Overview

G&H Diversified Manufacturing is a contract manufacturer headquartered in Houston, Texas, founded in 1958. It employs roughly 200 to 500 people, with an estimated annual revenue of $10 to 50 million. The company is privately held and provides precision machining, metal fabrication, welding, assembly, and surface finishing. Its customers span automotive, medical, military and defense, industrial equipment, and aerospace sectors. Its Yellow Jacket Oil Tools division has recently been recruiting engineers and field technicians in Houston and the Permian Basin to support its oilfield tool line, including frac plugs.

At a glance

What G&H Diversified Manufacturing makes

G&H holds ISO 9001 certification and offers services including CNC precision machining, laser cutting, xylan coating, flame hardening, and welding, with oilfield products such as frac plugs and perforating guns.

Certifications

G&H Diversified Manufacturing is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:

• ISO 9001 — linkedin.com

Trade and customs footprint

The company has no customs or trade shipment data in the record, and its most recent public activity is a series of 2025 and 2026 hiring posts from Yellow Jacket Oil Tools seeking engineering and field service staff. US customs bill-of-lading records list 343 inbound shipments across 34 foreign suppliers, with top origins including Costa Rica · Honduras · China · South Korea.

Latest developments

• 2026-08-31 — We’re growing our engineering team at Yellow Jacket Oil Tools. We’re looking for a Design Engineer, Designer, and Drafter to join our Houston team and help develop the tools and technology used … | G&H Diversified Manufacturing (linkedin.com)

• 2026-01-21 — We’re growing—and looking for a Manufacturing & Process Engineer to help drive efficiency, quality, & continuous improvement across our operations. If you enjoy solving real manufacturing challenges & seeing your work make … | G&H Diversified Manufacturing (linkedin.com)

• 2026-01-14 — We are headed to the SPE Hydraulic Fracturing Technology Conference in The Woodlands, February 3-4. Stop by booth 809 to see how F1RSTString™ brings our perforating systems, setting tool and plugs together … | G&H Diversified Manufacturing (linkedin.com)

• 2025-12-23 — We’re growing our field team in the Permian - Join Yellow Jacket Oil Tools as a Frac Plug Service Technician and support the tools operators rely on, stage after stage. Hands-on. Field-driven. … | G&H Diversified Manufacturing (linkedin.com)

• 2025-11-20 — A simple box that represents a whole lot of engineering. M1NT™ frac plugs - field trusted, operator approved. Because performance isn't a claim, it's something you deliver. Stage after stage. Well after … | G&H Diversified Manufacturing (linkedin.com)

• 2025-08-18 — Thank you PNC!PNC Business Credit provides a full range of flexible solutions which can help transform your business. We would like to extend a warm welcome to our new customer, G&H Diversified … | John Kaiser (linkedin.com)

Company details

G&H's public profile describes over 50 U.S. patents and a primary focus on the energy sector, though the record does not name specific reported customers. G&H Diversified Manufacturing was founded in 1958, has an estimated 200-500 employees, and is headquartered in Houston, Texas. On the LightSource stability read it is rated "Established & active": 68 years in operation (founded 1958). Holds ISO 9001 certification(s) per public sources.

Frequently asked questions

What does G&H Diversified Manufacturing make?

G&H Diversified Manufacturing is a contract manufacturer headquartered in Houston, Texas, founded in 1958. It employs roughly 200 to 500 people, with an estimated annual revenue of $10 to 50 million. The company is privately held and provides precision machining, metal fabrication, welding, assembly, and surface finishing. Its customers span automotive, medical, military and defense, industrial equipment, and aerospace sectors. Its Yellow Jacket Oil Tools division has recently been recruiting engineers and field technicians in Houston and the Permian Basin to support its oilfield tool line, including frac plugs.

Where is G&H Diversified Manufacturing headquartered?

G&H Diversified Manufacturing is headquartered in Houston, Texas (11927 Tanner Rd, Houston, Texas, 77041-6703).

When was G&H Diversified Manufacturing founded?

G&H Diversified Manufacturing was founded in 1958.

How big is G&H Diversified Manufacturing?

G&H Diversified Manufacturing has an estimated 200-500 employees, with revenue in the $10-50M range (estimated).

What certifications does G&H Diversified Manufacturing hold?

G&H Diversified Manufacturing lists ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.

Does G&H Diversified Manufacturing import from overseas suppliers?

US customs bill-of-lading records show 343 inbound shipments for G&H Diversified Manufacturing, with top origins including Costa Rica · Honduras · China · South Korea.

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Last verified Nov 2026. Is this your company? Request a correction.