Eastern Sierra Transport, 1340 W Graaf Ave, Ridgecrest, CA 93555, US

Headquartered in Albertville, Ala., Progress Rail Services is one of the leading suppliers of remanufactured locomotive and railcar products throughout the United States. It provides trackwork, equipment maintenance, signal devices, reconditioned freight car parts, and railcar and locomotive repair services to the rail industry. Progress Rail Services operates a locomotive and railcar division that specializes in repairing and rebuilding components, such as wheels, axles and traction motors for rail transit vehicles. It operates facilities in more than 35 U.S. states, as well as in Canada and Mexico. Progress Rail Services is a wholly owned subsidiary of Caterpillar, which is a manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines.