After completing his machinist's exam, he quit his career as a sailor at the end of the 1960s to start as a stagehand and actor at Scene 7 and the National Traveling Theater.
From 1972 to 1982 he produced over thirty documentaries for NRK. In feature films, he has worked as a camera operator, recording manager, production manager, producer, screenwriter, and director. From 1982 to 1985, Einarson was associated with Christiania Bank's film company Movieteam, and he produced films and videos for the business world.
^Lachmann, Michael; Lange-Fuchs, Hauke (1993). Film in Skandinavien, 1945–1993: Dänemark, Finnland, Island, Norwegen, Schweden. Berlin: Henschel. p. 145.