Emergency services workers face elevated risks of developing mental health conditions, in part due to frequent exposure to potentially traumatic events and also because of the other organisational stressors they have to contend with. However, access to appropriate care is often limited by systemic, cultural, and logistical barriers. Dedicated mental health services tailored to this workforce remain scarce. This presentation will describe Responder Assist, a Victorian government funded mental health service tailored to the unique needs of emergency services workers. Grounded in research evidence and enriched by lived experience, co-production, and co-design, the model integrates purpose-designed service features intended to enhance access to care for current and former emergency services workers. The service also incorporates both internal and external communities of practice, and embedded research and quality improvement processes to support the ongoing evaluation and refinement of the model. Preliminary outcome data from 95 emergency services workers who accessed the service will be presented. The data suggests promising reductions in symptoms of posttraumatic stress disorder, psychological distress, depression, and anxiety.