Obrascón Huarte Lain SA engages in civil engineering and building construction works for public and private customers. It operates through the following segments: Construction, Industrial, Services, and Other. The Construction segment is involved in the civil engineering and building construction works for public and private customers in Spain and abroad. The Industrial segment focuses on engineering, particularly complete industrial plants and systems, including the design, construction, maintenance and operation, and any other activity related to oil and gas, renewable energy, mining and cement, solids engineering, and fire-fighting systems. The Services segment consists of cleaning, maintenance and urban, and waste management services in buildings, homes, offices, urban green areas and road networks, and social and health services. The Other segment refers to minor businesses, corporate, and consolidation adjustments. The company was founded on May 15, 1911 and is headquartered in Madrid, Spain.