Dr. Md Raisul Islam was awarded a research scholarship by the National University of Singapore (NUS) in 1998 to undertake a research project on the heat and mass transfer processes of air conditioning systems and was awarded a PhD degree in 2003. After completing his PhD, he continued his research and teaching initially at NUS and later at Curtin University, Malaysia. In 2008 he joined as a Technical Director of LJ Energy Pte Ltd. His main role was to lead a team of Engineers in the energy audit and energy retrofit of major energy consuming systems such as Chiller, Boiler, Compressed air, and Combined Heat and Power (CHP) systems used in industries, commercial buildings, hotels, hospitals and retail malls. He was also involved in teaching several Engineering Professional courses such as (1) Singapore Certified Energy Manager (Professional level), (2) Green Mark Facilities Manager, and (3) Energy Management Programme for Public Sector’s Facilities Managers administrated by the National Environment Agency (NEA). He is a Chartered Engineer. His professional qualifications include Singapore Certified Energy Manager (SCEM), Energy Efficiency Opportunities Assessor (EEOA), Qualified Energy Services Specialist (QuESS), BCA Registered Energy Auditor, Green Mark Professional, Green Mark Facility Manager, Leadership in Energy and Environmental Design – Accredited Professional (LEED AP, USA), and Green Building Index Facilitator (GBIF). Presently, as an Associate Professor in the Mechanical Engineering Department of NUS, he is continuing his teaching and research on energy systems.