High-altitude medic and future-technology evangelist. Jack Kreindler is a physician and tech entrepreneur, specializing in high altitude physiology and the application of elite sport science to help the sickest patients achieve their goals. In 2007 he founded CHHP (Centre for Health and Human Performance) in Harley Street, renowned for its work with athletes, complex cases and celebrity charity challenges. Jack founded Sentrian (formerly Jointly Health) in 2012. Based in California, Sentrian is pioneering new methods of machine learning using bio-sensors to better manage millions of patients with complex chronic disease, avoiding preventable hospitalizations.