Ensor returned to Canada in 1947 where he established the Ensor Industrial Design Association and became a member of the Royal Canadian Academy of Art. In 1967, His painting, "Summer Stores", was selected as the design for a 50 Cent Centennial Canada Post postage stamp. In the 1970s, he produced a series of watercolour paintings and coloured pencil sketches of the Royal Military College of Canada in Kingston, Ontario. These paintings, which are currently in the Beaverbrook Collection of War Art at the Canadian War Museum include scenes of officer cadets in various activities: