 CTRI links public health, medical and health administration schools and departments at CGU, UC Riverside, Loma Linda University, and the University of La Verne with public health, health care and other community based institutions in Southern California, including the County of Riverside, the Inland Empire Health Plan, and municipalities, school systems and NGO's in the region for translating health promotion and disease prevention science into public policy and practice.His teaching in population health and prevention science at CGU links faculty and students with the practice of translational research.Prior to his arrival at CGU, Johnson was founding director of the Institute for Health Promotion & Disease Prevention Research (IPR), and Sidney Garfield Professor of Health Sciences and Professor of Preventive Medicine & Psychology at the University of Southern California (USC).