Created in 1999 after the merger of Spanish firms Obrascón, Huarte and Construcciones Lain, Obrascón Huarte Lain S.A. (OHL) is a Madrid-based concessionaire group specializing in administrative and infrastructure concessions, as well as in engineering and construction, and is active in more than 30 countries, across five continents. In Latin America, the company has operations in Chile, Colombia, Guatemala, Honduras, México, Perú and Uruguay. OHL develops, builts and maintains concessiones related to transportation, parking, ports and airports, and engineers and constructs for both public and private clients, plants and other industrial systems. The company's predecesor, Sociedad General de Obras y Construcciones Obrascón, S.A., was incorporated in 1911. OHL is headquartered in Madrid, Spain.