D. Kacy Cullen, PhD, is an associate professor of neurosurgery and bioengineering at the University of Pennsylvania (Penn) and the Philadelphia VA Medical Center. He received a PhD in biomedical engineering from the Georgia Institute of Technology, followed by postdoctoral fellowships in neuroengineering at Georgia Tech and at the Center for Brain Injury and Repair at Penn. Dr. Cullen’s research program operates at the intersection of neural engineering, neurotrauma and regenerative medicine. He is a leader in the field of tissue engineering, having pioneered novel three-dimensional “living scaffolds” for studies of neuroregeneration, micro-tissue engineering to restore brain circuitry, and “biohybrid” neuroprosthetic interfaces. He is currently a member of the Biomedical Engineering Society, the American Society of Mechanical Engineers, the National Neurotrauma Society and the Society for Neuroscience. Dr. Cullen has published over 110 scientific journals articles and serves on the editorial board of Critical Reviews in Biomedical Engineering.