is currently working as Associate Professor at the Higher Institution Centre of Excellence (HICoE), UM Power Energy Dedicated Advanced Centre (UMPEDAC), University of Malaya, Malaysia. He was listed among the World's Top 2% Scientists for the year of 2021 and 2020. He holds a PhD from University of Malaya, Malaysia. He is an Associate Editor of the Alexandria Engineering Journal, Elsevier; Associate Editor in Chief of the International Journal of Renewable Energy Resources; and has been a Guest Editor for Renewable Energy, Elsevier. He is an editor and author of the book Energy for Sustainable Development published by Elsevier. His research interests include thermal engineering, renewable energy, energy and buildings, energy policy, transport, and electric vehicles. He received a University of Malaya Excellence Award 2012 for his outstanding achievement in PhD; Bangladesh Scholarship Council and the Nippon Foundation, Japan, 2003-2004.