Walter “Buzz” Stewart is a Health2047 Advisor and an internationally-renowned researcher. He has authored more than 400 scientific manuscripts, pioneered understanding of EHR data uses for real world evidence, and created successful academic research programs, start-ups, and healthcare R&D units. With more than 15 years of experience working in a variety of health systems, Buzz has a deep understanding of what matters most to patients, providers, care teams, and operators in the delivery of healthcare. He has worked at all levels of data analytics including pragmatic trials, quasi-experimental design modeling, and use of machine learning for predictive and segmentation modeling. Buzz holds a MPH in Epidemiology from University of California at Los Angeles, and a PhD in Epidemiology from Johns Hopkins Bloomberg School of Public Health.