Dr. Jeong received an MD degree in South Korea in 2002. Four years later, he matriculated at Johns Hopkins University and received MPH, MBA and DrPH degrees as a Sommer Scholar from Johns Hopkins Bloomberg School of Public Health and also was selected as a WHO patient safety scholar in 2007. He has been involved in developing and improving patient safety system in South Korea and Canada, and helping hospitals, including Johns Hopkins, design and implement safety programs for years.