Robin Geiss (born November 8, 1974) is a German academic specializing in public international law.

[3] He has been a scholar of the German Academic Scholarship Foundation (Studienstiftung) and the recipient of a Marie Curie Postdoctoral Fellowship.

[3] He is the founding Director of the Erasmus Mundus Programme in International Law of Global Security, Peace and Development.

[2] Other academic appointments have included visiting professor at the University of Vienna (2017), Professor of Public International and European Law at the University of Potsdam (2011–2013) and Visiting Fellow at the German Institute for International and Security Affairs (SWP) in Berlin (2016), and from 2014 to 2017 Geiss served as Research Project Director for the Collaborative Research Center “Governance in Areas of Limited Statehood” (SFB 700) at the Freie Universität Berlin.

He is an ex officio member of the United Nations Secretary General's advisory board on Disarmament Matters.