2006-2012 Head of Research Division "The Americas", SWP, Berlin
2000 Habilitation, University of Augsburg, Augsburg
1991-1992 Research Fellow, Center for Science and International Affairs, Harvard University, Cambridge
1988; Research Associate, SWP, Ebenhausen/Berlin
1985-1987 Research Associate, Peace Research Institute Frankfurt, Frankfurt am Main
1984-1985 Congressional Fellow of the American Political Science Association, U.S. Congress, Washington, D.C.