Ph. D., various teaching positions at Johns Hopkins University School for Advanced International Studies, 1976-1987, Zentrum fur Antisemitismusforschung, Technische Universität Berlin, 1999. Wissenschaftlicher Mitarbeiter, Institut fiir Zeitgeschichte, Munich, 1976-1980, and at Landesarchiv Berlin, 1980-1981. Director of Archives, U. S. Holocaust Memorial Museum (USHMM), 1984-1997. Director of International Programs, USHMM, 1997-1999. Associate Director of International Programs Division, USHMM, 1999.

Publications include: Co-ed., The Liberation of the Nazi Concentration Camps 1945. Eyewitness Accounts of the Liberators (1987), Death Mills. An Early Attempt at Mass 'Reeducation' in Occupied Germany 1945-1946 in George O. Kent, ed., Archivists and Historians. Essays in Modern German History and Archival Policy (1990), The Archival Resources of the U. S. Holocaust Research Institute of the U. S. Holocaust Memorial Museum in Randolph Braham and Attila Pok, eds., The Holocaust in Hungary: 50 Years Later (1997).