About Us: State Steel Supply Company is a leading metal wholesaler headquartered in Sioux City, IA, offering a broad range of steel, aluminum, and stainless steel products along with value-added services to clients across the Midwest with additional locations in Omaha, Grand Island, Des Moines, Sioux Falls, and Spencer. You'll land new accounts, build lasting customer relationships, and develop proposals that win on service, backed by our management team and inside support staff.