Dr. Keast is a native of London Ontario, graduating from Western University with a Master's Degree in Chemistry. He taught High School for eleven years before entering medicine at Queens University graduating in 1985. He practiced family practice for 25 years before focusing his practice in Wound Care. He is a past president and a founding board member of the Canadian Association of Wound Care.

He is currently the president of the World Alliance for Wound and Lymphedema Care and Director of the Canadian Lymphedema Framework.  Dr. Keast is an internationally recognized educator and has participated on many national and international advisory panels.