He has played a major role in developing McMaster University's medical school into a centre of excellence. As Dean and Vice-President of Health Sciences, he cultivated a thriving environment where the latest research techniques can be explored. Considered a world authority on mucosal immunology and allergy, he is widely consulted for his expertise. At the request of the Australian government, he conducted an in-depth examination of their medical research council. His report became the catalyst for extensive reform and he has concluded a similar study for Sweden.