Transportation Products Sales Company (TPSC) is a professional sales management organization that represents top-quality products and specialized services utilized by railroads, rail transit companies and rail-industry contractors across North America. Founded in 1986, the privately-held company today has offices in 11 locations, including their headquarters near St. Louis, Missouri. TPSC associates are highly experienced and committed to understanding the exacting requirements and needs of the railroad industry. Rail customers are responsive to their ability to provide solutions for locomotives, signaling, and telecommunications operations.