A specialist in evaluation, post-war needs assessment, food security, internal displacement, rural development, humanitarian relief, and evaluation. He has 35 years’ experience working in Africa and Asia in Field Director, Country Representative and Team Leader posts for the UN and various NGOs, including the UNDP, World Food Programme, Norwegian Refugee Council and Oxfam. He was the founding Director of the Global IDP Project and a member of the international advisory board for the IDP Guiding Principles. From 2004-2005, he was UN Team Leader for the post-war assessment and recovery/development appeal for Sudan, leading a team of 100+ over 15 months. He has been Team Leader for the Tsunami Evaluation Coalition (Coordination study) and has been evaluating DFID, OECD/DAC donors and UN programmes in Indonesia, Southern Africa, Afghanistan, Yemen, North/South Sudan, Ethiopia, and several eastern European countries. In 2010 he led a large multi-donor evaluation of conflict and aid in South Sudan and was the principle author of “Aiding the Peace” that resulted from this. In 2012 he led a thematic evaluation of UNDP’s work in conflict-affected countries. In addition to numerous published reports and journal articles, his published books include Internally Displaced People: a global survey (1998), NGOs and Government (1987), NGO funding strategies: an introduction for Southern and Eastern NGOs (1996), NGO Coordination in practice: a handbook (1994, 1998) and Meeting Needs (1995).