He joined the Department of Medical Oncology and Hematology at Princess Margaret Cancer Centre in 2012 and is an Assistant Professor at the University of Toronto. He cares for patients with melanoma and gynecologic malignancies and is the director of the Princess Margaret Immune Monitoring Laboratory. His work focuses on the development of immunotherapy trials, which include studies, alone and in combination, of immune checkpoint blocking antibodies, immunomodulators, and adoptive cell transfer.