Universiteit Leiden

nl en

Mark Klaassen

Assistant Professor

Dr. M.A.K. Klaassen
+31 71 527 7420

Dr Mark Klaassen is Assistant Professor at the Institute of Immigration Law, Leiden Law School, Leiden University. He graduated from Warwick University with a Master of Arts in Politics in 2008 and progressed to an LLM in European law at Leiden University where he graduated cum laude. After his studies, he worked at the secretariat of the Advisory Committee on Migration Affairs as a policy advisor. In 2012, he started his doctoral research on the right to family reunification at the Institute of Immigration Law, Leiden Law School and obtained his PhD degree in 2015.

Klaassen is currently a lecturer and coordinator of various courses related to immigration law at Leiden Law School. In 2018, he was appointed as a member on the Advisory Committee on Migration Affairs, an advisory body for the Dutch government and parliament on immigration law and policy. He regularly teaches on post-academic courses for professionals working in the field of immigration law. Klaassen is also a board member of the Dutch Association for Migration Research and a member of WorldConnectors, a cross-generational network of opinion leaders that aims to develop new strategies and visions on international issues.


An important focus of Klaassen’s research is the role of human rights and children’s rights in international, European and Dutch immigration law. In his doctoral dissertation, he analysed the right to family unification. His other research interests are the protection of the rights of unaccompanied minors, the free movement of persons in the EU and  protection against refoulement of children fearing female genital mutilation.


Klaassen teaches in the following courses at Leiden Law School

Besides these courses, Klaassen also supervises master theses in the LLM programmes Child Law, Constitutional and Administrative Law and Public International Law and in the Advanced LLM programmes International Children’s Rights and European and International Human Rights Law.


Assistant Professor

  • Faculteit Rechtsgeleerdheid
  • Instituut voor Publiekrecht
  • Immigratierecht

Work address

Kamerlingh Onnes Building
Steenschuur 25
2311 ES Leiden
Room number C1.02



No relevant ancillary activities

This website uses cookies. More information