Field of research: Algebraic Geometry, moduli spaces and enumerative geometry
1989 Diplom in Mathematics Universität Bonn, advisors F. Hirzebruch, A. Sommese
1992 PhD Mathematics Universität Bonn, advisor F.~Hirzebruch
1997 Habilitation Universität Bonn

1992-97 Postdoctoral Positions at Trento, Max-Planck-Institut für Mathematik Bonn, University of Pisa, Mittag-Leffler Institut, Stockholm
Since 1997 at ICTP Trieste: 1997-1998 Tenure track scientist, 1999-2001 Assistant research scientist,
2002-2011 Research scientist at ICTP, 2011-now Senior Research scientist
Longer term visiting positions at: Stanford University, University of Chicago, Universite Paris Sud, MSRI Berkeley,
Institute Mittag-Leffler (Stockholm), Newton Institute (Cambridge), Institute Henri Poincare (Paris), IMPA (Rio de Janeiro), Max-Plank-Institut für Mathematik Bonn, Institute for Advanced Studies (Princeton), University of British Columbia (Vancouver)

1998 Whittemore lectures at Yale University
2002 Invited speaker International Congress of Mathematicians, Beijing
2011 Hirzebruch Research Chair at Max-Planck-Institut für Mathematik, Bonn
2012 Fellow of the American Mathematical Society