Company History

Koester Corporation has a rich history of growth and diversification that has been driven by a commitment to quality and innovation. Founded in 1970 in Defiance, Ohio, Koester Corp began its journey by providing control panels for the foundry industry. As the company grew, we expanded our expertise and services to meet the evolving needs of our clients.

By 1990, Koester Corp opened a manufacturing division focused on mechanical and structural fabrication. This expansion allowed us to offer a broader range of services, enhancing our ability to deliver comprehensive solutions to our customers. In 2009, we relocated to Napoleon, Ohio, combining our panel shop and manufacturing division into a state-of-the-art 42,400-square-foot facility. This move also marked the establishment of our electrical engineering division in downtown Napoleon, providing our clients with a full suite of in-house services.

In 2012, we continued to expand our capabilities by adding a 20,000-square-foot addition to our manufacturing facility. Today, Koester Corporation operates as a diversified manufacturing enterprise with multiple divisions specializing in electrical engineering, industrial control manufacturing, machining, fabrication, and machine building. Our ability to integrate these services allows us to offer tailored solutions, whether clients require a complete package or individual services.

Current Company Information

Location: Napoleon, Ohio

Facility Size: 62,400 square feet (including a 20,000-square-foot addition in 2012)

Employees: Currently, we employ 50 skilled professionals

Recent Investments: Over $725,000 invested in our manufacturing facility since 2021

Our history at Koester Corp. is a testament to our dedication to quality, innovation, and customer satisfaction. We continue to build on our legacy by investing in our people, facilities, and technology to meet our clients’ future needs.