M. Pierre KLISSOU, Demographer, is Senior Technical Adviser for Democratic Republic of Congo population and housing census. Before DRC, he was successively Assistant Representative of UNFPA Benin Country Office and Senior Technical Adviser for Mauritania population and housing census. With a long experience with united nations agencies, civil society, universities, and public administration, M. KLISSOU works on the capacity building of managers in data collection, analysis and data use for development planning and strategic decision making. Former professor of Demography in Benin National University, Mr KLISSOU holds a Ph. D. in Demography from Catholic University of Louvain-la-neuve, Belgium.