Associate Professor,
July 2011 - present
Department of Mathematics and Statistics
York University
Assistant Professor,
July 2004- June 2011
Department of Mathematics and Statistics
York University
JSPS Short Term Postdoctoral Fellow,
June-July, 2004
Graduate School of Information Sciences
Tohoku University, Japan
Bateman Research Instructor,
September 2002-June 2004
Department of Mathematics
California Institute of Technology
Assistant Professor,
September 2001-August 2002
Department of Combinatorics and Optimization
Faculty of Mathematics,
University of Waterloo