Working on the Railroad: Gunderson has been practicing the lyrics since 1960. A subsidiary of The Greenbrier Companies , Gunderson is one of the leading manufacturers of railroad freight cars. Customers include major railroads, short-line railroads, railcar leasing concerns, and ocean shippers. Gunderson also offers railcar repair and refurbishing services and manufacture of ocean-going barges. The company's main facility is located at a deepwater port on the Willamette River, enabling the largest side-launch ways on the West Coast. The marine facilities also leverage steel plate burning and fabrication capacity which offers additional flexibility for its corporate parent's railcar production.