Board member since 2007. Chairman of the Personnel Committee. Member of the Corporate Governance and Nomination Committee.Ph.D. (Theoretical Physics) (Technical University of Brunswick).Co-CEO and Chairman of the Executive Board of SAP AG 2008-2009. CEO of SAP 2003-2008. Co-chairman of the Executive Board of SAP AG 1998-2003. A number of leadership positions in SAP AG since 1982. Member of SAP Executive Board 1991-2009. Taught physics and computer science at the Technical University of Brunswick and the University of Mannheim 1980-1992, became professor in 1985.Member of the Supervisory Boards of Bayerische Motoren Werke Aktiengesellschaft (BMW AG), Deutsche Bank AG, Deutsche Post AG and Münchener Rückversicherungs-Gesellschaft AG (Munich Re). Member of the Board of Directors of Wipro Ltd. President of Deutsche Akademie der Technikwissenschaften. Member of the Honorary Senate of the Foundation Lindau Nobel prizewinners.