Mr. Hillary Koros is a Research Officer in the Health Economics Research Unit at KEMRI-Wellcome Trust Programme, Nairobi. He previously worked as a Research Coordinator for Scaling Up the Primary Health Integrated Care for Chronic Conditions in Kenya; an implementation research project. He has participated in several other health research and evaluation studies on Non-communicable Diseases (NCD), health system assessments and Reproductive Maternal Neonatal and Child Health (RMNCH). He has also extensive research experience in mixed methods research and working with policy makers within the health system. His research interests are in Public and environmental health, health systems research with particular interest in service delivery on Maternal and Neonatal Health. Mr. Hillary holds an MSc. In Environmental Biology and a BSc. in Biology from Masinde Muliro University of Science and Technology (MMUST).