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Geiger Brothers began in 1909 as J.A. Geiger’s one-man plumbing business and remains an employee-owned company more than a century later. Today, its 400-plus craftspeople carry that small-business origin into complex construction and engineering work for commercial, industrial, and institutional customers across the region. The company is particularly experienced with mission-critical facilities, including nuclear projects.
Rooted in a 1961 Waterville, Ohio, company, Gelok International is part of Principle Business Enterprises, a family-led business now guided by third-generation CEO and President Andrew Stocking. Since the mid-1980s, Gelok has been known for custom-engineered absorbent materials that help manufacturers manage aqueous fluids in healthcare, personal care, packaging and industrial applications. Its plant operates under an Intertek-certified ISO 9001:2015 quality management system.
Known in Dayton for close-tolerance hand spinning, Gem City Metal Technologies is a metal-forming shop serving demanding aerospace, defense, and industrial customers. Its single-location operation also supports hydroforming and in-house tooling for projects that require carefully controlled shapes and responsive production.
Since 1978, Gem City Steel Supply has served the Southeast from Marietta as a steel supplier and fabricator for projects ranging from a one-inch piece of material to structural packages measured in thousands of tons. Its in-house structural department is an AISC-certified fabricator, while its ornamental team takes custom handrails, gates, and fencing from site measurements through fabrication and installation. The company also supplies cut-to-size material and handles delivery for contractors, manufacturers, builders, and the general public.
Known for its commercial focus, Gem City Tire provides tires, fleet service and commercial tire retreading from eight locations across the Midwest. The company also supports operators with light mechanical work and 24-hour emergency roadside assistance, while its ASE-certified technicians handle retreading designed to extend the working life of fleet tires. Gem City Tire identifies itself as a Top 50 retreader in the United States.
Gemini Group, Inc. is a family of manufacturing companies making engineered plastic products and metal tooling for OEMs and Tier 1 suppliers. Founded in 1996 as the group bringing together its engineered plastics and tooling businesses, it traces its heritage to manufacturing ventures begun in 1972 and is a second-generation, family-owned business based in Huron County, Michigan. The company reports more than 1,400 employees across 17 North American locations.
Gemini Industrial was founded more than a decade ago by people who brought decades of manufacturing experience to a new venture in eastern Ohio. From its 30,000-square-foot New Philadelphia facility, the company works with manufacturers across the United States to turn difficult production problems into custom machines or precision-fabricated parts.
Founded in 1981 by Larry and Sarah Barnette, Gen Power Controls grew from generator-control boards built in the family garage into a Fairborn, Ohio manufacturer and repair center for generator control systems and parts. The family-owned company produces its Gen-Power Controls voltage-regulator line, including direct replacements for Delco/Dayton Phoenix products, and ships equipment used in applications ranging from Gulf oil rigs to Caribbean yachts. Its history also includes supplying controls for Patriot missile ground systems during the Gulf War, while the Barnette family continues the business across three generations.
Woman-owned and operated, Gen3Printing is a third-generation family printing source serving Northeast Ohio for more than 40 years. The locally owned company is known for guiding customers through projects with a personal, family-style approach, from initial ideas to finished materials.
Founded in 1988 by the founders’ parents, GenCraft Designs is a second-generation family woodworking company rooted in Wayne County, Ohio. The business grew from a small retail furniture store into an in-house fabrication partner for designers, builders, and contractors working on commercial interiors and high-end homes across the United States. Its work is shaped by a multi-generational woodworking tradition and a process designed to carry a project’s intent from drawings through delivery.
Founded in 1943, General Aluminum Mfg. Company develops and produces engineered castings and components, with casting expertise spanning multiple processes. The company serves automotive and industrial OEMs and offers design, machining, and assembly capabilities for components including safety-critical parts.
Cincinnati-based General Wire Form manufactures wire forms, metal stampings, assemblies and chain products for OEM customers across North America. The company stands apart as a family-owned business that has chosen continued investment in engineering and production leadership rather than a private-equity sale, with management experience drawn from major wire-forming and stamping manufacturers. Its manufacturing program is certified to the NQA ISO 9001:2015 standard and supports customers from product development and tooling through PPAP and production.
Family-owned since George C. Gartner founded it in 1938, General Color Chemical Co. remains guided by the founder’s grandson and his customer-service roots. The Minerva manufacturer supplies colorants for plastics and develops custom solutions for processors using molding or extrusion. Its quality system has been ISO certified since 2003.
General Data Company is a Cincinnati manufacturer known for more than two decades of work supporting labeling, identification and healthcare workflows. Its six facilities produce custom labels and engineered coated materials for customers across diverse industries, while its certified service network helps keep printers and data-capture equipment operating nationwide.
Since 1957, General Die Casters has built its name around complex custom aluminum and zinc die castings for demanding industrial applications. The company operates three manufacturing facilities in two Northeast Ohio locations, with a 90,000-square-foot casting expansion opened in 2015 that brings casting and CNC machining together. With more than 25 casting machines and ISO 9001:2015 registration, General Die Casters handles challenging geometries, stringent porosity requirements and tight-tolerance machining from its own operations.
Part of General Dynamics, General Dynamics Ordnance and Tactical Systems is a global aerospace and defense company whose employees work across 27 locations in the United States and Canada. The company develops systems such as aircraft gun systems for the U.S. military and its allies, with capabilities extending from design through qualification and production.
General Electric Company is the corporate successor to an industrial enterprise founded by Thomas A. Edison in 1889, with a history spanning more than 130 years. The company states that its former aerospace, energy, and healthcare businesses now operate as three independent public companies: GE Aerospace, GE Vernova, and GE HealthCare.
Founded in 1950, General Extrusions International, LLC. manufactures custom aluminum extrusions and fabricated components. It has grown from a 10,000-square-foot operation to facilities totaling roughly 225,000 square feet, serving markets including building and construction, electronics, automotive, and medical equipment. The company highlights its history as an early North American aluminum extruder to achieve ISO certification.
Independent and owner-operated since 1942, General Metal Heat Treating has built its Cleveland reputation on careful craftsmanship and customer referrals. The company provides heat treating for manufacturers whose parts must meet demanding requirements, with quality systems certified to ISO 9001:2015/AS9100D and Nadcap AS7102.
Founded from a Minneapolis flour mill in 1866 and formally established as General Mills in 1928, General Mills is a global food manufacturer whose portfolio spans more than 100 brands sold in over 100 countries. It makes food for people and pets, with products found in approximately 90% of U.S. households, and operates food production facilities around the world.