Following his doctoral training at the Pennsylvania State University, he did a postdoctoral fellowship at the Department of Health Care Policy, Harvard Medical School. He previously worked as a statistical advisor at the Institute for Health Policy at the Massachusetts General Hospital and Harvard Medical School. During this time, he was awarded a fellowship by the American Statistical Association and the National Center for Health Statistics to develop and disseminate methods for handling item nonresponse in complex sample surveys. He also taught at the Department of Biostatistics at the University of Massachusetts, Amherst.