STM is an engineering company founded in 1984 in Florence, Italy that specializes in railway vehicle design, engineering, and maintenance. They provide services such as rolling stock design, tender documentation, maintenance manuals, shop equipment design, and accident investigations. Their areas of expertise include rolling stock design, project engineering, FEM calculations, maintenance plans, and technical admission procedures. They have worked with customers around the world, including in Brazil, Spain, Greece, Germany, Turkey, China, Romania, and Italy.