Born 1952 in Berlin. Study of Mathematics at FU of Berlin (Diploma 1975, Dr. rer. nat. 1976), study of Computer Science at Stanford University, California (PhD 1979), Staff at Bell Laboratories, Murray Hill (1979-1981), Scientist at the Computer Science Department of Saarland University, Saarbrücken, Germany (1981-1984) Habilitation in Computer Science (1984), Professor of Computer Science at Univ. Paderborn (1984-1992), Director of the Institute for Algorithms and Scientific Computing at GMD-German National Research Center for Information Technology, Sankt Augustin, and Professor of Computer Science at the Univ. of Bonn (1992-2001), Director and Scientific Member at the Institute for Informatics as well as Professor of Computer Science at Saarland Univ. (since 2001). Emertius.