Ir. Ts. Dr. Liew Peng Yen received his Doctor of Philosophy (Ph.D.) and Bachelor of Engineering (B.Eng.) from Universiti Teknologi Malaysia (UTM) in Chemical Engineering. He has qualified himself as the Professional Engineer by Board of Engineers Malaysia (BEM), Chartered Engineer under Engineering Council (UK), chartered member of Institution of Chemical Engineers (IChemE), and certified energy manager (CEM) under ASEAN Energy Manager Accreditation Scheme (AEMAS). He specialises in energy management and Process Systems Engineering with emphasis on industrial energy and resources conservation using systematic algebraic process integration techniques. To date, he has authored 56 indexed journals and refereed conference proceedings on his research work, and delivered keynote (5) invited lectures in several international conferences. His current citation is 630 and H-index of 12 as recorded in Scopus. He received Highly Commended in IChemE Malaysia Young Researcher Award 2017 and 2019.