Adesegun Olayiwola FATUSI, is a Fellow of the West African College of Physicians in Community Health, and Professor of Public Health and Community. He worked previously as a Reproductive Health Adviser for the United Nations Population Fund (UNFPA)’s programme in Nigeria (1996-2001) and as Director of International Research at the Guttmacher Institute, New York, USA (2019-2020). Within the University system, he had previously served as the Head of Community Health Department, the Director of Population and Reproductive Health Programme, the Director of the Institute of Public Health, and Provost of the College of Health Sciences, Obafemi Awolowo University, Ile-Ife. Among others, he holds the International Master of Public Health degree from the Hebrew University, Hadassah, Israel (with summa cum laude honours), and is a 2001/2002 Packard-Gates Leadership Fellow at the University of Washington, USA. He also has a PhD Degree in Public Health from the University of Ibadan and Doctor of Medicine degree from the National Postgraduate Medical College of Nigeria. He is a Fellow of the Nigerian Academy of Medicine, and Nigerian Academy of Science. He is currently rounding up his tenure as the Vice Chancellor of the University of Medical Sciences, Ondo – Nigeria’s first specialized medical and health sciences university. He is a leading expert in Adolescent Health and Development; Sexual, Reproductive, and Maternal Health; and, Health Policy. He is actively engaged in research, training, programme management and policy development at international, national, and sub-national levels. He has led several national research initiatives including the National Study on School Health, Performance Factor Special Study on Reproductive and Child Health, and the National AIDS & Reproductive Health Survey. He has also served as the Nigerian Principal Investigator for several international studies, including the Learning-Plus Initiative (on HIV and school health), the formative research for the Global Accelerated Action for the Health of Adolescents (AA-HA!), and the Global Early Adolescent Study. Furthermore, he has served as the lead consultant for the development of several policy-related documents and strategic plans, including those on adolescent health, HIV/AIDS, reproductive and maternal health, and youth development in Nigeria and beyond. He has served as a consultant to several government agencies as well as international development organisations, including WHO, UNFPA, UNICEF, UNDP, UNAIDS, World Bank, USAID and CDC-funded programmes, and DfID-funded projects. He is currently the Chair of Nigeria’s National Adolescent Health & Development Technical Working Group, the President of the Society for Adolescent and Young People’s Health in Nigeria (SAYPHIN), and member of the Reproductive, Maternal, Newborn, Child and Adolescent Health Technical Advisory Group (TAG) for the African Regional Office of the World Health Organization, He formerly served as the Vice President (Sub-Saharan Africa) for the International Association for Adolescent Health (IAAH), and a member of the Lancet Commission on Adolescent Health and Wellbeing.