Currently, Dr. Cao is the Director of Cardiac Electrophysiology Laboratory, Associate Medical Director of Cardiac Research, Director of the Stress Testing Laboratory, and Director of the EKG Laboratory at LA County/USC Medical Center and previously was the Chief of Cardiology, Director of Cardiac Catheterization Laboratory, and Director of the Pacemaker/Internal Cardiac Defibrillator (ICD) Services at David Grant Medical Center. At LA County/USC Medical Center, Dr. Cao has actively been involved in state of the art research. In addition, Dr. Cao is considered an expert on cardiac medical devices and arrhythmias where he has been an invited presenter both nationally and internationally.