2007 - present: Hagey Family Professor of Mathematics, Williams College
1984 - 2007: Assistant Professor, Associate Professor, Professor of Mathematics, Williams College
Fall 94: Acting Chair, Mathematics Department, Williams College
Visiting Postions:
Fall 95: SUNY at Albany
May 92: Université Paris Sud, France
Spring 92: University of Toronto
Fall 91: Swarthmore College
1987 - 1988: University of Maryland, College Park