To test the efficacy of the 22ZERO Trauma Resiliency Protocol (TR-P) on PTSD symptom severity among current and former law enforcement officers. Uses a retrospective, pre/post intervention design to test the effects of the TR-P on measures of self-reported symptom severity. 128 current and former law enforcement officers were exposed to the TR-P treatment. All participants were administered the PCL-5 PTSD Checklist and other psychological assessments before and after exposure. Participants experienced a significant reduction in symptom severity, suggesting that exposure to the TR-P reduced the effects of PTSD in this sample of law enforcement officers. The 22ZERO Trauma Resiliency Protocol may be an efficacious mechanism for reducing PTSD symptom severity among current and former law enforcement officers. It should be tested using a randomized trial and a longer follow-up period.