JP is an Associate Professor of Biostatistics in the Department of Biostatistics at the Harvard T.H. Chan School of Public Health. He is also the director of the school's Health Data Science master's degree program. His research focuses on statistical network science and digital phenotyping methods. JP did postdoctoral training at Harvard and Oxford, and received his doctorate at the Helsinki University of Technology. In 2013, he was awarded an NIH Director’s New Innovator Award.