Verified Nov 2026
Powertrain & Drivetrain
·
Oklahoma City, Oklahoma
·
Since 1928
United Engines is a manufacturer and service provider headquartered in Oklahoma City, Oklahoma, that was founded in 1928. It employs an estimated 200 to 500 people with estimated annual revenue of $10 to $50 million, and is privately held. The company makes and services transmissions, generators, and diesel engines, and serves the automotive, electric vehicle, and industrial equipment sectors. It also reports a 2026 post on LinkedIn about grid parallel power, reflecting its work supporting power demand.
United Engines at a glance
Revenue
$10-50M
Est. band
Employees
200-500
Founded
1928
Headquarters
Oklahoma City, Oklahoma
Certifications
ISO 9001
Import activity
87
Industries
Automotive
Electric Vehicles
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
87
Named foreign suppliers
7
Top origins
United Kingdom · Germany · Mexico
Shared foreign counterparties do not establish that these companies buy from United Engines.
What this tells a buyer
The company opened a Little Rock facility, which it describes as built to support next-generation power and diagnostic work, with the announcement dated April 12, 2026.
The company holds ISO 9001 certification and lists transmissions, pumps, and assemblies among its products, with generators and diesel engines in its service offering.
United Engines is privately held and operates locations in Oklahoma City, Tulsa, Little Rock, and Shreveport, and it reports partnerships with Rolls-Royce Power Systems.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
98 years in operation (founded 1928).
Holds ISO 9001 certification(s) per public sources.
Overview
United Engines is a manufacturer and service provider headquartered in Oklahoma City, Oklahoma, that was founded in 1928. It employs an estimated 200 to 500 people with estimated annual revenue of $10 to $50 million, and is privately held. The company makes and services transmissions, generators, and diesel engines, and serves the automotive, electric vehicle, and industrial equipment sectors. It also reports a 2026 post on LinkedIn about grid parallel power, reflecting its work supporting power demand.
At a glance
Attribute | Detail |
|---|---|
Founded | 1928 |
Headquarters | Oklahoma City, Oklahoma |
Employees | 200-500 |
Revenue | $10-50M (estimated) |
Primary capability | Powertrain & Drivetrain |
Certifications | ISO 9001 |
What United Engines makes
The company holds ISO 9001 certification and lists transmissions, pumps, and assemblies among its products, with generators and diesel engines in its service offering.
Products and capabilities described on the company's own site include Transmission, Pump, Assembly (source: unitedengines.com).
Certifications
United Engines is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 9001 — processregister.com
Trade and customs footprint
The company opened a Little Rock facility, which it describes as built to support next-generation power and diagnostic work, with the announcement dated April 12, 2026. US customs bill-of-lading records list 87 inbound shipments across 7 foreign suppliers, with top origins including United Kingdom · Germany · Mexico.
Latest developments
2026-08-30 — We’ve powered up our fleet. ⚡ | United Engines (linkedin.com)
2026-06-10 — Incredible news from our partners at Rolls-Royce Power Systems! | United Engines (linkedin.com)
2026-05-11 — It was an honor to be recognized at the Hol-Mac Dealer Awards. Receiving the "First Blood" award is a testament to the hard work our team put in during our first year … | United Engines (linkedin.com)
2026-04-12 — Our Little Rock facility was engineered to handle the next generation of power. From smarter workflows to modern diagnostic technology, every inch of this space was built to support the increasingly complex … | United Engines (linkedin.com)
2026-04-08 — As AI and electrification increase the demand for grid parallel power, we're proud to be part of the solution. | United Engines (linkedin.com)
2025-06-25 — Hit play and peak behind the curtain at our new United Engines facility in Little Rock! | United Engines (linkedin.com)
Company details
United Engines is privately held and operates locations in Oklahoma City, Tulsa, Little Rock, and Shreveport, and it reports partnerships with Rolls-Royce Power Systems. United Engines was founded in 1928, has an estimated 200-500 employees, and is headquartered in Oklahoma City, Oklahoma. On the LightSource stability read it is rated "Established & active": 98 years in operation (founded 1928). Holds ISO 9001 certification(s) per public sources.
Frequently asked questions
What does United Engines make?
United Engines is a manufacturer and service provider headquartered in Oklahoma City, Oklahoma, that was founded in 1928. It employs an estimated 200 to 500 people with estimated annual revenue of $10 to $50 million, and is privately held. The company makes and services transmissions, generators, and diesel engines, and serves the automotive, electric vehicle, and industrial equipment sectors. It also reports a 2026 post on LinkedIn about grid parallel power, reflecting its work supporting power demand.
Where is United Engines headquartered?
United Engines is headquartered in Oklahoma City, Oklahoma (5555 W Reno Ave, Oklahoma City, Oklahoma, 73127-6340).
When was United Engines founded?
United Engines was founded in 1928.
How big is United Engines?
United Engines has an estimated 200-500 employees, with revenue in the $10-50M range (estimated).
What certifications does United Engines hold?
United Engines lists ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does United Engines import from overseas suppliers?
US customs bill-of-lading records show 87 inbound shipments for United Engines, with top origins including United Kingdom · Germany · Mexico.
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Last verified Nov 2026. Is this your company? Request a correction.
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