Reinertsen is a civil engineering, construction, and petroleum industry supply company based in Trondheim, Norway. It was established in 1946 and remains family-owned. Its CEO is Erik Reinertsen and chairman is Torkil R. Reinertsen. In 2011, Reinertsen had a revenue of €400 million and 2,100 employees. It has offices in Trondeim, Orkanger, Oslo, Bergen, Gothenburg, Stockholm, Murmansk (Russia) and Szczecin (Poland).