Dr. O John Ma was Professor and Chair of Emergency Medicine at Oregon Health & Science University from 2007 until 2019. Dr. O John Ma was President of the Professional Staff at OHSU Healthcare from 2011 to 2013. Dr. O John Ma was the CEO and Co-Founder of Innovative, Disruptive, Emerging Applications in Emergency Medicine (IDEA-EM). Dr. O John Ma has edited 20 reference textbooks, including Ma and Mateer's Emergency Ultrasound and Tinitnalli's Emergency Medicine, which have been translated into more than 10 languages. The majority of Dr. O John Ma's research has centered on the use of ultrasonography in the identification of injuries in trauma patients. He has served on the boards of directors of the American Board of Emergency Medicine and the Society for Academic Emergency Medicine. He holds four Teacher of the Year honors and the SAEM Excellence in Ultrasound Education Award, which he got in 2005.