Born 1957 in Frankfurt am Main. Study of computer science at TU Darmstadt, doctoral dissertation at TU Darmstadt (1986), Research Associate and Postdoc at TU Darmstadt (1987), MCC in Austin (1988-1989), and ETH Zurich (1989-1990), Professor at ETH Zurich (1990-1994) and Saarland University in Saarbruecken (1994-2003), Director and Scientific Member at Max-Planck Institute for Informatics (since 2003).