Oshkosh Corporation, formerly Oshkosh Truck, is an American industrial company that designs and builds specialty trucks, military vehicles, truck bodies, airport fire apparatus and access equipment. The corporation also owns Pierce Manufacturing, a fire apparatus manufacturer in Appleton, Wisconsin. Based in Oshkosh, Wisconsin, the company employs approximately 16,000 people around the world. It is organized in four primary business groups: access equipment, defense, fire and emergency, and commercial.