In Ontario, as in other jurisdictions, return to work (RTW) and disability prevention have become high priorities for employers and insurers given the increasing duration of lost-time claims in recent years. Research evidence suggests that RTW coordination may be helpful in improving RTW. However, details on how to successfully implement a RTW program based on RTW coordination are lacking. Intervention mapping is a methodology that is used to develop and implement complex interventions or programs. We used this approach to develop a RTW program based on RTW coordination that is tailored to the Ontario setting. In this plenary, the methodology used and the findings will be described.