He is also an International Associate at the Center for Peace and Human Security, Institut d"Études Politiques de Paris. He is the editor-in-chief of the journal Civil Wars. Newman specialises in the study of human security, international organisations and multilateralism, and peacebuilding.
He has written three monographs, The United Nations Secretary-General from the Cold War to the New Era (Macmillan, 1998), A Crisis of Global Institutions? Multilateralism and International Security (Routledge, 2007) and Understanding Civil Wars.
Continuity and Change in Intrastate Conflict (Routledge, 2014), and edited numerous books including Refugees and Forced Displacement: International Security, Human Vulnerability, and the State (co-edited, United Nations University Press, 2003), Challenges to Peacebuilding: Managing Spoilers During Conflict Resolution (co-edited, United Nations University Press, 2006) and New Perspectives on Liberal Peacebuilding (co-edited, United Nations University Press, 2009).