Thom Mayer, MD, serves as medical director for the National Football League Players Association and founded Best Practices Inc. A clinical professor of emergency medicine at George Washington University and senior lecturing fellow at Duke University, he led medical operations during the 9/11 Pentagon attack and has commanded emergency response teams for over three decades. Dr. Mayer speaks at forty to fifty conferences annually on crisis leadership, emergency medicine, and organizational resilience. He was the physician who treated Damar Hamlin during his on-field cardiac arrest and currently trains medical personnel in Ukraine's war zones.