Johann Ruben Leiss

Doctoral Research Fellow - Department of Private Law
Image of Johann Ruben Leiss
Norwegian version of this page
Phone +47-22859619
Visiting address Karl Johans gate 47 Domus Media Vest 0162 Oslo
Postal address Postboks 6706 St. Olavs plass 0130 OSLO
Other affiliations Faculty of Law (Student)

Research interests

  • Public International Law
  • International Courts and Tribunals
  • European Law
  • Constitutional Law
  • Comparative Law



Johann Ruben Leiss was born in 1984. He graduated from the Faculty of Law at the University of Göttingen in 2011. Leiss worked as a Research assistant at the Göttingen Institute of Public International and European Law, Chair of Prof. Andreas L. Paulus (Judge at the German Federal Constitutional Court) and for the Joint Project “German Precursors to International Constitutionalism” between the Hebrew University (Jerusalem) and the University of Göttingen. In 2011/2012 he studied at the European University Institute in Florence (EUI) and obtained a Master in Comparative, European and International Laws. From 2012 – 2014 Leiss did his Referendariat (practical legal education) at the Kammergericht in Berlin. During his Referendariat he worked inter alia for the Law Firm Redeker/Sellner/Dahs, the German Foreign Ministry and the German Federal Constitutional Court. In 2014 he obtained the German second state examination. Leiss was appointed a position as a Research Fellow at the Department of Private Law, University of Oslo, in October 2014.

He was a Visiting Research Fellow at the Lauterpacht Centre for International Law, University of Cambridge (UK), and Visiting Research Scholar at Jesus College.


Positions held

Member PhD council (Stipendiatrådet) (october 2014-october 2015)

Organization of conferences and seminars




Tags: Public International Law, International Dispute Settlement, International Courts and Tribunals, legal theory, Human Rights, Comparative Law, Private international law, Constitutional Law, European Law


  • Andenæs, Mads & Leiss, Johann Ruben (2016). Article 38(1)(d) ICJ Statute and the Principle of Systemic Institutional Integration. Social Science Research Network.  ISSN 1556-5068.
  • Leiss, Johann Ruben (2015). One Court, Two Voices: Case Note on the First Senate’s Order on the Ban on Headscarves for Teachers from 27 January 2015: Case No. 1 BvR 471/10, 1 BvR 1181/10. German Law Journal.  ISSN 2071-8322.  16(4), s 901- 916

View all works in Cristin

  • Leiss, Johann Ruben (2015). Towards an Integrated, Predictable and Coherent International Legal System: A Defence of Proportionality Balancing. Voelkerrechtsblog.

View all works in Cristin

Published Oct. 28, 2014 10:54 AM - Last modified Aug. 13, 2018 11:08 AM