National Crane Inspection, 4210 Plainville Rd, Cincinnati, OH 45227, US

Founded in 1901, Enerfab is one of the leading, privately held providers of maintenance services, capital equipment components and technology solutions for the energy industry and other industrial markets. The company manufactures and installs pollution-control equipment. It provides maintenance services for coal-fired utilities throughout the United States. Enerfab also produces columns and pressure vessels for the chemical and downstream petrochemical industries. The company offers field-erected alloy vessels and fermentation equipment with mechanical systems for the food and beverage industry. It employs more than 4,000 professionals and operates over eight facilities throughout the U.S. Enerfab maintains a pipe fabrication shop in Ohio.