Calvin J. Chiew is a resident in the National Preventive Medicine Residency Program in Singapore. He is currently serving as a clinical epidemiologist at Tan Tock Seng Hospital’s Office of Clinical Epidemiology, Analytics & Knowledge. Previously, he worked as a physician in the local hospitals and primary care clinics, and as a medical officer in the Singapore Armed Forces Medical Corps. He obtained his medical degree from the National University of Singapore and Master of Public Health (concentration in Quantitative Methods) from Harvard University. He has a keen interest in health data science and medical informatics.