Founded in 2019, Seneca Manufacturing is a Tiffin, Ohio startup built around the more than 80-year engineering and manufacturing legacy of its partner facility, OCECO. The company serves oil and gas customers, engineering firms, government and OEM sectors with machining and fabrication work. Its ISO-certified quality management system and 32,000-square-foot facility support both current production and future expansion.
ISO 9001 Quality Management System Certification
Southeastern Machining and Field Service, IncSoutheastern Machining and Field Service turns customer concepts into machined parts, fabricated equipment, and on-site industrial repairs from its Lancaster, Ohio facility. Its more than 22,000 square feet support work ranging from prototypes and production machining to machine rebuilds, while an in-house engineering team handles reverse engineering and design support. Southeastern Machining is ISO 9001:2015 certified and provides inspection throughout the machining process as well as at final review.LANCASTER, OH
Tendon Manufacturing, IncFounded in 1988 by industry veterans Michael Gordon Sr. and Greg Tench, Tendon Manufacturing is a Cleveland-area metal fabrication company producing custom, precision-engineered parts and assemblies in the USA. The company has grown from six employees into a workforce of more than 105 across three Ohio facilities totaling 150,000 square feet, serving OEMs nationwide. Its ISO 9001:2015 with Design certification supports the quality system behind its made-in-America production.BEDFORD, OH
Arnold MachineArnold Machine began in 1994 as a two-person shop in Tiffin, Ohio, and has grown into a 75,000-square-foot manufacturer known for building automated equipment around customers’ production needs. Its engineers and machine tradespeople work primarily with OEMs and Tier 1 manufacturers, carrying projects from early testing through installation and field support.TIFFIN, OH
Custom Machine, IncFounded by Harold A. Biddle in 1979, Custom Machine, Inc. is a Tiffin-area job shop that machines and fabricates customer parts. Its 19,000-square-foot facility employs more than 20 workers and combines machining and fabrication operations; the business has been owned by David Hammer since 2004.TIFFIN, OH