Managing director at the Max Planck Institute for the Study of Crime, Security and Law in Freiburg and honorary professor at the University of Freiburg. After being the managing director of the Centre for Security and Society at the University of Freiburg (2013-2018) Professor Poscher became dean of the University´s Faculty of Law (2018) before assuming his position at the Max Planck Institute for the Study of Crime, Security and Law in Freiburg (2019). He has published numerous books and articles on German constitutional rights and German police law as well as legal theory and philosophy. In two of his latest articles he explores the function of the proportionality principle in fundamental rights law and the impact of AI-technologies on the understanding of the right to data protection (both available on SSRN).