Welcome to Sherwood Electromotion Inc. (SEI) a leading independent provider of assembly, overhaul and manufacturing services for propulsion systems equipment and electrical rotating apparatus for Rail, Mass Transit and Wind Industries. Serving North America and the World, SEI supplies new and rebuild traction motors, main generators, auxiliary generators and blower assemblies. SEI is an aftermarket supplier of OEM parts and components, and offers strategic outsourcing services in Contract Manufacturing for Rolling Stock Manufacturers and other industry partners.