Advisor to the President, 2004-2015.
Executive Director, Penn National Commission on Society, Culture, and Community, 1996-2004.
Assistant to the President, 1990-2004.
Interim Director, 21st Century Project for the Undergraduate Experience, 1997-98.
Administrative Fellow, Offices of the President and Provost, 1987-90.
Assistant Dean, School of Arts and Sciences, 1978-87.
Lecturer in Philosophy, 1981-present.
Lecturer in Communication, Spring 2006, Annenberg School for Communication.
Faculty Advisor, College of Arts and Sciences, 1990-present.
Affiliated Faculty, Solomon Asch Center for the Study of Ethnopolitical Conflict, 1999-present.
Affiliated Faculty, Institute for Strategic Threat Analysis and Response, 2002-present.