Jessica Packer is a Research Assistant at the Great Ormond Street Institute of Child Health. She has a background in Clinical Exercise Physiology, working with chronic disease patients. She then completed a Master’s of Clinical Epidemiology, completing her dissertation on the impact of maternal age on the longitudinal cardiorespiratory fitness of the offspring. She was then chosen to complete an internship at the World Health Organization in the Noncommunicable Diseases and Mental Health Cluster (NMH), working within The United Nations Interagency Task Force (UNIATF) on the Prevention and Control of NCDs. She has also worked as a Research Assistant at the London School of Hygiene and Tropical Medicine in the Department of Non-communicable Disease Epidemiology, assisting with grant applications, design and implementation of pilot studies, conducting a systematic review and quantitative analyses. Jessica's role in the Obesity Policy Research Unit (OPRU) is to assist projects involving emerging methodologies, including systematic reviews utilising machine learning, and applying simulated interventions using causal inference techniques across longitudinal cohort data. She will also assist in the rapid response mode projects, to provide independent research as needed to inform relevant policy and practice decisions.