1998-2006: Director at the Zentrum für Zeithistorische Studien, Potsdam
1994-1998: Co-director of UNC/Duke Center for European Studies
since 1983: Lurcy Professor of European Civilization, University of North Carolina,
1968-1983: Assistant to Full Professor of History at the University of Missouri/Columbia

Auswahl:
Two Germanies, 1961-1989 (Washington, DC, 2006), volume IX of internet German History in Documents and Images, edited with Helga Welsh
Risse im Bruderbund. Die Gespräche Honecker – Breshnew 1974 bis 1982 (Berlin, 2006), coedited with Hans-Hermann Hertle
After Hitler: Recivilizing Germans 1945-1995 (New York, 2006)
Demokratiewunder. Transatlantische Mittler und die kulturelle Öffnung Westdeutschlands 1945-1970 (Göttingen, 2005), edited with Arndt Bauerkämper and Markus Payk
Zerbrochener Spiegel. Deutsche Geschichten im 20. Jahrhundert(Munich, 2005),co-authored with Michael Geyer

Editor of the hybrid journal “Zeithistorische Forschungen/Studies in Contemporary History,”
Editorial board member Jahrbuch für Universitätsgeschichte, Historisch-Sozialwissenschaftliche Forschungen
Editorial board member of Comparativ
Former board member of History of Higher Education Annual, Central European History, German Studies Review, History of Education Quarterly, and others

Auswahl:
Überlegungen zur Positionsbestimmung deutscher Geschichtswissenschaft, in: zeitenblicke 4 (2005), Nr. 1
Kriegsende 1945. Schmerzhafte Erfahrungen und langwierige Lenrprozese, in: Deutschland Archiv 2005, Nr. 2 : 230-236.
Critical Memory and Civil Society: The Impact of the 1960s on German Debates about the Past, in : Philipp Gassert and Alan Steinweis, eds., Coping with the Nazi Past: West German Debates on Nazism and Generational Conflict, 1955-1975 (New York, 2006), 11-30.
Anfänge der Berliner Republik (1990-2005), in: Ulrich Hermann et al., Kleine Deutsche Geschichte (Stuttgart, 2006), 477-510.
The Collapse of Communism and the Search for Master Narratives : Interpetative Implications of German Unification, in: TELOS 136 (Fall 2006), 59-75.