· Fellow of Computer Science, St. Michael's College, University of Toronto2022–
· Chief Science Officer, Private AI2017–2021
· Fellow of Computer Science, University of Toronto, Trinity College2012–
· Visiting Researcher, International Computer Science Institute, Berkeley2011–
· Professor in the Department of Computer Science, University of Toronto2001–
· Research Scientist, Bell Laboratories1998–2001
· Research Scientist, Eberhard Karls University of Tübingen1996–1999
· Professor, University of Toronto