1,000 to 5,000
19%17%
Over 5,000
14%23%
Where are O-Calc companies based?
O-Calc is concentrated in the United States, home to 82% of the companies that use it. Its companies are based in 19 countries and territories.
ShareTypical
United States
82%43%
India
6.9%6.9%
Canada
4%3.6%
United Kingdom
1.4%6.4%
Indonesia
0.86%0.64%
Brazil
0.57%2.8%
Companies in 19 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
287
82%
43%
India
24
6.9%
6.9%
Canada
14
4%
3.6%
United Kingdom
5
1.4%
6.4%
Indonesia
3
0.86%
0.64%
Brazil
2
0.57%
2.8%
Which teams work with O-Calc?
O-Calc work is spread across teams. Engineering leads, at 9 companies.
TeamCompanies
Engineering
9
Distribution
8
Design
5
Upland design
5
Telecommunications
4
Distribution engineering
3
What else do O-Calc companies use?
Compared with companies of the same size, O-Calc companies stand out for using PoleForeman and SpidaCalc. MFAD is 412 times as common as usual, at 22%.
Share of the 138 O-Calc companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming O-Calc in job posts recently?
7 companies with 50 or more employees picked up O-Calc in their job posts from April to August 2026. Among the new commercial companies, Resonetics posted the most jobs naming it: 5.
Companies that named O-Calc 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 O-Calc most?
Skilled Trades is the most common role, in 28% of job posts naming O-Calc. The top four roles cover 65% of these job posts.
RoleSharePosts
Skilled Trades
28%111
Power Engineer
24%94
Civil Designer
9.3%37
Program Manager
4%16
Mechanical Designer
3.8%15
Telecommunications Engineer
3.5%14
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Skilled Trades
28%
111
25
39
Power Engineer
24%
94
39
21
Civil Designer
9.3%
37
11
7
Program Manager
4%
16
3
6
Mechanical Designer
3.8%
15
5
3
Telecommunications Engineer
3.5%
14
2
4
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.
