Dr. Keller is a pulmonary and critical care physician at Brigham and Women’s Hospital where he serves as Medical Director of the ECMO mechanical support service and attends on the lung transplant, cardiac surgical, and medical intensive care units. He was previously at the Pittsburgh Medical Center where he was on the faculty and attended on the cardiothoracic, trauma, and medical intensive care units.

Dr. Keller is affiliated faculty at the Harvard-MIT Biomedical Engineering Center where he conducts research on mechanical circulatory support, organ-device interactions, and extracorporeal organ perfusion.