Employment: 1993 to present Research Scientist at the Karlsruhe Institute of Technology (KIT), Germany (former Forschungszentrum Karlsruhe) Institute of Meteorology and Climate Research Department Atmospheric Aerosol Research (IMK-AAF). Since 2014: Leader of Research Group “Aerosol-Cloud Processes”. Since 2007: Deputy Head of IMK-AAF. Jan to Mar 2004: Visitor scientist at the National Center for Atmospheric Research (NCAR) hosted by Dr. Andy Heymsfield, Department for Mesoscale and Microscale Meteorology. 1997 to 2014: Leader of research group „Stratospheric Aerosols and Cloud Physics“. 1989 to 1992 Postdoctoral researcher at the Max Planck Institute for Nuclear Physics, Heidelberg, Germany, research group of Prof. Frank Arnold on Atmospheric Physics. Education: 1986 to 1989 PhD at the University of Heidelberg, Germany Thesis on „Mass spectrometric ambient ion measurements and laboratory investigation of ionmolecule reaction kinetics“ under the supervision of Prof. Frank Arnold, Max Planck Institute for Nuclear Physics, Heidelberg. 1980 to 1986 Studies of Physics at the University of Heidelberg, Germany. 1986 Physik Diplom (“M.Sc. in physics”). 1983 Physik Vordiplom (“B.Sc. in physics”). Committee Memberships: 2022 to present Board of the Gesellschaft für Aerosolforschung e.V. (GAeF). 2015 to 2021 Committee on Atmospheric Chemistry, American Meteorological Society (AMS). 2014 to 2019 Steering Committee for the KIT Division IV – Natural and Built Environment. 2012 to present International Commission on Clouds and Precipitation (ICCP). 2012 to 2016 Board of the Gesellschaft für Aerosolforschung e.V. (GAeF). 2011 to 2018 KIT Konvent. 2009 to present International Committee on Nucleation and Atmospheric Aerosols (ICNAA). 2009 to 2011 KIT Council for Research and Promotion of Young Scientists (CRYS). 2009 to 2011 Steering committee KIT Competence Area Earth and Environment. 2009 to 2016 Steering committee KIT competence field Atmosphere and Climate. Professional Services: 2021 to present Advisory Board member of Environmental Science: Atmospheres, published by the Royal Society of Chemistry. 2017 to 2020 Co-chair of the Symposium on Aerosol–Cloud–Climate Interactions as part of the AMS (American Meteorological Society) Annual Meeting. 2014 to present Chair of mineral dust, cloud condensation and ice nucleation related sessions of the Symposium on Aerosol–Cloud–Climate Interactions as part of the AMS Annual Meeting. 2012 to 2014 Member of the steering committee for the NCAR ICE-D project. 2009 to present Co-Editor of Atmospheric Chemistry and Physics. 2004 to 2006 Member of the steering committee for the NCAR ICE-L project. Reviewer for Journals: Nature, Nature Geoscience, Science, Atmospheric Chemistry and Physics, Atmospheric Measurement Techniques, Journal of Geophysical Research, Geophysical Research Letters, Journal of the Atmospheric Sciences, Environmental Research Letters. Reviewer for funding agencies: Deutsche Forschungsgemeinschaft (DFG), European Research Council (ERC), Swiss National Science Foundation (SNF), UK Natural Environment Research Council (NERC), Academy of Finland, US National Science Foundation (NSF), US Department of Energy (DOE). Teaching: 2018 to present Lecture „Atmospheric Aerosols“ (with exercises), KIT Meteorology and Climate Physics Master of Science (M.Sc.). 2017 to 2018 Lecture „Atmosphärische Chemie und Aerosole“ (with exercises), KIT Meteorologie Master of Science (M.Sc.). 2012 to 2016 Lecture „Atmosphärische Aerosole“ (with excercises), KIT Meteorologie Diplomstudiengang. 2010 to 2015 Lecture on “Aerosol- und Wolkenmessungen” as part of course on “Fortgeschrittene Messverfahren für Meteorologen”, KIT Meteorologie Diplomstudiengang. 2009 to2011 Lecture „Atmosphärische Aerosole und Wolken“, KIT Meteorologie Diplomstudiengang