Dr. Johannes Tropper is a postdoctoral researcher and lecturer at the Department of European, International and Comparative Law at the University of Vienna.

He studied law and political science at the University of Vienna. He received his PhD in International Law from the University of Vienna with a thesis on ‘Unilateral Promises in General International Law and Investment Law’.

Prior to his current position, he worked as a law clerk at the regional court in St. Pölten, as a researcher and lecturer (prae doc) at the Department of European, International and Comparative Law at the University of Vienna, as an associate editor for the Oxford Reports on International Law in Domestic Courts, as a project researcher for the FWF-funded project 'Rule of Law and International Investment Law', as an assistant at the Austrian Constitutional Court and as a student assistant at the Department of European Law at the University of Vienna.

His research focuses on international dispute settlement, in particular investor-state arbitration, international investment law and unilateral acts in international law.

He is also an alternate member of the ILA Committee on Comparative Diplomatic and Consular Immunities, Privileges and Inviolabilities.