COMSA Corporación is the second-largest Spanish unlisted group in the infrastructures and engineering sector. Founded in 1891, the company delivers comprehensive infrastructure, engineering, environmental and technology services. \\One of the pillars of COMSA Corporación's progress is its business operations abroad. The company is present in more than 20 countries: Algeria, Andorra, Argentina, Australia, Brazil, Chile, Colombia, Croatia, Ecuador, France, Latvia, Lithuania, Mexico, Morocco, Paraguay, Peru, Poland, Portugal, Romania, Spain, Switzerland, Sweden, Turkey and Uruguay.\\The company was in the United States till 2013 where it executed relevant projects such as the railway modernization of the Green Light Rail Center of San Francisco.