Ronenn trained in internal medicine, epidemiology, and rheumatology at Johns Hopkins, and did postdoctoral training in inflammation and nutrition at Tufts University. He is currently Global Head of Translational Medicine Discovery and Profiling at Novartis Institutes for Biomedical Research (NIBR), based in Basel, Switzerland. He is also Adjunct Professor of Medicine and Nutrition at Tufts. He is an internationally recognized authority on sarcopenia, translational medicine, and the use of biomarkers in drug development.