The CSS Research Team comprises Research Fellows working on various ongoing projects at the CSS and is coordinated by Prof. Dr. Stefan Kaufmann.

Prof. Dr. Stefan Kaufmann

Stefan Kaufmann, Dr. Phil., is Associate Professor at the Institute of Sociology of the University of Freiburg and Research Coordinator of the Center for Security and Society. He taught at the Universities of Basel and Leipzig, was Research Fellow at the ETH Zurich and at the Center for Interdisciplinary Research at the University of Bielefeld, and has held visiting professorships for cultural sociology at the University of Freiburg and for media theory at the University of Siegen. His work focuses on the sociology of security, war, technology and space. He is co-editor of the European Journal of Security Research and heads several third-party funded research projects on civil security at the CSS in Freiburg.

André Biermann

André Biermann has been a Research Fellow under the guidance of Prof. Stefan Kaufmann since 2014. He worked as a research assistant in the project EVADEX, funded by the Federal Ministry of Education and Research (Germany). Since March, 2017, he belongs to the research group working on the project POLINEX. His doctoral dissertation scrutinizes how actors (notably operators) comply with their task of providing security despite the everyday unrecognition of concrete threats. His primary research interests involve: sociology of knowledge and its approach to discourse (SKAD) as well as sociology of attitudes and technology.

Sabine Blum

Sabine Blum is a Research Fellow working under supervision of Prof. Dr. Stefan Kaufmann in the BMBF-endowed project SIKET (January 2019 onwards). As a sociologist and member of the CSS Research Team she has worked in the EU Horizon 2020 Project NeTIRail-INFRA and in project Resilienzmaße/ Resilience Indicators (Sustainability Center Freiburg). Her research interests include the sociology of in-/security, risk and resilience; political and cultural sociology.

Dr. Björn Brömmelsiek

Björn Brömmelsiek, PhD, is working as of May 2019 as coordinator and science manager to the Fachdialog Sicherheitsheitsforschung (research on civil security), which is coordinated by the CSS.
Previously, he was the scientific coordinator to the trinational and transdisciplinary Interreg project Graduate Academy SERIOR at the University of Coblenz-Landau. He completed a PhD in socio-linguistics about multilingualism and identity at the Université de Montréal, Canada.


David Czudnochowski

David Czudnochowski has been working as a Research Fellow in Prof. Dr. Stefan Kaufmann’s Research Team at the CSS since April 2019. He works on the project „ZuRecht – Die Polizei in der offenen Gesellschaft“. His research focus on ethnographic fieldwork and questions about knowledge and information in everyday practice of police officers. He gained scientifical experience in criminological and medicalsociological research projects. At the moment he is preparing his PhD-project.

Dr. Nils Ellebrecht

Nils Ellebrecht has been a Research Fellow at the Institute of Sociology working under supervision of Prof. Dr. Stefan Kaufmann since 2009. His doctoral dissertation, focusing on "Organized Rescue", unfolds the sociological dimensions of emergencies and the implications of emergency routines. His research interests include the sociology of organization, new technologies and medicine.

Dr. Sabrina Ellebrecht

Sabrina Ellebrecht has been part of the CSS Research Team since 2014. She has been working as a Research Fellow under supervision of Prof. Dr. Stefan Kaufmann in both the EU-endowed project BESECURE and the BMBF-endowed project KOMPASS. Her work focuses on political sociology as well as on sociology of borders, of Europe, and of technology; Her PhD deals with the European Border Surveillance System (EUROSUR) and the refugee-boat as vehicle, targeted object of surveillance and legal territory. Since 2016, Ellebrecht works as research consultant on the CSS-based Security Research Dialogue (SiFo).

Linus Feiten

Linus Feiten has been working as a Research Fellow at Prof. Dr. Bernd Becker's Chair of Computer Architecture since October 2010. His research focuses on "Hardware Security and Trust", with a particular interest in question as to how to establish general trust in digital security mechanisms that, for laypeople, are mostly hard to comprehend. His other research is on web applications for academic teaching and political scientific evaluations. Furthermore, he is working for the transdisciplinary Graduate Academy SERIOR.

Dr. Marc Herbstritt

Dr. Marc Herbstritt joined the CSS as a member of the Fachdialog Sicherheitsforschung (research on civil security) in March 2019 where he takes care of information security and data protection. He has studied Computer Science and Microsystems Technology at University Freiburg and got a PhD from the same university for his work on SAT-based verification. For several years, he was a member of the scientific staff of Schloss Dagstuhl - Leibniz Centre for Informatics where he was, among others, in charge of setting up and operating the open-access publishing unit "Dagstuhl Publishing".

Markus Jenki

Markus Jenki is a Research Fellow in Prof. Dr. Stefan Kaufmann's Research Team at the CSS. After finishing project KOMPASS, which aimed at designing, elaborating and implementing an integrative management system for patient care in large scale accidents at sea, he is now working on the project SIKET (Evaluation and Improvement of Railway Tunnel Rescue Concepts). Combining computer based simulations of pedestrian and evacuation dynamics and real-world large scale exercises existing security concepts of railway tunnels should be reviewed and increased.

Philipp Johner

Philipp Johner has been working as a researcher at the CSS since September 2018 and is involved in the BMBF-funded project “Multimodal Remote Detection of Hidden Threats in Security Checks (HITD)”.
Previously, in February and March 2018, he was a research assistant to Prof. Dr. Thomas Würtenberger on the EVADEX project. He is also a PhD student at the Institute of Staatswissenschaft and Philosophy of Law, Department 2.



PD Dr. Elisa Orrù

Elisa Orrù is Lecturer (“Privatdozentin”) for Philosophy and currently leads the Freiburg research contribution to the EU H2020 project TRESSPASS on ethical issues of digital and AI-supported border controls. Since her joining the Centre for Security and Society in 2013, she has contributed to several European interdisciplinary research projects. In the context of the project SERIOR, she was involved in establishing a tri-national graduate academy between Germany, Switzerland and France. As lead of the work package on societal aspects of railway innovations of the Horizon 2020 Project NeTIRail-INFRA she focused on key issues of ethics of technology. Previously, her contribution to the European FP7-Project SURVEILLE consisted in exploring the societal and ethical implications of emerging surveillance technologies.  



Sarah Praunsmändel

Sarah Praunsmändel joined the CSS Research Team in 2019. She is involved in the project „ZuRecht – Die Polizei in der offenen Gesellschaft“ and her research focuses on information and communication obligations as well as police decision making. She is a doctoral student of Prof. Dr. Ralf Poscher and lecturer for Public Law at Fulda University of Applied Sciences (Hochschule Fulda).

Dr. Jan Schank

Dr. Jan Schank is a member of the CSS team since October 2018, working on the project SUSQRA. Previously, he has been employed on the project “Media Practices of Parliamentary Discourses” at the Goethe-University Frankfurt/M. He has held teaching appointments at Ruhr-University Bochum, where he also gained his PhD, in 2015, with a dissertation on the practices of age-rating computer games (supervised by Estrid Sørensen). His research interests include Science & Technology Studies (STS), Ethnomethodology and Conversation Analysis, Ethnography, as well as the Sociologies of Law and of Politics.

Stefan Uhl

Stefan Uhl has been working as a researcher at the CSS since February 2019 and is involved in the BMBF-funded project “Multimodal Remote Detection of Hidden Threats in Security Checks (HITD)”. He is also a PhD student and research assistant at the Institute of Criminal Law and Criminal Procedural Law, Department 3, of Prof. Dr. Dr. h.c. Walter Perron.

Laura Wisser

Laura Wisser joined the CSS Research Team in 2019. She is a member of the research group „Zu Recht – Die Polizei in der offenen Gesellschaft“. Her work focuses on legal questions regarding the recruitment of police staff and the aspects of qualification and representation. Her thesis is supervised by Prof. Dr. Ralf Poscher.