Leiden University strengthens the impact of its research through strategic collaborations and innovative themes. Here you will find more information about our vision on internationalisation and partnerships, as well as answers to questions such as: How do I benefit from the Leiden-Delft-Erasmus alliance?…

The following privacy and security guidelines must be adhered to when using Maileon.

You can contact the privacy or security officers with questions about privacy or data security.

In The Hague, the international city of peace, justice, and security, the Faculty of Governance and Global Affairs' bachelor's programmes offer you the opportunity to learn from experts in security and crisis response. Here, you will gain the knowledge and skills to keep people, organisations, and societies…

At Leiden University, we expect our researchers and lecturers to share our ambition to become one of the best. This is the crux of our HR policy. Read more about our policy below. Also, you will find more information about temporary staff, staff participation, leadership and how we ensure our integr…

We can all do our bit to keep our information and personal data safe. It’s easier than you think and is often about the small things. Working privacy and security smart means protecting your own data and that of your colleagues. Want to know how best to go about that? Check it out here!

Veelgestelde vragen privacy en security

Outer space is rapidly emerging as a critical domain of geopolitical and military competition. Satellites support navigation, communications, financial systems, climate monitoring and much more. At the same time, space is increasingly seen as a strategic and military domain. Countries are investing…

Leiden University is committed to providing a safe and secure environment for staff members in their work and for students during their studies here. Visitors must also be able to rely on the best possible assurance of their safety and security. We are all responsible for this.

Dr. Joana Cook is a graduate of King’s College London where she completed her MA and PhD in the Department of War Studies (BA University of Regina). Her research more broadly focuses on women in violent extremism, countering violent extremism, and counter-terrorism practices. More recent scholarly interests…

The University wants to be able to ensure a secure (digital) environment. Protecting information is the responsibility of all of us. Protect your and your colleagues' work by using secure tools and safe practices. Keep reading to find out how to handle information securely.

The university is responsible for the safety of over 40,000 people who work, study and visit around 50 buildings in Leiden and The Hague. Find out which security measures are changing and what this means for you.

Knowledge security requires that we carefully weigh opportunities against risks. The Knowledge Security Advice Desk was set up to support this process.

Our staff members, naturally including professors, are the cornerstone of our university. We set very high standards and expect them all, especially the professors, to possess recognised qualities in the areas of research and teaching, PhD supervision, academic leadership, integrity, maintaining international…

Ellen van Reuler is a lecturer at the Institute of Political Science.

Edwin Bakker is professor in Terrorism and Counterterrorism at the Institute of Security and Global Affairs in The Hague. His fields of research are radicalisation, jihadi terrorism and in particular profiles of (jihadi) terrorists. In addition, his research is focussed on dealing with (fear of) terrorism…

Júlia is a PhD Fellow in Digitalisation and Public Policy at The Hague Centre for Digital Governance.

Dr. Linde Desmaele is an Assistant Professor of Intelligence and Security at the Institute of Security and Global Affairs (ISGA) at Leiden University. Her work sits at the intersection of international relations and security studies, with a focus on nuclear politics, US alliances and European security.…

The Leiden Research Support Conference brings together colleagues from across the university to share knowledge, best practices, and innovations in research support. This annual event is an opportunity to connect, learn, and collaborate on topics that strengthen our research ecosystem. Registration…

Joachim A. Koops is Chair of Security. His research focuses on Global Security Governance and the European Union’s foreign and security policies, the role of the United Nations, European Union, NATO (and their inter-organisational relations) in peace and security as well as crisis management, peacekeeping,…

Sebastian Sewerin is Lecturer of Environmental Politics at the Institute of Political Science.

Gus Greenstein is an assistant professor at the Institute of Public Administration.

I apply data science and statistical physics methods to analyze interconnected systems, such as social and transportation networks. My main research focus is characterizing and modeling systems with time-varying and/or group interactions among their constituents, for example, academic collaborations…

One of the core concepts of the Master programme Crisis & Security Management (CSM) is ‘governance’. In the course Security Networks and Technology, the focus is on the interplay between various levels of security governance and new technological developments.

Leiden University has two active staff networks that organise various activities every year. From domestic and foreign city trips to challenging sports clinics and creative workshops. In short: fun outings where you can get to know your colleagues even better.

Valérie Pattyn is associate professor in public policy and policy analysis at the Institute of Public Administration of Leiden University, and visiting professor at KU Leuven Public Governance Institute. Her research focuses on policy design and evaluation, with particular attention for the role of…

Michael Kowalski is parttime Special Professor of Applied Ethics in Intelligence and Security. This special professorship is endowed by the Dutch National Coordinator for Counterterrorism and Security (NCTV).

The Knowledge Security Committee plays a central role in the decision-making and organisation relating to knowledge security within the university. Internationally oriented collaboration initiatives can be submitted to this committee (via the Knowledge Security Advice Desk) with a request to assess…

Tahir Abbas FAcSS is Professor of Radicalisation Studies at Leiden University’s Institute of Security and Global Affairs in The Hague. He graduated with a PhD in Ethnic Relations from the University of Warwick in 2001. His current research interests include Islamophobia and radicalisation, gender and…

Taking care of storing your data and making timely backups is a crucial step of good research data management practices because it is not possible to archive something that has been lost.

I am associate professor at the Leiden Institute of Advanced Computer Science. I work on a variety of cyber security topics, ranging from security risk management and threat modeling to mobile security and secure software development. My main goal is to make organisations more secure by improving their…

The Leiden Research Support Network is the essential network for research support professionals within Leiden University, where colleagues work together and share their knowledge to provide optimum support for researchers. The network's strength lies in the collaboration throughout faculties and ins…

Curious to find out how you can contribute to a safe working environment? Then keep reading to discover our tips for working securely. They will help you to work more safely in specific situations. This section contains tools and tips to promote safe working habits in specific situations.

Curious to find out how you can contribute to a safe working environment? Then keep reading to discover our tips for working securely. They will help you to work more safely in specific situations. This section contains tools and tips to promote safe working habits in specific situations.

The Leiden Research Support Network is the essential network for research support professionals within Leiden University, where colleagues from the various faculty (virtual) Research Support Offices and central service units work together and share their knowledge to provide optimum support for researchers…

Dr. Nikki Ikani is Assistant Professor Intelligence and Security. Her key interests are European Security and processes of warning and anticipation of international crises. Her work connects the fields of International Relations, Public Administration and Intelligence Studies. In 2023, Nikki won a NWO…

Shuang Sun is PhD in the Systems and Security cluster within LIACS.

Since the 2025-2026 academic year, a new door policy for exams has been in effect. During lectures, students are asked to register for exams. It is therefore recommended to emphasize during lectures that students must register. Students who are not registered may, under certain conditions, still participate…

Lena Riecke is a PhD candidate at Leiden University's Institute of Security and Global Affairs, researching governance challenges in the commercial spyware market. Her work integrates law, intelligence studies, and cybersecurity.

What are the sources of income of Leiden University? And how do we preserve the effectiveness and reliability of the University? Below you will find more information about our financial policy.

Giliam de Valk is an Assistant Professor at the Institute of Security and Global Affairs. He is specialized in methodology of intelligence analysis. He wrote his PhD on the Quality of Intelligence Analysis [2005] and is currently focusing on the methodology on how not to miss threats.