Ingo is Professor of International Law and Social Justice at the University of Amsterdam and Director of the Amsterdam Center for International Law (ACIL). In the past, he served, inter alia, as Hauser Research Scholar at New York University and Research Fellow at the Max Planck Institute for Comparative Public Law and International Law in Heidelberg. His work focuses on different dimensions of sustainability as well as the theory and practice of interpretation in international law. His recent attention goes to critical moments in the history of international law and the role of international law in creating the conditions for social (in)justice. His monographs include How Interpretation Makes International Law: On Semantic Change and Normative Twists (2012) and In Whose Name? A Public Law Theory of International Adjudication (together with Armin von Bogdandy, 2014). Recently he edited Contingency in International Law: On the Possibilities of Different Legal Histories (together with Kevin Jon Heller, 2021).

At THE NEW INSTITUTE Ingo was involved in the program "The Future of Democracy".