After graduating from the University of Malaya in 2009, Dr Sim joined the Basic Specialist Training (BST) in Internal Medicine under the Joint Committee on Specialist Training (JCST) and was conferred both the Master of Medicine in Internal Medicine and Membership of the Royal College of Physician (UK) . This was followed by the Cardiology Senior Residency Program from 2013 to 2018 at the National University Heart Centre, Singapore (NUHCS). Dr Sim's research interest are focus on percutaneous coronary intervention, myocardial infarction, aortic stenosis and medication adherence among patients with heart disease.