Mary Margaret Rose MRAIC FCIP was born in Toronto and graduated with a B.Arch from the University of Toronto in 1965. She worked as an architect with several firms for five years, becoming professionally qualified as a member of Royal Architectural Institute of Canada.  She then returned to U of T to study planning and received her M.Sc. (Pl) degree in 1971. 
Mary was the first female planner / architect hired at the consulting firm Marshall Macklin Monaghan (later MMM Group) in Toronto.  She spent her entire planning career at MMM, starting as a senior planner, and later becoming MMM’s Director of Urban Design, Chief Architect and Vice-President of Planning. She personally prepared a large variety of planning studies, community plans, secondary plans and land development projects in Ontario, Nova Scotia, Alberta and BC.  Perhaps more importantly, she recruited, trained and mentored dozens of young planners, helping build MMM into Canada’s largest planning practice in the early 1980s.
Mary retired from MMM in 1993 and moved to Orillia, a community where she had prepared several planning studies. She was an advisor to the people of Rama and devoted herself to drawing and painting in her later years.
Mary was elected to the College of Fellows in 2000.