He was employee Mozarteum Orchestra in Salzburg for a period (1956), and over the years also a prominent chamber musician, often with pianists Ruth Lagesen or Kirsti Hjort.

His follower as a solo flautist in Norwegian Radio Orchestra counts names like Hans Schøyen, Per Øien, John Tonsjø and Tom Ottar Andreassen.

Likewise Finn Mortensens Sonata for flute, a composition Andersen himself had ordered and premiered (Universitetets Aula, 1954).

The Swedish composer Hilding Rosenberg dedicated Sonata for solo fløyte to Andersen, premiered in Sweden (April 1960).

He also recorded a tune with the jazz musician Willy Andresen, in aquartet with Per Nyhaug and Håkon Nilsen (1961).