Marcus Létourneau is the President of M. R Letourneau and Associates Inc., an Ontario-based heritage consultancy. He is also an Adjunct Assistant Professor and Contributing Associate for the Heritage Resources Centre at the University of Waterloo. He co-teaches the facilities management course for historic house museums for the Ontario Museum Association, and teaches a course called“Heritage Planning for Practitioners" at Algonquin College.

Marcus currently serves as an advisor for the Friends of Springfield House Complex, on the Board of Directors for the Heritage Resources Centre at the University of Waterloo, and on the Township of Leeds and the Thousand Islands Municipal Heritage Committee. He is a professional member of the Canadian Institute of Planners (MCIP), a Registered Professional Planner (RPP) and a full Canadian Association of Heritage Professionals (CAHP) member.

Marcus brings over 20 years of experience to his practice, which is particularly focused on heritage legislation, process, and heritage planning. He has been involved in over 250 projects either as the project manager or as the senior heritage planner. He has been qualified as an expert heritage witness and he is co-author of the second edition of Heritage Planning (Routledge) with Dr. Hal Kalman.