Background
He was a son of landowner Jørgen Arthur Mathiesen, and as such a grandson of Haaken L. Mathiesen and great-grandson of Haaken C. Mathiesen and Anders Ferrand Kiær.
He was a son of landowner Jørgen Arthur Mathiesen, and as such a grandson of Haaken L. Mathiesen and great-grandson of Haaken C. Mathiesen and Anders Ferrand Kiær.
In 1946 he became a co-owner in the family company Mathiesen Eidsvold Værk. He was appointed as manager of the company in 1953.
He was also an honorary member of Foreningen Norden and the sports club Eidsvold Værks Saskatchewan.