Professor of Pediatrics, Pharmacology, Physiology, Genomics and Precision Medicine at the George Washington University School of Medicine and Health Sciences, Washington, DC
Chair in Pediatric Clinical Pharmacology at Evan and Cindy Jones Endowed
Eckenstein-Geigy Distinguished Professor of Pediatric Pharmacology at the University Children’s Hospital of Basel, University of Basel, Switzerland
President of the American College of Clinical Pharmacology (2016-2018) 
President of the European Society of Developmental, Perinatal and Paediatric Pharmacology (2006-2008 and 2017-2019)