Humboldt-Universität zu Berlin - DynamInt

Leon Theimer



Research Project:

Civil and commercial matters. The scope and limits of European Private International Law



Legal studies at Ruprecht Karl University of Heidelberg (First Legal State Exam) and University of Oxford (Visiting Student) from 2014 to 2021, supported by the Studienstiftung des deutschen Volkes (German Academic Scholarship Foundation). 

Participant in the Willem C. Vis International Commercial Arbitration Moot 2015/2016 in Vienna and Hongkong. Student Research Assistant to Prof. Dr. Dr. h.c. Thomas Pfeiffer at the Institute for Comparative Law, Conflict of Laws and International Business Law of the University of Heidelberg. 

Specialisation in Private International Law and International Civil Procedure. Subsequently Graduate Research Assistant in the Controversy Team of Skadden Arps Meagher & Flom LLP in Frankfurt am Main. 

Postgraduate studies in law at the University of Oxford (Magister Juris) from 2021 to 2022, supported by the Studienstiftung des deutschen Volkes (German Academic Scholarship Foundation) and the Oxford Law Faculty. 

Since 2022, PhD Candidate at Humboldt-University of Berlin with Prof. Dr. Giesela Rühl, LL.M. (Berkeley) and Research Fellow at the DFG-Graduate College "Dynamic Integration.                    

Participation in the Hague Academy of International Law’s summer course 2023 on Private International Law and recipient of the Academy’s Diploma.


Research Interests

  • Private International Law, including International Civil Procedure
  • Private Law
  • Comparative Law
  • Alternative Dispute Resolution
  • The Law of Climate Change



  • Ein Jahrhundert Haager Akademie: Internationales Privatrecht in einer komplexen Welt, Praxis des Internationalen Privat- und Verfahrensrechts (IPRax) 2024, issue 2, 167-168 (co-authored with Nicolas Dewitte) 
  • When the dust has settled: A negotiation theory analysis of the Brexit negotiations, Zeitschrift für Konfliktmanagement 2024, issue 1, 23-28
  • Protection against the breach of choice of court agreements: A comparative analysis of remedies in English and German courts, 19 Journal of Private International Law 2023, 208-237 (available via Open Access)
  • The End of Consumer Protection in the U.S.? Mandatory Arbitration and Class Action Waivers, 83 The Rabel Journal of Comparative and International Private Law 2019, 841-874 (available Open Access)