Verified Nov 2026
Electronics & Software
·
Pullman, Washington
·
Since 1982
Schweitzer Engineering Laboratories (SEL) is a manufacturer of protective relays, automation controllers, power quality meters, and communication processors for electric power systems. Headquartered in Pullman, Washington, the company was founded in 1982 and has an estimated 5,000 to 10,000 employees. It is employee-owned and serves the electric power, automotive, electronics, medical, renewable energy, and industrial equipment sectors. Recent activity includes a $25 million investment in a West Lafayette, Indiana expansion, reported in October 2026.
Schweitzer Engineering Laboratories (SEL) at a glance
Revenue
$1-5B
Est. band
Employees
5,000-10,000
Founded
1982
Headquarters
Pullman, Washington
Certifications
ISO 14001 · ISO 45001 · ISO 9001
Industries
Automotive
Electric Vehicles
Electronics
Medical
Renewable Energy
Industrial Equipment
STABILITY SIGNALS
Established & active
44 years in operation (founded 1982).
Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Overview
Schweitzer Engineering Laboratories (SEL) is a manufacturer of protective relays, automation controllers, power quality meters, and communication processors for electric power systems. Headquartered in Pullman, Washington, the company was founded in 1982 and has an estimated 5,000 to 10,000 employees. It is employee-owned and serves the electric power, automotive, electronics, medical, renewable energy, and industrial equipment sectors. Recent activity includes a $25 million investment in a West Lafayette, Indiana expansion, reported in October 2026.
At a glance
Attribute | Detail |
|---|---|
Founded | 1982 |
Headquarters | Pullman, Washington |
Employees | 5,000-10,000 |
Revenue | $1-5B (estimated) |
Primary capability | Electronics & Software |
Certifications | ISO 14001 · ISO 45001 · ISO 9001 |
What Schweitzer Engineering Laboratories (SEL) makes
SEL's product range includes protective relays, automation controllers, power quality meters, and communication processors, and it holds ISO 9001, ISO 14001, and ISO 45001 certifications.
Products and capabilities described on the company's own site include LED, Connector, Assembly (source: selinc.com).
Certifications
Schweitzer Engineering Laboratories (SEL) is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 14001 — selinc.com
ISO 45001 — selinc.com
ISO 9001 — selinc.com
Latest developments
2026-10-18 — SEL shares more details about Post Falls expansion (dnews.com)
2026-10-01 — Schweitzer Engineering Laboratories investing $25M in West Lafayette expansion – Inside INdiana Business (insideindianabusiness.com)
2026-09-17 — SEL Continues to Expand Manufacturing Capacity With New Post Falls, Idaho Facility (moscowchamber.com)
2026-08-26 — Newsroom | Schweitzer Engineering Laboratories (selinc.com)
2026-07-31 — SEL to Purchase Former Pullman Building Supply Property | Schweitzer Engineering Laboratories (selinc.com)
2025-10-28 — SEL announces three expansion projects (dnews.com)
Facilities
Schweitzer Engineering Laboratories (SEL) is headquartered in Pullman, Washington. Public sources also reference these locations:
Idaho — moscowchamber.com
Pullman, Washington — moscowchamber.com
Moscow, Idaho — selinc.com
Company details
SEL is 100% employee-owned and operates roughly 60 national and 50 international locations, according to its published company description. Schweitzer Engineering Laboratories (SEL) was founded in 1982, has an estimated 5,000-10,000 employees, and is headquartered in Pullman, Washington. On the LightSource stability read it is rated "Established & active": 44 years in operation (founded 1982). Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Frequently asked questions
What does Schweitzer Engineering Laboratories (SEL) make?
Schweitzer Engineering Laboratories (SEL) is a manufacturer of protective relays, automation controllers, power quality meters, and communication processors for electric power systems. Headquartered in Pullman, Washington, the company was founded in 1982 and has an estimated 5,000 to 10,000 employees. It is employee-owned and serves the electric power, automotive, electronics, medical, renewable energy, and industrial equipment sectors. Recent activity includes a $25 million investment in a West Lafayette, Indiana expansion, reported in October 2026.
Where is Schweitzer Engineering Laboratories (SEL) headquartered?
Schweitzer Engineering Laboratories (SEL) is headquartered in Pullman, Washington (2350 Northeast Hopkins Court, Pullman, Washington, 99163).
When was Schweitzer Engineering Laboratories (SEL) founded?
Schweitzer Engineering Laboratories (SEL) was founded in 1982.
How big is Schweitzer Engineering Laboratories (SEL)?
Schweitzer Engineering Laboratories (SEL) has an estimated 5,000-10,000 employees, with revenue in the $1-5B range (estimated).
What certifications does Schweitzer Engineering Laboratories (SEL) hold?
Schweitzer Engineering Laboratories (SEL) lists ISO 14001 · ISO 45001 · ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+1 509-332-1890
Certification
ISO 14001 · ISO 45001 · ISO 9001
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