[2] In 1944, he graduated with honors from the Ontario College of Art and joined the National Film Board (NFB) in the same year.

He directed: Tours en l'air (1974), a film about work of dancers Anna-Marie and David Holmes; Boo Hoo (1975), which concerned a cemetery and crematorium in Saint John, New Brunswick;[4] and Animated Motion (parts 1–5, 1976–8) and McLaren on McLaren (1983), which documented the work and philosophy of his friend and colleague.

[3][8] On June 20, 2007 Concordia University awarded Munro an honorary doctorate in recognition of his legacy for generations of filmmakers.

As well, he was involved in making several award-winning film's and has been an inspiring role model and dedicated mentor to several generations of young filmmakers.

A frequent collaborator with Norman McLaren, Munro brought a wicked wit and sublime grace to the art.