O John Ma was a professor and the chair of emergency medicine at Oregon Health & Science University from 2007 to 2019. Between 2011 and 2013, Dr. O John Ma was the President of the Professional Staff at OHSU Healthcare, which is where he worked. CEO and Co-Founder: Dr. O John Ma was the CEO and Co-Founder of Innovative, Disruptive, and Emerging Applications in Emergency Medicine (IDEA-EM). Ma and Mateer's Emergency Ultrasound and Tinitnalli's Emergency Medicine are two of the 20 reference books that Dr. O John Ma has written. They have been translated into more than a half a dozen languages. Dr. O John Ma's research has mostly focused on how ultrasound can be used to find injuries in people who have been hurt. He has been on the boards of directors for the American Board of Emergency Medicine and the Society for Academic Emergency Medicine, both of which he has been on. When he was a teacher, he won four Teacher of the Year awards. In 2005, he won the SAEM Excellence in Ultrasound Education Award.