Norsk Hydro
His first engineering job was at Dow Chemical Co. in Texas from 1967 to 1970. After a year at Dow Chemical Co. in Germany, he was hired in Norsk Hydro in 1971. He was an engineer for Norsk Hydro at Rafnes from 1975, then chief engineer for Norsk Hydro in Porsgrunn from 1976 to 1981.