Menu Menu

Team Members

  • Dr Christian Marxsen

    Christian Marxsen leads the Max Planck Research Group “Shades of Illegality in International Peace and Security Law”. He is co-editor of the Cambridge University Press book series Max Planck Trialogues on the Law of Peace and war and has taught international law in Heidelberg, Beijing and Santiago de Chile.

  • Dr Erin Pobjie

    Erin Pobjie is a Senior Research Fellow in the Shades project. In her post-doctoral project, she researches the relationship between state behaviour and the international law on the use of force. Prior to joining the research group, she was a research fellow at the Institute for International Peace and Security Law in Cologne, and a visiting scholar at the Lauterpacht Centre for International Law at the University of Cambridge.

  • Alexander Wentker

    Alexander Wentker is a doctoral researcher in international law at MPIL. He completed his First State Examination in law in Berlin (Humboldt-Universität) and holds master’s degrees in law from the universities of Oxford and Paris II. Prior to joining the research group, Alexander clerked at the Supreme Court of Namibia and interned, inter alia, with the UN Office for the Coordination of Humanitarian Affairs in New York.


  • Florian Kriener

    Florian Kriener graduated from the Law Faculty of the University of Heidelberg in 2019 and is a Research Fellow at MPIL. In his research he focusses on the Principle of Non-Intervention and its interplay with support to international protest movements.

  • Felix Herbert

    Felix Herbert is a student research assistant to the SHADES project. He studies Law with a focus on Public International Law. As a participant in the Jessup International Law Moot Court Competition in 2018, he gained some further insight into public international law and consolidated his particular interest therein.

  • Paula Anna Jenner

    Paula Anna Jenner has been a law student at the University of Heidelberg since October 2015. Through her participation in the 2018 Jessup Moot Court, she gained first impressions of International Law. Having developed a particular curiosity for Public International Law, she joined the SHADES project.