Born 1955, in Rotenburg/Wümme. Study of Physics, doctorate Univ. of Hannover (1980). Acting Assistent Professor of Physics at the Stanford Univ., USA (1986-1989). Professor (C4) at the Univ. of Hannover (1993). Director of the Institute for Gravitational Physics at the Univ. of Hannover (since 1993). Director and Scientific Member at the MPI for Gravitational Physics (Albert Einstein Institute) at Hanover (since 2002).