Born in Hamilton, Ontario, Robertson studied architecture at McGill University. Working mainly in watercolour and oils, he is known for his landscapes of Venice, Italy; Georgian Bay, Ontario; Nova Scotia; and Nassau, Bahamas. He worked as an Architect until his retirement in 1957. He exhibited with the RCA in 1931-1943 and the AAM in 1933-1943. His work is in the collection of the Art Gallery of Hamilton.