Dr. Joëlle Oosterman is a medical doctor and medical biologist. She worked as a physician at the Netherlands Obesity Clinic and as a resident at the department of Internal Medicine before she started working as a scientist at TNO Healthy Living. During her PhD (2017, AMC Amsterdam) she assessed the effects of timing of food intake on metabolism and the clock. At TNO, she is involved in a variety of studies focusing on lifestyle as medicine. She believes that focus on the internal clock should be one of the pillars of a healthy lifestyle.