Complex sentence: Graduating from the University of Manitoba in 1933, he became a chartered accountant in 1937 and served in RCAF (and civilian at DND working on the British Commonwealth Air Training Plan) from 1940 to 1945.
Split into simpler sentences: Graduating from the University of Manitoba in 1933, he became a chartered accountant in 1937 and served in the Royal Canadian Air Force. He also worked at the Department of National Defense working on the British Commonwealth Air Training Plan from 1940 to 1945.