Columbia Gas of Ohio Employee Directory
UtilitiesOhio, United States201-500 Employees
Columbia Gas of Ohio supplies natural gas to roughly 1.5 million customers across Ohio. It is the largest natural gas utility in the state. The company operates as a subsidiary of NiSource, a major fully regulated utility group serving about 4 million customers across six states through its Columbia Gas and NIPSCO brands. Headquartered in Columbus, Ohio, the business maintains a mid-sized workforce. In October 2025, Columbia Gas of Ohio partnered with Miller Pipeline to upgrade natural gas infrastructure along Dunford Road in Westlake, Ohio.