• Full Professor (from May-2005)
• Editorship:
  • Associate Editor, IEEE Trans. on Image Proc. (2007~)
  • Editor, IEEE Trans. on Communications (1997~)
  • Associate Editor, IEEE Trans. on Multimedia (2002~)
  • Editorial Board Member, International Journal on Image and Graphics (2002~)
  • Editorial Board Member, International Journal on Visual Communication and Image Representation (2005~)
  • Editorial Board Member, Research Letters in Signal Processing, Hindawi Publishing Corporation (2007~).

• Deputy Director, Centre for Signal Processing (2002~30 June 2007)
• Programme Director, Master of Science (Signal Processing) (2002-31 August 2006)
• Associate Professor ( 1 Jan 1999 – 30 April 2005 ), Nanyang Technological University.
• Senior Lecturer ( 1 Jan 1997 - 31 Dec 1998 ), Nanyang Technological University.
• Lecturer ( 1 Mar 1995 - 31 Dec 1996 ), Nanyang Technological University
• Member of Technical Staff (Jul 1992 - 28 Feb 1995), Institute of Microelectronics (then under Department of Electrical Engineering, National University of Singapore .) Conducting research on digital video compression and MPEG standards.
• Research & Development Engineer (Sep 1984 - May 1992), IBM Corporation, Kingston , New York and Research Triangle Park , North Carolina , USA . Conducting advanced product development for multimedia signal processing applications using IBM proprietary digital signal processor (called MWave® ).