Geoff holds a PhD from the Vrije Universiteit Amsterdam and a JD from Columbia Law School. His PhD dissertation addressed issues of cosmopolitanism in international law, at the intersection of legal and political theory. His work since has maintained a steady progression towards critical grounding in socio-legal issues and methods. Current work explores ideological dimensions and distributive consequences of universalistic claims in international legal practice. His research into legal practices includes attention to material and technological aspects of international law in institutional contexts, and maintains a parallel focus on considerations of knowledge production. Geoff’s prior experience in interdisciplinary research and teaching includes his tenure as co-director of the Law & Politics of International Security master’s program at the Vrije Universiteit, combining the studies of international law and international relations in the area of international security. He has likewise developed novel courses, including a high-level master’s seminar in Politics of International Law. Geoff has formerly practiced in Amsterdam and New York City, where he also clerked for the Federal District Court. He is currently editor for the International Legal Theory section of the Leiden Journal of International Law.