BACKGROUND: Lack of mental health literacy among rehabilitation professionals and employers in the return-to-work of persons with mental health problems resulted in the development of a three-day group training program, the Support to Employers from rehabilitation Actors about Mental health (SEAM) intervention.

OBJECTIVE: To evaluate the impact of SEAM on rehabilitation professionals' knowledge and beliefs, attitudes, and supporting behaviors towards people with mental health problems and employers as part of the return-to-work process.

METHODS: In this longitudinal study, 94 rehabilitation professionals were included. Data were collected prior to (T1), immediately after (T2) and 6 months after SEAM training (T3) using knowledge and attitude scales and a questionnaire on supporting behaviors. SEAM includes training in Mental Health First Aid, presentations and discussions on current research on work and mental health, and strategies and communication guidelines to use when meeting service users and employers as part of the return-to-work of persons with mental health problems. SEAM also includes a homepage with targeted employer information. Data were analyzed using non-parametric statistics.

RESULTS: SEAM significantly increased rehabilitation professionals' knowledge of mental health (T1-T2: z = -2.037, p = 0.042; T2-T3: z = -5.093, p = 0.001), and improved their attitudes towards persons with mental health problems (T1-T2: z = 4.984, p = 0.001). Professionals (50-60%) also estimated that they had increased their use of supporting strategies towards service users and employers.

CONCLUSIONS: The study suggests that SEAM can increase mental health literacy among rehabilitation professionals and lead to a greater focus on service users' resources and work ability, as well as on employers' support needs.