He is one of the leading pioneers in the design and development of renewable energy programmes in Sierra Leone. He holds a BSc Degree in Physics from the University of Sierra Leone, MSc degree in Renewable Energy Technologies from Carl von Ossietzky University in Germany, a PhD degree in Biological Engineering (with specialization in Bioenergy Systems) from Dalhousie University in Canada and a one-year experience as a postdoctoral researcher in Chemical Engineering at the University of British Columbia in Canada among other qualifications. He has taught and conducted research in a range of renewable energy engineering related disciplines and supervised many undergraduate and postgraduate student projects which have resulted in prototypes and public installations especially in the areas of applied technology and renewable energy. In the area of project management, he served as the National Project Coordinator for the United Nations Industrial Development Organization in Sierra Leone with the responsibility of developing renewable energy projects and programmes, covering research, feasibility studies, technology transfer, implementation of turnkey projects, and capacity building. Prof. Mansaray has received several recognitions and awards at national and international levels including a recognition in the coveted global 2023 AD Scientific Index for his passionate contribution to the furtherance of academia, recipient of a University of Sierra Leone award in recognition of his contribution to research, a United Nations award in recognition of his special contribution to the South-South and Triangular Cooperation and a meritorious candidate of the Natural Sciences and Engineering Research Council of Canada. He is a member of the International Association for Solar Energy Education, a member of the Professional Engineers Registration Council of Sierra Leone and a Fellow of the Sierra Leone Institution of Engineers. Prof. Mansaray is currently the Deputy Vice Chancellor of Fourah Bay College, University of Sierra Leone.