- Bachelor of Medicine, Bachelor of Surgery Singapore - May 1994
- Member of the Royal College of Surgeons of Edinburgh June 1999
- Fellow of the Royal College of Surgeons of Edinburgh June 2000
- Master of Medicine (Otorhinolaryngology) March 2001
- Fellow of the Royal College of Surgeons Ireland (Otolaryngology) April 2002
- United States of America Medical Licensing Examination, USMLE July 1998
- Specialists Registration, Accreditation, Otorhinolaryngology May 2004
- Fellow American Academy Otolaryngology Head and Neck Surgery 2005
- Fellow, American Academy of Sleep Medicine 2005
- Member, American Surgical Task Force Committee 2005
- Founding Member, International Surgical Sleep Society (Asia) 2006
- Founder, Asean Sleep Surgical Society March 2008
- Founder, International Sleep Academy March 2009
- Board Member, Italian Sleep Disorders Board 2011
- Member, British Association of Sleep Surgeons 2018 onwards
- Member European Academy of Sleep Medicine 2019 onwards
- Member, Singapore Medical Association 1994 onwards
- Member, Singapore Otolaryngology Society 1998 onwards
- Member, Youth People's Action Party 1994 onwards
- Member, National Cochlear Implant Board Program 1999 - 2003
- Volunteer Doctor, Kim Seng Community Clinic 1994 - 2004
- Commanding Officer, FAST 1 CSH, SAF 2003 onwards
- Clinic Tutor, Medical Student Teaching 1999 onwards
- Member, Malaysian Medical Association 2004 onwards
- Reviewer, American Surgical Modification Task Force 2005 onwards
- Reviewer, Canadian Medical Association Journal 2004 onwards
- Reviewer, Laryngoscope, Otolaryngology Journal 2005 onwards
- Reviewer, Singapore Medical Journal 2006 onwards
- Reviewer, Head and Face Medicine 2006 onwards
- Reviewer, Otolaryngology Head & Neck Surgery 2008 onwards
- Member, American Academy of Sleep Medicine 2005
- Fellow American Academy Otolaryngology Head and Neck Surgery 2005
- Member, American Surgical Task Force Committee 2005
- Organizing Committee, Sleep, Breathing and Surgery II, Sleep Apnea Symposium, June 2006, Chicago, USA.
- Organizing Chairman, Singapore's Sleep Surgery Course, With Prof B Tucker Woodson, Prof David J Terris; 3rd, 4th and 5th Nov 2006
- Organizing Chairman, Singapore's Second Sleep Surgery Course, With Prof B Tucker Woodson, Prof David J Terris; March 2008
- Founding Member, International Surgical Sleep Society (Asia) 2006
- Founder, International Sleep Academy March 2009
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