Yf Reykers (Y.)

Yf Reykers is Assistant Professor in International Relations (tenured) at the Faculty of Arts and Social Sciences at Maastricht University. He is also Programme Director of the Research Master European Studies. Previously, he was a postdoctoral researcher at the Leuven International and European Studies Institute at KU Leuven, where he also obtained his PhD in 2017. He was a visiting scholar at the Robert Schuman Centre for Advanced Studies at European University Institute, at the Center on International Cooperation at New York University, and at Aarhus University. 

He is currently also Co-Editor of the journal Contemporary Security Policy and co-Principal Investigator of the project “Ad hoc crisis response and international organisations (ADHOCISM)”, which is funded by a grant (2021-2025) from the Research Council of Norway.

Yf studies issues relating to European security and defence. For the moment, he focuses in particular on the crisis response capacities of international organisations, and the European Union in particular. He teaches courses on International Relations and research design in the BA, MA and Research Master European Studies.

His work has been published in, amongst others, Cooperation and Conflict, Contemporary Security Policy, European Security, International Affairs, International Peacekeeping, Journal of European Integration, Parliamentary Affairs and Third World Quarterly. He is co-editor of the volume ‘Multinational Rapid Response Mechanisms: From Institutional Proliferation to Institutional Exploitation’ (2019, Routledge Global Institutions Series).

A full list of publications can be consulted via Pure.

Some recent publications include:

• Maglia, C., Karlsrud, J., & Reykers, Y. (2025). Military Ad Hoc Coalitions and Their Role in International Conflict Management: Insights from the ADHOCISM Dataset. International Peacekeeping. Advance online publication. Link
• Reykers, Y. (2024). Evaluating crisis response speed of international organisations: why it matters and how to achieve it. Journal of European Public Policy. Advance online publication. Link
• Reykers, Y., Rieker, P. (2024). Ad hoc coalitions in European security and defence: symptoms of short-term pragmatism, no more? Journal of European Integration, 1–19. Link
• Reykers, Y., Karlsrud, J., Brosig, M., Hofmann, S., Maglia, C., Rieker, P. (2023). Ad hoc coalitions in global governance: short notice, task- and time-specific cooperation. International Affairs, 99 (2), 727-745. Link
• Reykers, Y., Adriaensen, J. (2023). The Politics of Understaffing International Organisations: The EU Military Planning and Conduct Capability (MPCC). European Security, 32 (4), 519-538. Link
• Meyer, C., van Osch, A.G.D., Reykers, Y. (2022). The EU Rapid Deployment Capacity: This time, it’s for real?, In-Depth Analysis requested by the European Parliament's Committee on Security and Defence. Link