· Co-founder and Principal Investigator, University of California, Berkeley2016–
· Professor, Cornell University1997–
· Research Scientist, AT&T Bell Laboratories1990–1997
· Course Instructor, University of Toronto1989–
· Teaching Assistant, University of Toronto1986–1989
· PhD in Computer Science, University of Toronto1985–1991
· MS in Computer Science, University of Toronto1983–1985
· M.Sc. in Physics, Delft University of Technology1979–1983