He is a staff physician in the Division of General Internal Medicine and Geriatrics at the University Health Network and Mount Sinai Hospital, a senior scientist at the Toronto General Research Institute and the Toronto Rehabilitation Institute, and a prior Research Scientist of the Canadian Cancer Society. His research interests are in geriatric oncology, particularly in the impact of disease and treatment on quality of life and function of patients with prostate cancer, the value of geriatric assessment in older adults with cancer, and randomized trials of exercise to improve outcomes in older adults with cancer. Since 2015, he is also the medical lead for the geriatric oncology program at the Princess Margaret Cancer Centre, Canada’s largest academic cancer centre.