Michael D. Lewis, MD, MPH, MBA, FACPM, FACN, is a proven leader and expert in brain health, concussions, and traumatic brain injuries (TBI) as well as a recognized innovator in infectious disease surveillance and epidemiology. Upon retiring as a Colonel in the U.S. Army, he founded the nonprofit Brain Health Education and Research Institute and entered private practice focusing on helping patients with chronic concussion issues. His pioneering work in the military and since has helped thousands of people around the world and he is regularly featured in the media, radio, podcasts, webinars, scientific conferences, and television including CNN’s Sanjay Gupta MD show, Fox News, C-SPAN, and more. A lifelong athlete, Dr. Lewis serves on the Pop Warner Youth Football Medical Advisory Board and Board of Directors of National Collegiate Rugby where he is also the head of the Medical and Safety Committee. Dr. Lewis is the author of When Brains Collide: What every athlete and parent should know about the prevention and treatment of concussions and head injuries. Dr. Lewis is a graduate of the U.S. Military Academy at West Point, Tulane University School of Medicine, and Johns Hopkins University School of Hygiene. He is board-certified and a Fellow of the American College of Preventive Medicine and American College of Nutrition. He completed post-graduate training at Walter Reed Army Medical Center, Johns Hopkins University, and Walter Reed Army Institute of Research.