Instructor in Political Science, University of Michigan, 1966-1967
Assistant Professor, University of Michigan, 1967-1972
Visiting Professor, University of Geneva, 1969-1970 and Summer Terms 1971, 1972, 1973, 1974, 1975, and 1977
Associate Professor, University of Michigan, 1972-1978
Professor, University of Michigan 1978-
Visiting Professor, University of Mannheim, 1978-1979
Fulbright Distinguished Lecturer, University of Kyoto and Doshisha University, Summer, 1980
German Marshall Fund Distinguished Visiting Lecturer, Free University of Berlin, summer 1988
Visiting Professor, Leiden University, summer, 1992.
Visiting Scholar, Academia Sinica, Taipei, Republic of China, summer, 1994.
Visiting Scholar, Berlin Science Center for Social Research, summer, 1997.
Visiting Professor, University of Rome (La Sapienza), summer, 1998, 1999.
Visiting Scholar, Berlin Science Center for Social Research, summer, 2001, 2002, 2003, 2004, 2005, 2006.
Director, Laboratory for Comparative Social Research, Higher School of Economics, St Petersburg and Moscow, 2010- present.
Fulbright Scholar, Leiden University, The Netherlands, 1963-1964
Faculty Associate, Center for Political Studies, Institute for Social Research, University of Michigan, 1974-1985.
Associate Chair, Department of Political Science, University of Michigan, 1976-1978.
Faculty Associate, Ph.D. Program in Urban, Technological and Environmental Planning, University of Michigan, 1981-1983.
Visiting Research Fellow, International Institute for Environment and Society, Berlin Science Center, 1982.
Chair, Interdisciplinary Studies in Urban, Technological and Environmental Planning, University of Michigan, 1983-1986.
Program Director, Center for Political Studies, Institute for Social Research, University of Michigan, 1985-