Chas has two decades of practical and academic experience of reconstruction and humanitarian response in conflict and disaster situations. He worked for many years with humanitarian NGOs in East Africa and South Asia. He has undertaken research, projects and consultancies for a wide range of funders: various UN agencies, DFID, ECHO, USAID, European Commission, International Institute for Environment and Development, Disasters Emergency Committee, Global Challenges Research Fund and UK Research Councils, among others. His PhD examined local actors and domestic responses to civil conflict and disaster. His main research interests are civil society and communities in conflict and disaster, humanitarianism, extremism, conflict legacies, disaster response and conflict prevention. Recent research fieldwork has been in civilian protection in South Sudan, post-cyclone Zimbabwe, and post-earthquake community reconstruction in Nepal. He gives training for a variety of audiences on civilian protection, peacebuilding, conflict, humanitarianism and reconstruction.