Michael's Hospital. He is Chair of the Ontario College of Family Physicians' Committee on Poverty and Health. He played central roles in founding Inner City Health Associates (a group of physicians working with the homeless) and the advocacy group Health Providers Against Poverty. He is engaged in the development of clinical tools and the education of medical students, residents, and practicing family physicians on interventions into poverty. He works toward a reduction in the impact of poverty, homelessness and other social determinants of health, through engagement with his community of practice, health providers, medical organizations, the media, and policy makers. While he has engaged with issues of international health, his current geographic focus is on Toronto, Ontario, and Canada.