Hamidi Abdul Aziz is a professor in environmental engineering in the School of Civil Engineering and the Head of the Solid Waste Management Cluster, Universiti Sains Malaysia. Professor Aziz received his PhD degree in civil engineering (environmental engineering) from the University of Strathclyde in Scotland in 1992. To date, he has published over 200 refereed articles in international journals and proceedings. He is the Editor-in-chief of the International Journal of Scientific Research in Environmental Sciences (IJSRES), and the Managing Editor of the International Journal of Environment and Waste Management (IJEWM) and International Journal of Environment and Waste Management (IJEE). Professor Aziz’s research focuses on alleviating problems associated with water pollution issues from industrial wastewater discharges and from solid waste management via landfilling, such as landfill leachate. Advanced oxidation processes is one of his research focuses. He also has strong interest in biodegradation and bioremediation of oil spills.