John Harris is a venture capital investor at Jazz Venture Partners who previously founded multiple breakthrough medical device companies, including Heartstream (which created the external defibrillators now found in airports and public buildings worldwide), Northstar Neuroscience (which went public then was acquired by St. Jude Medical), and NeuroVista (pioneering epilepsy monitoring technologies). He focuses his investments on neuroscience, behavior change, and human performance technologies that can scale into everyday environments and impact large populations, bringing both deep founder experience and hands-on board leadership to companies developing technically sophisticated platforms that augment human capability or safety.