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Background: In significant events like chemical, biological, radiological, nuclear, and explosive (CBRNE) incidents, additional expertise in specific chemical substances becomes essential. Train-the-trainer programmes are used to increase knowledge and skills in a variety of fields and have been shown to be a cost-effective training method, eliminating the necessity of bringing in external experts or requiring participants to travel outside their region. Care in Hazardous Environments (CiHE) is one example of a course which comprises basic multi-disciplinary training together with personnel from rescue, police, and emergency medical services to prepare them to handle chemical and radioactive nuclear incidents. The train-the-trainer programme described in this study contains both theoretical and practical components, intended for instructors who will lead training on CiHE incidents. This study aimed to evaluate trainers’ level of knowledge before and after a train-the-trainer programme, as well as their thoughts about becoming an instructor i.e. the pedagogical competence for the Care in Hazardous Environments course.

Methods: A pre- and post-test, along with an evaluation of open-ended response options were employed to assess the effectiveness of the train-the-trainer programme for teaching the basic course (CiHE). A total of 49 participants were enrolled in the programme.

Results: Participants showed significant improvement in chemical, radiological and nuclear (CRN) response knowledge in two of the eight questions between the pre- and post-tests. The two questions that improved pertained to chemical substances and basic principles of radiation protection. Instructors trained in the train-the-trainer programme are intended to bring new knowledge, incorporate a rarely discussed topic into instruction regularly, and de-stigmatise CRN incidents by helping raise the minimum competency levels in their respective organisation.

Conclusion: An effective response to CBRNE events begins with readiness. First responders must be prepared and possess knowledge of both CRN components as well as protective gear to keep themselves and others safe at the incident scene. This study shows the importance of the train-the-trainer programme in continuing to educate police, and personnel from rescue and emergency medical services in CiHE, enable them to collaboratively prepare to handle CRN incidents.