Internship/Thesis "Development of a Heliostat Field Design and Optimization Methodology" Freiburg Vollzeit Fraunhofer-Gesellschaft Director PMO (m/f/d) Karlsruhe Vollzeit Vulcan Energie Ressourcen GmbH PhD student (f_m_x) Rock physics - GEOZEIT/HyPrepare project [english] Potsdam Vollzeit Deutsches GeoForschungsZentrum - GFZ