He worked as actor and stage producer at Rogaland Teater from 1957 to 1960, and served as theatre director from 1960 to 1970. He founded the children"s theatre (Norwegian: Barneteatret) at Rogaland Teater. From 1970 he translated and staged a large number of Samuel Beckett"s plays for Det Norske Teatret.
Endreson issued the poetry collection Kadens in 1946.