Khassoum Diallo (PhD) is a statistician/demographer with extensive experience in health systems, statistics, monitoring and evaluation, research and knowledge management. Over the last 25 years, Dr Diallo has provided technical support and capacity building to governmental, NGO and UN experts in more than 50 countries in Africa, Asia, Europe and Latin America. He has occupied various positions in UN agencies (UNICEF, UNHCR, UNFPA and WHO) and Academia in Africa, Northern America and Europe. He is currently Unit Head of the Data, Evidence and Knowledge Management Unit in the Health Workforce Department at WHO Headquarters in charge of the NHWA implementation at global level.