Polimex-Mostostal SA engages in the provision of engineering and construction services. It operates through the following segments: Energy; Petroleum, Gas, and Chemistry; and Other Activity. The Energy segment offers services related to the construction of buildings in the energy industry, design, production, and sale of boilers energy services service in the field of a fixed and comprehensive service power plants, power plants, and industrial plants. The Petroleum, Gas, and Chemistry segment comprises installation of equipment process for chemical and petrochemical industry, fabrication and installation of steel structures, pipelines, tanks, technological storage and pipelines, fabrication, and installation of furnaces for industry refinery. The Other Activity refers to industrial and infrastructure, hardware and transport, rental, lease, laboratory tests, service equipment, and other related services. The company was founded in 1945 and is headquartered in Warsaw, Poland.