Professor Hestermeyer is the chair of international and EU law at the Diplomatische Akademie Wien – Vienna School of International Studies. Holger has joined the DA Vienna after nearly a decade in UK academia, first as Shell Reader for International Dispute Resolution, then as Professor of International and EU Law at King’s College London.

He was a founding co-director of KCL’s Centre for International Governance and Dispute Resolution. Holger works in the areas of international, EU and comparative constitutional law. His research has won several awards and grants, amongst them an Otto Hahn Award of the German MPG and a British Academy mid-career fellowship. Holger has served as co-executive Vice President of the Society of International Economic Law and as co-chair of the Interest groups on international courts and tribunals and international economic law of ESIL.

Holger is admitted to the German and the New York bar and advises on international and EU law. He has served as specialist adviser of the House of Lords EU Select Committee and of the House of Lords External Affairs sub-Committee of the EU Select Committee. He has frequently been called upon to give testimony to Parliament. Before joining academia, Holger was a Référendaire at the Court of Justice of the EU.