From 1936 to 1947 he chaired the Norwegian Historical Association.
From 1966 to 1972 he chaired the Norwegian Historical Association.
He also chaired the Norwegian Association of Judges from 1989 to 1995.
From 1927 to 1932 he chaired the Norwegian Historical Association.
From 1879 to 1899 he chaired the Norwegian Historical Association.
The annual competitions by the Norwegian Association of Photographers in 2008 2009, and 2011.
From 2002 to 2004 he chaired the Norwegian Historical Association.
From 1964 to 1968 he chaired the Norwegian Association of Clergy.
He was also a board member of the Norwegian Shipowners' Association from 1915 to 1924.
He was the director of the Norwegian Shipowners' Association from 1973 to 1978.