Title of research: An Ounce of Prevention: How to Prevent International Crimes. Jennifer Schense is a PhD candidate at the Grotius Centre for International Legal Studies at Leiden University. She is researching the international obligation to prevent crimes and how that obligation may be fulfilled,…

Dr. Sarah Carthy is an assistant professor in terrorism an political violence at the Institute of Security and Global Affairs. She is a graduate of the University of Galway where she completed her BA and PhD in Psychology. Her research mainly focuses on radicalisation, evidence-based approaches to prevention…

Nina Komrij works as a postdoctoral researcher at the Developmental and Educational Psychology unit of the Institute of Psychology at Leiden University.

Layla van Wieringen is a Researcher/Tutor at the Institute of Security and Global Affairs for the research group Physical Violence and Public Order. Her research focuses on the intergenerational transmission of extremism and other potentially harmful ideologies within a family context.

Olga Bogolyubova is an Assistant Professor at the Institute of Security and Global Affairs. Her research interests are focused on violence and its impact on mental health, mental health literacy, technology-facilitated violence, and psychology of online behaviors.

As professor of Violence and Policing, I study various forms of violence in public spaces and how violence is used to enforce the moral and legal order. My research focuses on violence between (groups of) youth, threatening and violent confrontations between police and citizens, public disorder,…

Pieter Tops holds the special chair in Organised and Subversive Crime Studies established and funded by the Police Academy.

Monica den Boer is professor by special appointment of Police Studies at the Institute of Security and Global Affairs. Monica currently holds the Chair on Military Policing Operations at the Netherlands Defence Academy in Breda, a position she has occupied since 2020. Previously, she served as a Member…

Saniye Çelik holds the position of Special Professor of Diversity and Inclusion at the Police, affiliated with the National Police. Her research interests encompass leadership and culture, creating safe and inclusive teams, personnel recruitment and retention, and fostering connections between public…

Merel Sprenger is a postdoctoral researcher at the Institute of Security and Global Affairs (ISGA), studying femicide in the Netherlands by linking data from the Dutch Femicide Monitor with CBS microdata.

The final course examination regulation means that a student is given an extra chance to take an exam in a subject, deviating from the provisions in the Course and Examination Regulations (which state that an exam opportunity is offered twice a year per subject), with the aim of preventing a study delay…

Marieke Liem is professor of Security and Interventions at Leiden University, where she and her team coordinate the European Homicide Monitor. A graduate of University of Cambridge in the U.K., Marieke Liem completed her PhD in Forensic Psychology from Utrecht University, the Netherlands. Before joining…

Christof Nägel is an Assistant Professor in the Violence and Violence Prevention research group at Leiden University. He is a sociologist by training and previously held teaching and research positions at the University of Cologne, Utrecht University, and the German Police University in Münster.

Nienke de Groes is a PhD candidate at the Institute of Security and Global Affairs, Leiden University.

Paul Nieuwbeerta is full Professor of Criminology at the Institute of Criminal Law and Criminology of Leiden University since 2009.

Jan Crijns (1978) is Professor of Criminal Law and Criminal Procedure at the Institute of Criminal Law and Criminology of Leiden University. From 15 February 2024, he holds the position of Vice Dean of Leiden Law School.

Hilde Wermink is Associate Professor of Criminology at the Institute of Criminal Law and Criminology at Leiden University. She is also the PhD dean of Leiden Law School.

Since November 2014 Jan de Keijser is working as a Professor of Criminology at the Institute of Criminal Law and Criminology.

Leiden University wants to provide a pleasant and stimulating environment for its students and staff. Team spirit, respect and consideration of others are considered normal forms of conduct. The Executive Board has established the Complaints Committee for Unacceptable Behaviour to ensure an appropriate…

If you have a complaint or if you experience problems at work, we hope you can find a solution in consultation with your supervisor or one of the confidential counsellors. If this is not the case or if there are other reasons preventing you from seeking help, you can also contact one of the committees…

From 2018-2025, researchers at our faculty conducted research within two themes of the Nederlands Sectorplan Rechtsgeleerdheid (information only available in Dutch): Institutions for Conflict Resolution and Empirical Legal Studies.

Jasper De Paepe is a PhD candidate at the Institute of Security and Global Affairs. Jasper De Paepe has conducted research on local security networks, police lethal force and the interaction between experts and policy makers, as well as the acquisition of expert advice in the formulation of policy responses…

Joni Reef is an Assistant Professor of Criminology and a Research Fellow at the Department of Criminology, Leiden University.

Sigrid van Wingerden PhD LLM is Associate Professor of Criminology at the Institute of Criminal Law & Criminology at Leiden University. She is also head of the Criminology department.

Miranda Boone is Professor of Criminology and Comparative Penology at the Institute of Criminal Law and Criminology.