Professor Ir Dr Ong Hwai Chyuan is a Chartered Engineer (CEng) registered with the Engineering Council, UK. His research interests are energy & fuel, biomass energy, sustainable energy, environmental sustainability, circular economy, solar thermal system, and waste management. He is listed as Highly Cited Researcher (Engineering) by Clarivate Analytics in 2019-2022. He also named as Australia top early career researcher in sustainable energy in 2021. Currently, he is Associate Editor of Critical Reviews in Environmental Science and Technology, Alexandria Engineering Journal, and e-Prime. Ong is also Core Group Member of APRU Sustainable Waste Management (SWM) program.