We found 2,710 companies that use SLC. 354 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; 251 job posts named it from October 2025 to August 2026. It comes up most in Skilled Trades job posts.
Among the companies with the most job posts naming SLC are Rich Products Corporation (96), Rockwell Automation (78) and Thermo Fisher Scientific (47). Thermo Fisher Scientific is the newest of the five companies in the table, with its first job post naming it in July 2024.
CompanyPostsRecent job post
Rich Products CorporationAccommodation and Food Services · first seen Sep 202296
"Uses assembly drawings, P&ID’s and manuals to tune equipment for operation, uses electrical (VFD’s, SCR’s, motor starters) and logic (PLC, SLC) principles to solve equipment problems."Maintenance Mechanic, Oct 23, 2026
Rockwell AutomationManufacturing · first seen May 202378
"You will provide technical expertise for Rockwell Automation's Logix family of products including ControlLogix, CompactLogix, MicroLogix, SLC & PLC5 Processors, I/O, and their communications."Engineer, Remote Support, Jan 17, 2026
Thermo Fisher ScientificScientific and Technical Services · first seen Jul 202447
"Minimum knowledge and ability to learn PLC formats with heavy emphasis on Allen-Bradley PLC/HMI hardware and software: SLC, PLC, ControlLogix, PanelView"Sr. Mfg. Equipment Maintenance Technician - Rotating Nights, Oct 22, 2026
CommScopeInformation · first seen Sep 202244
"Allen Bradley ControlLogix, Legacy PLC Products, SLC and PLC5;"Technician II, Maintenance, Oct 21, 2026
THUNDERBIRD LLCManufacturing · first seen Apr 202342
"Basic knowledge of relay logic, AC/DC motor drives, PLC & SLC and motor control circuits."maintenance mechanic - l4, Nov 6, 2026
Hiring for SLC barely changed, at 0.13 in every 10,000 job posts from June to August 2026 against 0.14 from March to May. From October to December 2025 it was 0.11.
Show the data
Month
Job posts naming SLC
All job posts
Per 10,000
Oct 2025
17
1,413,673
0.12
Nov 2025
15
1,822,119
0.08
Dec 2025
16
1,236,103
0.13
Jan 2026
32
1,828,002
0.18
Feb 2026
24
1,856,647
0.13
Mar 2026
24
1,850,711
0.13
Apr 2026
25
1,728,886
0.14
May 2026
26
1,821,509
0.14
Jun 2026
35
1,909,496
0.18
Jul 2026
19
1,815,180
0.10
Aug 2026
18
1,835,698
0.10
How many companies named SLC in a job post for the first time in recent months?
In the three months to August 2026, 14 companies posted about SLC for the first time. From March to May, 12 did. Over the 11 months from October 2025, 48 companies posted their first job naming it.
March to May 202612
June to August 202614
October 2025 to August 202648
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 SLC?
87% of the companies here are known from employees' profiles alone, and 13% name SLC in their own job posts. 60 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name SLC
35413%
Employees' profiles list SLC
2,35687%
2,710 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use SLC?
38% of SLC users are companies with 50 to 999 employees, the largest size group. 671 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
21%17%
Over 5,000
25%23%
Where are SLC companies based?
Beyond the United States (49%), SLC is unusually common in Brazil, at 10% of its companies. Its companies are based in 77 countries and territories.
ShareTypical
United States
49%43%
Brazil
10%2.8%
Canada
5.6%3.6%
India
5.4%6.9%
United Kingdom
5.3%6.4%
Germany
2.7%4.4%
Companies in 77 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
1,283
49%
43%
Brazil
269
10%
2.8%
Canada
145
5.6%
3.6%
India
139
5.4%
6.9%
United Kingdom
138
5.3%
6.4%
Germany
69
2.7%
4.4%
Which teams work with SLC?
SLC work is spread across teams. Maintenance leads, at 16 companies. Next come engineering teams (11 companies) and operations & maintenance teams (4).
TeamCompanies
Maintenance
16
Engineering
11
Operations & maintenance
4
Automation
3
Facility operations directorate
3
Ground data systems service
3
What else do SLC companies use?
PLC 5, MicroLogix and CompactLogix show up far more often at SLC companies than at companies of the same size. Among the tools listed here, ControlLogix is the most widely used, at 44% of SLC companies.
Share of the 219 SLC companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming SLC in job posts recently?
16 companies with 50 or more employees started naming SLC in job posts between April and August 2026. 5 of them have more than 5,000 employees. Capgemini has the most job posts of the new enterprise companies, 3 from April to August.
Companies that named SLC 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 SLC most?
Skilled Trades and Control Engineer roles account for 53% of the job posts that name SLC. The top four roles cover 63% of these job posts.
RoleSharePosts
Skilled Trades
33%84
Control Engineer
20%49
Automation Engineer
5.2%13
Software Engineer
5.2%13
Electrician
3.2%8
Electrical Engineer
2.8%7
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Skilled Trades
33%
84
25
24
Control Engineer
20%
49
9
18
Automation Engineer
5.2%
13
5
2
Software Engineer
5.2%
13
9
2
Electrician
3.2%
8
3
1
Electrical Engineer
2.8%
7
3
1
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.
