* University Faculty Scholar, The University of Western Ontario: 2005–2007
* Professor of Chemistry, The University of Western Ontario: 2005–present
* Associate Professor, The University of Western Ontario: 2000–2005
* Assistant Professor, The University of Western Ontario: 1995–2000
* Associate Research Officer, National Research Council: 1994–1995
** Steacie Institute For Molecular Sciences
** Organic Reactions Dynamic Group
* Research Associate, National Research Council: 1992–1994