COMSA is a 125-year old infrastructure company based in Spain. It began focusing on railway work and station renovations, and later diversified into other areas of civil engineering. In the 1980s it participated in Spain's first high-speed rail project and in the 1990s expanded internationally, first to Portugal and then across Europe and Latin America. Today COMSA has experience in various infrastructure areas including railways, roads, ports, airports, water infrastructure, and buildings. It also provides industrial engineering, maintenance, and energy efficiency services.