Gillian is the president and CEO of St. Joseph's Health Care, a multi-site academic health care organization serving the London, Ontario, region. Before assuming this role in 2010, she spent 17 years as vice-president, medical, for various hospitals in London. She received the Canadian Society of Physician Leaders’ Excellence in Medical Leadership Award in 2018.
After completing her residency at St. Joseph’s Hospital in 1984, Gillian joined the staff of St. Joseph’s, Parkwood Hospital and the London Health Sciences Centre as a family physician, practising until 2010. She was an associate professor with the Schulich School of Medicine and Dentistry until 2020.
Gillian has also served on numerous provincial and national boards and committees. Some of her past positions include co-chair of the Canadian Health Leadership Network, president of the Canadian Society of Physician Executives and member of the board of the Canadian Resident Matching Service (CaRMS). She was also chair of the Catholic Health Association of Ontario and recently completed a six-year term on the board of the Ontario Hospital Association. She is an inaugural board member of Supply Ontario (2021).