Técnicas Reunidas, S.A. is a Spanish multinational general contractor specializing in engineering, procurement, and construction services for industrial plants, particularly in the oil and gas sector. Founded in 1959 through a partnership between Spanish businessmen and The Lummus Company, it has evolved into a global leader, designing and building over 1,000 facilities worldwide, with international projects comprising 70% of its turnover, primarily in the Middle East, Latin America, China, and North Africa. The company operates across key divisions including oil and gas, power generation, petrochemicals, infrastructures, low carbon technologies, and renewables, while also serving sectors like fertilizers, mining, metallurgy, and environmental engineering. Headquartered in Madrid, Técnicas Reunidas, S.A. maintains a dedicated research and development center focused on process innovation, hydrometallurgy, and scaling technologies from lab to industrial levels. As a prominent player in energy transition initiatives, it delivers turnkey solutions that support sustainable industrial development globally. Employing over 12,000 people, the firm continues to expand its footprint in engineering and construction markets.