Obrascón Huarte Lain, S.A. engages in the construction and concessions businesses in the United States, Canada, Mexico, Chile, Peru, Colombia, Spain, Central and Eastern Europe, and internationally. It operates through Construction, Industrial, and Services segments. The company provides civil engineering and building construction services for public and private-sector customers; and designs, engineers, constructs, maintains, and operates industrial plants and systems, including oil and gas, renewable energy, mining and cement, solids engineering, and fire-fighting systems. It also offers cleaning, maintenance and urban, and waste management services for buildings, homes, offices, urban green areas, and road networks; social and health services; building renovation and consulting; technical advisory; and management consultancy services. In addition, the company engages in the installation and maintenance of security and fire protection systems; water treatment and distribution; development of a fossil fuel power plants; industrial engineering for a refinery; development and operation of hotels and leisure centres; finance, studies, and management; construction and development of real estate projects; and concession and operation of ports and marinas. The company was formerly known as Sociedad General de Obras y Construcciones Obrascón, S.A. Obrascón Huarte Lain, S.A. was incorporated in 1911 and is based in Madrid, Spain.