Greg’s expertise is in international law with research interests in its applications to counter-terrorism and to environmental protection. He teaches across these areas and Administrative Law.
His research in the area of environmental protection addresses mechanisms for the effective implementation of international environmental standards. In relation to counterterrorism, Greg is currently researching the laws of armed conflict in their application to non-State actors engaged in political violence at the level of hostilities.
Greg is an Associate Editor of the Yearbook of International Environmental Law and is a member of the Editorial Board (previously Editor-in-Chief) of the Review of European Community and International Environmental Law (RECIEL).