In 2010 Williams was appointed to the faculty at the University of Texas Southwestern Medical Center, where he was eventually promoted to Associate Professor. Williams led the trauma team who responded to the 2016 shooting of Dallas police officers; a national tragedy whereby five police officers were shot at a march against police brutality. He has said that it was this moment that made him aware of the intersection of racism, gun violence and healthcare. The Mayor of Dallas, Mike Rawlings, named Williams chairman of the Dallas Police Citizens Review Board. Williams since has since launched the podcast "Race, Violence &amp; Medicine".