Graduated University of Singapore in 1982
Attended Naval Diving Unit Republic of Singapore
Attended National Service from 1983 to 1984 (treating ENT diving related problems)
Became a Singapore Ministry of Health ENT Trainee in 1985
Trained at Singapore General Hospital (largest hospital in Singapore) from 1985-1989
Completed ENT Traineeship in 1989, obtained ENT Surgical Fellowship from Glasgow
1989 to 1993 Managed skull base conditions along with neurologists and neurosurgeons at Tan Tock Seng Hospital (2nd largest hospital in Singapore), and sinus & nasal problems with the chest physicians & rheumatologists
Awarded the ENT Rhinology (nose & sinus conditions) Ministry of Health S’pore
Training Fellowship in London in 1993. Subspecialized in endoscopic sinus surgery & surgery of the anterior skull base.

Studied under renowned skull base surgeon, Dr. Anthony Chessman, at Royal National ENT Institute, London & renowned endoscopic sinus surgeon, Dr Ian Mackay, at the Charing Cross & Brompton Hospitals, in London. Trained in open approaches & minimally invasive techniques of anterior skull base surgery & in functional and aesthetic nose surgery.

Appointed Head of Tan Tock Seng Hospital ENT Department from 1995 to 1998

Developed successful programs in Rhinology, Laryngology & Audiology, for the hospital.

Opened private practice in 1998 at Mount Elizabeth Medical Center & Hospital (largest private practice medical facility in Singapore).

Appointed Visiting Consultant ENT Services, Alexander Hospital w.e.f. 15th July 2006.

A.B. John ENT Clinic and Surgery

A.B. John ENT Clinic and Surgery

Ear Infection Treatment

ENT Specialist Consultation

Hearing Test

Otosclerosis Treatment

Salivary Gland Removal

Septoplasty

Sinus Surgery

FESS - Functional Endoscopic Sinus Surgery

Sleep Apnea