Verified Nov 2026
CNC Machining
·
El Monte, California
·
Since 1945
The Gill Corporation is a manufacturer of composite materials and CNC-machined parts, headquartered in El Monte, California, and founded in 1945. The company has an estimated 1,000 to 5,000 employees and an estimated revenue band of $100 to $250 million, and it is privately held. It serves the automotive, electric-vehicle, aerospace, military-defense, and industrial equipment sectors. Its products include composite panels, honeycomb core materials, and machined components, and the company reports Boeing among its customers.
The Gill Corporation at a glance
Revenue
$100-250M
Est. band
Employees
1,000-5,000
Founded
1945
Headquarters
El Monte, California
Certifications
AS9100 · ISO 14001 · ISO 9001 · Nadcap
Industries
Automotive
Electric Vehicles
Military & Defense
Industrial Equipment
Aerospace
STABILITY SIGNALS
Established & active
81 years in operation (founded 1945).
Holds AS9100, ISO 14001, ISO 9001, Nadcap certification(s) per public sources.
Overview
The Gill Corporation is a manufacturer of composite materials and CNC-machined parts, headquartered in El Monte, California, and founded in 1945. The company has an estimated 1,000 to 5,000 employees and an estimated revenue band of $100 to $250 million, and it is privately held. It serves the automotive, electric-vehicle, aerospace, military-defense, and industrial equipment sectors. Its products include composite panels, honeycomb core materials, and machined components, and the company reports Boeing among its customers.
At a glance
Attribute | Detail |
|---|---|
Founded | 1945 |
Headquarters | El Monte, California |
Employees | 1,000-5,000 |
Revenue | $100-250M (estimated) |
Primary capability | CNC Machining |
Certifications | AS9100 · ISO 14001 · ISO 9001 · Nadcap |
What The Gill Corporation makes
The company holds AS9100, ISO 9001, ISO 14001, and Nadcap accreditations, and its product range includes composite, glass, aluminum, and plastic components alongside CNC machining and assembly services.
Products and capabilities described on the company's own site include LED, Composite, Glass, Machining, Assembly, Sub-Assembly, Plastic, Aluminum, Interior, CNC Machining (source: thegillcorp.com).
Certifications
The Gill Corporation is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
AS9100 — thegillcorp.com
ISO 14001 — thegillcorp.com
ISO 9001 — thegillcorp.com
Nadcap — thegillcorp.com
Known customers
The counterparties below come from public sources that state the relationship directly. A shared counterparty does not by itself establish a current buying relationship unless the source says so:
Boeing — reported by thegillcorp.com
Latest developments
2026-10-15 — The Gill Corporation and USC Partnership Earns Multiple Awards at SAMPE Conference - The Gill Corporation (thegillcorp.com)
2026-06-24 — Gold Better Stands Award (thegillcorp.com)
2026-06-23 — Press Archives - The Gill Corporation (thegillcorp.com)
2026-05-15 — Retirement of Chief Commercial Officer Chris Larsen (thegillcorp.com)
2025-10-29 — Nadcap accreditation for composites (thegillcorp.com)
2025-10-19 — Anglet : Gill Corporation France diversifie son activité sur le nucléaire et va embaucher - ICI (ici.fr)
Facilities
The Gill Corporation is headquartered in El Monte, California. Public sources also reference these locations:
Maryland — thegillcorp.com
Company details
The company reports Boeing as a customer and operates a facility in Maryland, according to its own website. The Gill Corporation was founded in 1945, has an estimated 1,000-5,000 employees, and is headquartered in El Monte, California. On the LightSource stability read it is rated "Established & active": 81 years in operation (founded 1945). Holds AS9100, ISO 14001, ISO 9001, Nadcap certification(s) per public sources.
Frequently asked questions
What does The Gill Corporation make?
The Gill Corporation is a manufacturer of composite materials and CNC-machined parts, headquartered in El Monte, California, and founded in 1945. The company has an estimated 1,000 to 5,000 employees and an estimated revenue band of $100 to $250 million, and it is privately held. It serves the automotive, electric-vehicle, aerospace, military-defense, and industrial equipment sectors. Its products include composite panels, honeycomb core materials, and machined components, and the company reports Boeing among its customers.
Where is The Gill Corporation headquartered?
The Gill Corporation is headquartered in El Monte, California (4056 Easy Street, El Monte, California, 91731).
When was The Gill Corporation founded?
The Gill Corporation was founded in 1945.
How big is The Gill Corporation?
The Gill Corporation has an estimated 1,000-5,000 employees, with revenue in the $100-250M range (estimated).
What certifications does The Gill Corporation hold?
The Gill Corporation lists AS9100 · ISO 14001 · ISO 9001 · Nadcap on its website. Confirm the certified scope for the specific plant producing your part.
Who are The Gill Corporation's customers?
Public sources directly reference Boeing as a counterparty of The Gill Corporation. Confirm current programs with the company, as reported relationships may change.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+1 626-443-4022
Certification
AS9100 · ISO 14001 · ISO 9001 · Nadcap
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