September 1990 --- July 1991: St. Patrick's College, Maynooth
September 1992 --- July 1996: Peterhouse, University of Cambridge
September 1996 --- June 2002: Rutgers, The State University of New Jersey
July 2002 --- June 2004: Microsoft Corporation
September 2004 --- August 2004: Institute for Advanced Study
July 2005 --- June 2007: University of Pennsylvania
This page created by David Galvin, and last revised on August 23, 2005.