He was Chairman of the Institute of Egyptology (1984-2009) and of the Vienna Institute of Archaeological Science (2004-2011) at the University of Vienna and Chairman of the Commission for Egypt and the Levant at the Austrian Academy of Sciences.
Dia adalah Ketua dari Institute of Egyptology (1984-2009) dan Vienna Institute of Archaeology Science (2004-2011) di Universitas Wina dan Ketua Komisi Mesir dan Levant di Austrian Academy of Sciences.