2007- now, Assoc Chair (Research), since 2020; Professor (since 2017); Assoc Professor (2007-2017); Programme Director (Special Projects), 2019; Assoc Chair (Graduate Studies), 2013-2014; School of Computer Science and Engineering, Nanyang Technological University, Singapore
2001-2007, Project Leader, Video Quality Metrics; Lab Head, Visual Processing; Acting Dept. Manager, Media Processing; Institute for Infocomm Research, Singapore
1996-2001, Project Leader, Digital Media; Business Development Leader; System-on-Chip Dept., Institute of Microelectronics (IME), Singapore
1993-1995, Research Scientist, Dept. of Electrical Engineering, National University of Singapore
1992-1993, Research Officer, School of Electrical Engineering, Bath University, UK
1986-1988, Lecturer, Dept. of Computer Science & Infomation Engineering, Shantou University, China
1985-1986, Assistant Lecturer, Dept. of Electronics, Sun Yat-Sen (Zhongshan) University, China
1989-1992, Teaching Assistant, Dept. of Electrical Eng., King's College, University of London, UK