# Companies using O-Calc

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.

Data as of November 9, 2026. Source: Sumble.

## 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.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Leidos](https://sumble.com/orgs/leidos) | 374 | 8 | "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.](https://sumble.com/orgs/sigma-technologies,-ltd.) | 266 | 5 | "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 Company](https://sumble.com/orgs/davey-tree) | 120 | 0 | "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.](https://sumble.com/orgs/orbital-engineering) | 74 | 2 | "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, LP](https://sumble.com/orgs/e2-consulting-engineers) | 62 | 0 | "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) |

## Is hiring for O-Calc growing?

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.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| 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.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 7 |
| June to August 2026 | 5 |
| October 2025 to August 2026 | 20 |

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 know | Companies | Share |
|---|---:|---:|
| Job posts name O-Calc | 185 | 50% |
| Employees' profiles list O-Calc | 185 | 50% |

## 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.

| Size | Share | Typical tech page |
|---|---:|---:|
| 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.

| 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.

| Team | Companies |
|---|---:|
| Engineering | 9 |
| Distribution | 8 |
| Design | 5 |
| Upland design | 5 |
| Telecommunications | 4 |
| Distribution engineering | 3 |

## 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.

| 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 |

## 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.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Resonetics](https://sumble.com/orgs/resonetics,-llc) | 5 |
| Commercial | [Cobb, Fendley & Associates, Inc.](https://sumble.com/orgs/cobbfendley) | 2 |
| Commercial | [AES Indiana](https://sumble.com/orgs/aesindiana) | 2 |
| Commercial | [Resilient Structures](https://sumble.com/orgs/resilient-structures-com) | 2 |
| Commercial | [Turner Mining Group](https://sumble.com/orgs/turner-mining-group) | 2 |

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.

## 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%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| PoleForeman | 50 | 36% | 0.04% | 946 times |
| SpidaCalc | 75 | 54% | 0.06% | 857 times |
| MFAD | 31 | 22% | 0.05% | 412 times |
| PLS-POLE | 47 | 34% | 0.12% | 279 times |
| ASPEN Oneliner | 21 | 15% | 0.07% | 226 times |
| PLS-Tower | 29 | 21% | 0.11% | 197 times |
| PLS-CADD | 73 | 53% | 0.33% | 158 times |
| Enercalc | 22 | 16% | 0.11% | 146 times |

Shares are out of the 138 companies whose job posts name O-Calc, not counting firms whose job posts name almost every technology.

## 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.