John Willis Ambrose Ph.D. (1904 – 1974) was the first President of the Geological Association of Canada in 1947.
Ambrose spent his career exploring geology in Canada.
Between 1945 and 1948, he lived in Toronto, but was a Special Lecturer at Queen's University in Kingston, Ontario.
In 1948, he moved to Kingston and joined Queen's full-time.
The Geological Association of Canada honours Ambrose annually by awarding the Ambrose Medal to an individual for sustained dedicated service to the Canadian earth science community.