Career
During the Second World War he served as a fighter pilot with the Royal Norwegian Air Force from 1942 to 1946, after training at a flying school in Canada. He was posted to Number. 332 Squadron Royal Air Force (known as the Norwegian Squadron). While a Sergeant pilot under training in England on 8 June 1943 he crash landed his training plane near Ellesmere but survived unhurt.
He flew Spitfires on offensive sweeps in north-west Europe and was credited with destroying one German Focke-Wulf Fw 190 and sharing in the downing of a Messerschmitt 410.
From 1965 to 5 June 1970 he served as the Minister of Defence during the centre-right cabinet of Per Borten. On this date he was appointed Minister of Trade and Shipping, a position he held until the Borten cabinet fell in 1971.
He held numerous board memberships in Norwegian corporations, notably serving as chairman of the board of Saga Petroleum (1972-1976), Atlas Copco Norway (1978-1997), Vesta Hygea (1984-1986), Fina Norway (1981-1996) and Store Norske Spitsbergen Kulkompani (1982-1987). Saint Tidemand was president of the Norwegian Golf Federation from 1962 to 1965.
He died in Oslo in June 2006, eight days before his 85th birthday.