This study represents the first randomised controlled study of a resilience training program, based on empirical evidence and designed to inoculate emergency services personnel against job stressors. It has highlighted the fact that the vast majority of police recruits were resilient to exposure to traumatic events. Findings at six-month follow-up indicate that more than half of all participants reported a total substance or alcohol involvement score that was at risk level. This suggests the need for clear, comprehensive and widely known policies and procedures to be put in place to identify and support those with either substance or alcohol use problems Overall, the results of this study provide support for the inclusion of resilience training in the overall training of new-recruit police officers until further, long-term follow-ups suggest otherwise.