He left this position in 1965 to become assisting director.

He was later promoted to assisting director.

In 1946 he was promoted to assisting director in the Hafslund corporation.

He rose in the hierarchy, via board secretary from 1948, assisting director from 1954 and vice president from 1957 to 1961.

After the war, Widerøe was employed as assisting director in the Norwegian Aviation Authority from 1945 to 1946.

In 1959 he became assisting director; but he left the Council of Europe in 1966.

He was promoted to assisting director in 1932 and chief executive officer in 1934.

He got into the world of cinema by assisting noted director Kamal.

From 1997 to 2000 he was assisting director of the institution.

In 1957 he was hired as assisting director in Forsikringsselskapet Norden, later working as chief executive from 1958 to 1971.