Prof. T M Indra Mahlia is a professor of Department of Mechanical Engineering, in Universiti Tenaga Nasional, Malaysia. Professor Mahlia obtained B. Eng in Mechanical Engineering from Syiah Kuala University, Banda Aceh, Indonesia. He pursued M. Eng. Sc and PhD at the University of Malaya and graduated in 1997 and 2003 respectively. His publications include more than 300 journal articles, proceedings and also research reports, which 165 are ISI and more than 200 are Scopus indexed. His H-index is 35, with total citation of more than 4000. He supervised 12 PhDs and more than 50 Master students. He also involved as a researcher in 4.2 US$ Million project funded by various sources. Prof. T M Indra Mahlia research interest includes in Energy Engineering, Energy and Environment, Energy Systems and Energy Policy.