Universiteit Leiden

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Floris Tan

External PhD candidate

Mr. F. Tan
+31 71 527 2727

Floris Tan has been a staff member of the Grotius Centre since 1 September 2015 as a PhD candidate.

More information about Floris Tan

Floris pursued his bachelor studies in Dutch Law and International and European Law at the Radboud University Nijmegen. He subsequently obtained master’s degrees in Dutch Law (with a specialisation in Criminal Law) and International & European Law, graduating cum laude in both, also in Nijmegen. He conducted part of his studies at the University of Sydney in Australia, as part of an exchange programme. Furthermore, Floris did an internship at Amsterdam-based law firm 'Böhler Advocaten' (now: Prakken d'Oliveira Human Rights Lawyers), as well as volunteer work at a legal aid centre (rechtswinkel).

Following his graduation, Floris worked for six months as a junior lecturer at the Willem Pompe Institute, University of Utrecht. During this time he taught tutorial groups in Dutch criminal law and supervised bachelor theses.


The legal obligation to investigate human rights violations in armed conflict: an analysis of the interplay between international humanitarian law and international human rights law.

His research, under supervision of Professor Duffy, Professor Loenen and Dr. Koppe, verges on both international humanitarian law and human rights law, with a focus on the interplay between these bodies of law. It specifically concerns states' duties to investigate violations of the law of war and human rights violations during armed conflict, the central research question focusing on the exact scope and contents of a duty to investigate under the law as it stands, given the lack of clarity regarding the co-application and interplay between human rights and humanitarian law.

In addition, the research aims to answer the normative question what the obligation to investigate ought to entail. Besides the topic of his PhD research, Floris is interested in the tension and potential conflict between human rights and criminal law.

External PhD candidate

  • Faculteit Rechtsgeleerdheid
  • Instituut voor Publiekrecht
  • Grotius Centre for Intern Legal Studies

Work address

Kamerlingh Onnes Building
Steenschuur 25
2311 ES Leiden



No relevant ancillary activities

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