Dr Yeng completed his Master of Dental Science from The University of Liverpool in England and his Doctor of Clinical Dentistry in Endodontics from The University of Melbourne. He was also awarded the Fellowship in Dental Surgery from The Royal College of Physicians and Surgeons Glasgow. Following completion of his specialist training from Melbourne, Thai returned to Sydney to work as a specialist. Dr Yeng is a specialist endodontist with around 15 years work experience since becoming a dentist and has previously worked in Singapore and England before returning to Australia in 2003. Thai was previously teaching as a clinical educator at The University of Sydney, Faculty of Dentistry, a Staff Specialist Endodontist at Westmead Hospital and an examiner for The Australian Dental Council.