The 4th postgraduate colloquium was participated by LKC FES postgraduate students from five research areas, namely: Applied Engineering; Applied Mathematics, Simulation & Computing; Health Science & Technology; Green Technology & Sustainable Development; and Energy, Project & Intelligent Management. The purpose of the colloquium is mainly to provide a platform for the postgraduate students in Lee Kong Chian Faculty of Engineering and Science (LKC FES) to present their recent works or findings in their fields of research. In addition, this event also serves as a platform for postgraduate students and academic staff of LKC FES to exchange ideas and gather feedback on their research works. Keynote speakers for this colloquium are: 1. Prof Dr Zhou Jinyuan, Professor, Department of Radiology, Johns Hopkins University School of Medicine, USA 2. Prof Dr Chong Kok Keong, Professor, Department of Electrical and Electronic Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Malaysia 3. Prof Ts Dr Yau Kok Lim, Professor, Department of Internet Engineering and Computer Science, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Malaysia 4. Dr Steven Lim, Assistant Professor, Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Malaysia