He did his Medical Internship at the University of California San Francisco, military service in the USNR at the Tissue Bank [1], National Naval Medical Center, Bethesda, Medical Residency on the II & IV (Harvard) Medical Service at Boston City Hospital, and a Research & Clinical Fellowship at the Peter Bent Brigham Hospital(now Brigham & Women's Hospital) and Harvard Medical School.

In 1969, he was appointed associate in medicine at the Peter Bent Brigham Hospital and instructor in medicine at Harvard Medical School, and permanently moved to Montreal, Canada in 1970 to become director of the transplantation service at the Royal Victoria Hospital and McGill University Clinic and associate professor of medicine, McGill University Faculty of Medicine.

During his academic career he directed an active basic and clinical research laboratory program focused on transplantation immunobiology, immunogenetics, immunosuppression, and long term-complications of transplant patients.

He also developed an interest in social and ethical issues of transplantation, organ shortage, and human rights abuses.

He has held numerous executive positions in professional organizations such as The (International) Transplantation Society [2], American Society of Transplant Physicians (renamed American Society of Transplantation)[3], Canadian Transplantation Society [4], XVII World Congress of The Transplantation Society Inc. [5], is a Fellow of the Royal College of Physicians & Surgeons of Canada [6], is a Fellow of the Canadian Academy of Health Sciences [7], and is an Emeritus Member of the American Society for Clinical Investigation [8], and the Association of American Physicians [9] Currently he is emeritus professor of medicine, McGill University, Montreal; executive vice-president, clinical and international development, BioMosaics Inc.; and an active biomedical and biotechnology industry consultant.