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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 · Markdown version

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 Posts People Recent job post
Northrop Grumman Manufacturing · first seen Jul 2022 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 Manufacturing · first seen Jun 2023 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 Manufacturing · first seen Aug 2022 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 Manufacturing · first seen Sep 2022 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 Professional Services · first seen Aug 2022 75 4 "Create signature predictions using CEM prediction software (SENTRi, Xpatch, COMSOL, CST, HFSS, Feko, etc.)"Senior Signatures Modeling Engineer, Oct 21, 2026
Showing 1 to 5 of 388 companies with job posts Sign up to see all companies using FEKO ›

What else do we know about FEKO?

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.
Share of job posts naming FEKO by month, October 2025 to August 2026, in job posts in every 10,000 Moves from 0.27 in October 2025 to 0.33 in August 2026, in job posts in every 10,000. 0.38 0.28 0.19 0.09 0 0.33 Oct '25 Nov Dec Jan '26 Feb Mar Apr May Jun Jul Aug
Show the data
MonthJob posts naming FEKOAll job postsPer 10,000
Oct 2025381,413,6730.27
Nov 2025431,822,1190.24
Dec 2025291,236,1030.23
Jan 2026421,828,0020.23
Feb 2026551,856,6470.30
Mar 2026501,850,7110.27
Apr 2026521,728,8860.30
May 2026571,821,5090.31
Jun 2026531,909,4960.28
Jul 2026481,815,1800.26
Aug 2026601,835,6980.33

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.
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%

1,610 companies. Each is counted once, under the strongest evidence we have for it.

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.

Share of its companies Typical tech page

ShareTypical
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.
ShareTypical
United States
36% 43%
India
7% 6.9%
France
5.8% 4.6%
Germany
5.6% 4.4%
United Kingdom
5.3% 6.4%
Italy
5.3% 1.5%

Companies in 75 countries and territories. Shares are of companies with a known headquarters country.

Show the data
CountryCompaniesShareTypical tech page
United States55536%43%
India1087%6.9%
France895.8%4.6%
Germany875.6%4.4%
United Kingdom815.3%6.4%
Italy815.3%1.5%

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%.

Share of the 215 FEKO companies counted here whose job posts also name the tool Typical for companies the same size

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

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.
AI native any size · 1 new
Company Posts
Helsing 2
Commercial 50 to 999 employees · 15 new
Company Posts
Nexio SAS 4
Flexcompute 3
AIT Austrian Institute of Technology 2
IDS Ingegneria Dei Sistemi 2
Firestorm 2
Mid-market 1,000 to 5,000 employees · 9 new
Company Posts
Saint-Gobain Sekurit 2
BAE Systems Australia 1
Universal Scientific Industrial Co., Ltd. 1
HII Unmanned Systems 1
Modern Technology Solutions, Inc. (MTSI) 1
Enterprise over 5,000 employees · 8 new
Company Posts
UL Solutions 2
Logitech 2
NVIDIA 1
Amentum 1
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.

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 Posts
Electrical Engineer
26% 135
Telecommunications Engineer
14% 73
Hardware Engineer
7.2% 38
Systems Engineer
5.1% 27
Chip Designer
2.7% 14
Integration Engineer
2.1% 11
Show the data
RoleShareOct 2025 to Aug 2026Mar to May 2026Jun to Aug 2026
Electrical Engineer26%1354438
Telecommunications Engineer14%732319
Hardware Engineer7.2%38313
Systems Engineer5.1%2746
Chip Designer2.7%1453
Integration Engineer2.1%1141
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.