Von Hofmannsthal Professor of Law at the Hebrew University of Jerusalem (Department of International Relation and Law Faculty) and Co-director of the International Law Forum at the Hebrew University Law Faculty. His PhD dissertation on the responsibility of international organizations and he specializes in public international law, international legal theory, and international economic law. He co-organizes a series of international workshops on the sociology of international law. A significant part of his publications involves interdisciplinary research that employs, inter alia, sociological theories, game theory, political economy and international relations theory.

His publications include, The "Responsibility of International Organizations Toward Third Parties" (Kluwer-Nijhoff Publishers, 1995), "Invitation to the Sociology of International Law" (Oxford University Press, 2015); "Explaining Compliance and Non-Compliance with ICSID Awards: a Multiple Theoretical Approach" (Journal of International Economic Law, 2016); “African Countries in the World Trading System” (co-author, International & Comparative Law Quarterly, 2012); and "Interactions between Investment and Non-Investment Obligations in International Investment Law", in Oxford Handbook of International Law on Foreign Investment (Oxford University Press, 2008).

In addition to lecturing at the Hebrew University, Prof. Hirsch taught numerous courses on international economic law and international legal theory in other academic institutions (including in London, Toronto, Dundee, Berlin Oñati, New York, Zurich, Vancouver, and Macau).