# Companies using FEKO

We found 1,610 companies that use FEKO. 388 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts held steady in the three months to August 2026; 527 job posts named it from October 2025 to August 2026. Electrical Engineer is the role that names it most often.

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

## Which companies name FEKO in the most job posts?

Northrop Grumman, Raytheon Technologies and Lockheed Martin are among the companies with the most job posts naming FEKO. Raytheon Technologies is the newest of the five companies in the table, with its first job post naming it in June 2023.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Northrop Grumman](https://sumble.com/orgs/northrop-grumman) | 182 | 23 | "Familiarity with HFSS, CST Microwave Studio, GRASP, FEKO, SENTRi, or other computational electromagnetics software tools" (Staff Engineer RF Microwave Design, Oct 27, 2026) |
| [Raytheon Technologies](https://sumble.com/orgs/raytheon) | 182 | 23 | "Proficiency with modeling & simulation tools such as HFSS, CST, FEKO, SENTRi and GRASP" (Senior Antenna & RF Sensor Test Range Architect & Integrator, Oct 31, 2026) |
| [Lockheed Martin](https://sumble.com/orgs/lockheed-martin) | 150 | 27 | "Proficiency with RF modeling using tools such as Keysight ADS, HFSS, PSPICE, FEKO, SystemVue, CST MW Studio, or AWR Microwave Office" (sr rf engineer, Aug 19, 2026) |
| [SpaceX](https://sumble.com/orgs/spacex) | 96 | 5 | "1+ years of experience using one of the 3D EM simulation tools such as CST, HFSS, FEKO, EMPro, TICRA or XFDTD" (sr. antenna engineer, satellites (starlink), Nov 7, 2026) |
| [Leidos](https://sumble.com/orgs/leidos) | 75 | 4 | "Create signature predictions using CEM prediction software (SENTRi, Xpatch, COMSOL, CST, HFSS, Feko, etc.)" (Senior Signatures Modeling Engineer, Oct 21, 2026) |

## Is hiring for FEKO growing?

FEKO's share of job posts is about the same as three months earlier: 0.29 in every 10,000 job posts from June to August 2026, against 0.29 from March to May. From October to December 2025 it was 0.25.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 38 | 1,413,673 | 0.27 |
| Nov 2025 | 43 | 1,822,119 | 0.24 |
| Dec 2025 | 29 | 1,236,103 | 0.23 |
| Jan 2026 | 42 | 1,828,002 | 0.23 |
| Feb 2026 | 55 | 1,856,647 | 0.30 |
| Mar 2026 | 50 | 1,850,711 | 0.27 |
| Apr 2026 | 52 | 1,728,886 | 0.30 |
| May 2026 | 57 | 1,821,509 | 0.31 |
| Jun 2026 | 53 | 1,909,496 | 0.28 |
| Jul 2026 | 48 | 1,815,180 | 0.26 |
| Aug 2026 | 60 | 1,835,698 | 0.33 |

## How many companies named FEKO in a job post for the first time in recent months?

In the three months to August 2026, 27 companies posted about FEKO for the first time. From March to May, 21 did. The 27 from June to August are 7% of all 388 companies whose job posts name it.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 21 |
| June to August 2026 | 27 |
| October 2025 to August 2026 | 86 |

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 FEKO?

We found 1,610 companies that use FEKO, 1,222 of them through employees' profiles alone. 132 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name FEKO | 388 | 24% |
| Employees' profiles list FEKO | 1,222 | 76% |

## What size are the companies that use FEKO?

38% of FEKO users are companies with 50 to 999 employees, the largest size group. 404 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 16% | 22% |
| 50 to 999 | 38% | 38% |
| 1,000 to 5,000 | 22% | 17% |
| Over 5,000 | 25% | 23% |

## Where are FEKO companies based?

The United States has the most FEKO companies (36%), but Italy stands out: 5.3% of them, against 1.5% on the typical tech page. Its companies are based in 75 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 555 | 36% | 43% |
| India | 108 | 7% | 6.9% |
| France | 89 | 5.8% | 4.6% |
| Germany | 87 | 5.6% | 4.4% |
| United Kingdom | 81 | 5.3% | 6.4% |
| Italy | 81 | 5.3% | 1.5% |

## Which roles mention FEKO most?

FEKO shows up across many roles. The top one, Electrical Engineer, has 26% of the job posts. Telecommunications Engineer is second, at 14%.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Electrical Engineer | 26% | 135 | 44 | 38 |
| Telecommunications Engineer | 14% | 73 | 23 | 19 |
| Hardware Engineer | 7.2% | 38 | 3 | 13 |
| Systems Engineer | 5.1% | 27 | 4 | 6 |
| Chip Designer | 2.7% | 14 | 5 | 3 |
| Integration Engineer | 2.1% | 11 | 4 | 1 |

## Which companies started naming FEKO in job posts recently?

32 companies with 50 or more employees started naming FEKO in job posts between April and August 2026. 8 of them have more than 5,000 employees. Nexio SAS has the most job posts of the new commercial companies, 4 from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Nexio SAS](https://sumble.com/orgs/nexio-9) | 4 |
| Commercial | [Flexcompute](https://sumble.com/orgs/flexcompute) | 3 |
| Commercial | [AIT Austrian Institute of Technology](https://sumble.com/orgs/ait) | 2 |
| Commercial | [IDS Ingegneria Dei Sistemi](https://sumble.com/orgs/ids-ingegneria-sistemi) | 2 |
| Commercial | [Firestorm](https://sumble.com/orgs/firestorm-labs) | 2 |
| Mid-market | [Saint-Gobain Sekurit](https://sumble.com/orgs/saint-gobain-sekurit) | 2 |
| Mid-market | [BAE Systems Australia](https://sumble.com/orgs/bae-systems-australia) | 1 |
| Mid-market | [Universal Scientific Industrial Co., Ltd.](https://sumble.com/orgs/環鴻科技) | 1 |
| Mid-market | [HII Unmanned Systems](https://sumble.com/orgs/hii-unmanned-systems) | 1 |
| Mid-market | [Modern Technology Solutions, Inc. (MTSI)](https://sumble.com/orgs/mtsi) | 1 |
| Enterprise | [UL Solutions](https://sumble.com/orgs/ul-solutions) | 2 |
| Enterprise | [Logitech](https://sumble.com/orgs/logitech) | 2 |
| Enterprise | [NVIDIA](https://sumble.com/orgs/nvidia) | 1 |
| Enterprise | [Amentum](https://sumble.com/orgs/amentum) | 1 |
| Enterprise | [Analog Devices](https://sumble.com/orgs/analog-devices) | 1 |

Companies that named FEKO 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 FEKO companies use?

The tool most tied to FEKO is Microwave Office. 17% of FEKO companies use it, 252 times the usual rate for their size. SpaceWire comes second, 183 times as common as usual, at 11%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Microwave Office | 36 | 17% | 0.07% | 252 times |
| SpaceWire | 23 | 11% | 0.06% | 183 times |
| HFSS | 164 | 76% | 0.42% | 180 times |
| CST | 179 | 83% | 0.48% | 175 times |
| Intel/Altera | 12 | 5.6% | 0.03% | 174 times |
| Ansys HFSS | 72 | 33% | 0.21% | 161 times |
| SPEOS | 13 | 6% | 0.04% | 155 times |
| AWR Microwave Office | 11 | 5.1% | 0.03% | 149 times |

Shares are out of the 215 companies whose job posts name FEKO, 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.