After completing her compulsory medical training , Dr Khoo found her calling in Anaesthesiology. In 1998, she completed her Masters of Anaesthesiology in University of Malaya with distinction and the Patmarajah gold medal. In addition, she is a Fellow with the Australian and New Zealand College of Anaesthetists. She has worked in various hospitals in Malaysia, Australia and UK before being the pioneer anaesthetist at Thomson Hospital Kota Damansara.