He remains assistant clinical professor in family medicine at McMaster University (part-time) and adjunct professor in Environment and Resource Studies at the University of Waterloo. He is a past vice-president of International Physicians for the Prevention of Nuclear War (IPPNW), which won the 1985 Nobel Peace Prize and former president of Physicians for Global Survival (PGS) and has written and lectured around the world about peace through health. He was founding director of the Global Health Office at Western University and has conducted research related to international health experiences including the impact of overseas electives on host communities and students.