Dr. Mohammad Rehan graduated with BEng (Hons) in Chemical Engineering from the University of Bradford, UK, in 2003. He then served for a year at the UK Environment Agency. He completed his PhD at the School of Process, Environmental and Materials Engineering, sponsored by EPSRC, the University of Leeds, UK, in 2012. Dr. Rehan then worked as a Postdoctoral Research Associate for 2 years on several projects at the University of Leeds, UK, in collaboration with multinational industries including Procter & Gamble. He has extensive research, teaching and project management experience of more than 15 years. He has co-supervised several PhD and MSc students at Leeds University and King Abdulaziz University. Dr. Rehan has been working as an Associate Professor and Head of Solid Waste Management Group at the Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia, since 2014. He was ranked in the top 2% of Scientists Worldwide in Energy and Environment by Stanford University in 2019, USA.