Electrical Engineering Working Student München Vollzeit Vaeridion GmbH PhD student (f_m_x) Rock physics - GEOZEIT/HyPrepare project [english] Potsdam Vollzeit Deutsches GeoForschungsZentrum - GFZ Speculative application for student assistants, interns, and theses (IOF-2022-51) Jena Vollzeit Fraunhofer-Gesellschaft