Andrew Dennis, D.O., FACOS, is an attending surgeon at the Cook County Trauma and Burn Units in Chicago, Illinois. He is the chairman of the Department of Surgery at Midwestern University, Chicago College of Osteopathic Medicine, and holds a faculty position at Rush University as an assistant professor of surgery. He is board certified in general surgery and critical care.<br /><br />Dr. Dennis has also served in law enforcement and emergency medical services for more than 20 years. He is a sworn law enforcement officer, medical director, team surgeon and tactical emergency medical support provider for both the Cook County<br />Sheriff’s Office and the Northern Illinois Police Alarm System Emergency Services Team. Dr. Dennis is extremely active as both a law enforcement officer and trauma surgeon and is a veteran in dealing with life-threatening situations both in the hospital and out in the street.<br /><br />He founded Medical Tactics, a consulting and training company in Chicago, based on a simple but powerful mission: Empower to survive, train to prevail. The company is dedicated to teaching life-saving medical tactics to law enforcement officers and public safety specialists for use in responding to traumatic injury in the street.