Head of Surgical Services at the McGill University Health Centre and internationally renowned expert in immunobiology, he is a world authority in the field of surgical infections. As a leader in the development of laparoscopic and transplantation surgery, he has, notably, promoted liver and pancreas transplantation, placing the McGill Medical School at the forefront in this domain. Regarded as a great surgical teacher, he is also a sought-after Visiting Professor, inspiring and mentoring surgeons around the world.