Ken Mayhew is a dynamic and highly respected senior fundraising executive with a passion for cultivating donors who share William Osler Health System’s (Osler) commitment to deliver exceptional health care close to home. Through his exemplary leadership, William Osler Health System Foundation (Osler Foundation) has experienced continuous revenue growth, recently exceeding its $100M campaign goal to support redevelopment and ongoing equipment needs at Osler’s Brampton Civic Hospital, Etobicoke General Hospital and Peel Memorial Centre for Integrated Health and Wellness.

Prior to joining Osler in 2012, Ken spent over 20 years with the MS Society of Canada where he was responsible for all aspects of marketing, communications, media and fund development for a program with almost one million active donors, raising over $50M annually. 

An active and passionate volunteer, Ken is the Past Chair of the Association of Fundraising Professionals (AFP) Canada. He is also Past President of the local AFP chapter. Ken’s ongoing involvement with AFP, Imagine Canada and the Rideau Hall Foundation includes advocacy work to encourage legislative initiatives to recognize and grow philanthropy in Canada. He is a frequent fundraising spokesperson and has been featured in numerous books, podcasts, panels, interviews and media pieces.    

In recognition of his enduring impact on his community and country, Ken is a 2025 recipient of the prestigious King Charles III Coronation Medal, a commemorative honour that recognizes outstanding service and dedication, high professionalism, and achievements by those who have helped build the Canada of today.

Additionally, among many honours, Ken’s work in inclusive board and fundraising development has been recognized with a CEO in Action award from the Diversity Journal. He was named 2019 Fundraiser of the Year by the Greater Toronto Chapter of AFP and named a Paul Harris Fellow in 2022. The highest award in Rotary, the Paul Harris Fellow is given to a member of the public who has made an outstanding contribution to the community. In 2024, Y Media named Ken one of Canada’s 100 Most Influential Leaders and granted him its Community Impact Award.

Ken has authored the introduction to the book Worthy and Prepared by Ed Sluga and Peter Barrow on assessing and activating organizational fundraising readiness and capacity, and his career as “The Fundraiser” is featured in Peter Mansbridge’s latest book How Canada Works – The People Who Make Our Nation Thrive.