Dr. Jenssen is the Associate Director of Clinical Impact at Clinical Futures, a faculty member at PolicyLab, a practicing primary care pediatrician at Children's Hospital of Philadelphia, and medical director of value-based care for CHOP’s Care Network, a primary care network for 260,000 pediatric patients in Pennsylvania and New Jersey.

He maintains an active research program that centers on the use of clinical decision support systems and population health management techniques to protect children from secondhand smoke exposure and tobacco use. In addition, his research involves leveraging health information technology to engineer and implement novel approaches and products to improve care for children and their parents.