Andersson began his career as an attaché at the
Ministry for Foreign Affairs in
Stockholm in 1943. He served in
Washington, D.C. from 1944 to 1948 and in
London from 1948 to 1950, before returning to the Foreign Ministry in Stockholm between 1950 and 1955. In 1953, he was promoted to first secretary. He went on to serve as consul in
Casablanca from 1955 to 1958 and in
Houston from 1958 to 1963, where he was appointed consul general in 1963. He was then appointed ambassador in
Wellington, New Zealand, from 1967 to 1969, followed by
Jakarta, Indonesia, and concurrently
Manila, Philippines, from 1969 to 1973. From 1973 to 1976, he held the position of consul general in
Chicago. He returned to the Foreign Ministry in Stockholm from 1976 to 1979. In November 1982, he was reassigned to the Foreign Ministry in Stockholm while retaining his ambassadorial position in Kinshasa and other accredited posts. Andersson also served as an expert delegate in trade negotiations during his career. ==Personal life==