Dr. Oscar John Ma is a highly accomplished medical professional with decades of experience. Throughout his career, he has had many opportunities for research and advancement in medical team leadership at various hospitals. His first role was attending staff with the University of North Carolina Hospitals in Chapel Hill. From there, Dr. Oscar moved into a medical director role with Carolina Air Care. Within one year, he became the director of emergency ultrasonography in the Department of Emergency Medicine and worked as a residency research director.