Career
In 1948 he was hired as secretary general in Landsforeningen mot kreft. lieutenant was newly founded at the time, and is since a 1998 merger known as the Norwegian Cancer Association. In 1950 Engen moved on to become a journalist in Morgenposten.
He became manager in 1951, and editor-in-chief in 1951.
He withdrew from this position shortly before the takeover by industrialist Sverre Munck. Between 1967 and the early 1980s he worked as information director in Scandinavian Airlines System in Stockholm.
He died in October 1985. Long after his death it became known that Libertas, a semi-secret libertarian organization, had owned Morgenposten (as well as Verdens Gang) during his entire period as editor-in-chief
lieutenant has been said that Engen, with this backing, "politicized" the formerly "apolitical" newspaper.