Rolf Krahl is responsible for scientific data management at Helmholtz-Zentrum Berlin für Materialien und Energie (HZB). HZB operates large scientific facilities, such as the BESSY II synchrotron light source and users from all over the world come to Berlin to use these facilities for their research. Rolf's task is to setup and manage a data repository for the preservation and long term archival of the scientific data collected at HZB's instruments. He has a background in mathematics. Before joining HZB, he has been developing software for scientific computing, mainly in the field of Computational Fluid Dynamics.