Marguerite was born in Yarmouth and studied at the Nova Scotia College of Art. She taught painting at Acadia University and married Leroy Zwicker. Marguerite ran Zwicker’s Gallery with her husband. Until the establishment of the Art Gallery of Nova Scotia and the university art galleries in the 1970’s, Zwicker’s Gallery was the only venue in Halifax where art was regularly shown to the public. She also conducted painting and cultural tours of Spain and Portugal. Marguerite was strongly influenced by the great American artist-teacher Hans Hoffman under whom she studied. She was particularly well-known for her watercolour landscape.