John supports policymakers and stakeholders to use evidence to address societal challenges. He is co-lead of and lead report writer for the Global Commission on Evidence to Address Societal Challenges, as well as co-lead of the COVID-19 Evidence Network to support Decision-making (COVID-END) and Rapid-Improvement Support and Exchange (RISE). He is the Director of the McMaster Health Forum and Director of the WHO Collaborating Centre for Evidence-Informed Policy. He is a Professor in the Department of Health Evidence and Impact at McMaster University and the Canada Research Chair in Evidence-Support Systems, as well as Adjunct Professor at the Africa Centre for Evidence at the University of Johannesburg. He holds an MD from Queen's University, an MSc from the London School of Economics, and a PhD (in Health Policy) from Harvard University.