Dr Priscilla Sia graduated from the National University of Singapore with a Bachelor of Dental Surgery in 2009. After graduation, she worked at the National Dental Centre and NHG Health Polyclinics before joining Khoo Teck Puat Hospital. In 2015, she obtained her Certificate in Prosthodontics and Master of Science from the University of Maryland, Baltimore, USA. She is a Diplomate of the American Board of Prosthodontics.

Dr Sia is currently a Consultant in Prosthodontics at Khoo Teck Puat Hospital and a Clinical Lecturer at the National University of Singapore Faculty of Dentistry.​