The rise in the number of people on sick leave for common mental disorders is a growing concern, both from a societal and individual perspective. One common suggestion to improve the return-to-work process is increased cooperation between the relevant parties, including at least the employer, the social insurance agency and health care. This suggestion is often made on the presumption that all parties share the common goal of reintegrating the patient-employee back into the workplace. In this paper we investigate this presumption by mapping out the ethical frameworks of these three key actors in any return-to-work process. We show that although the goals of these actors often, and to a large extent, overlap there are potential differences and tensions between their respective goals. Further, we emphasise that there may be other limitations to an actor's participation in the process. In particular the health care system is required to respect patient autonomy and confidentiality. There is also an inherent tension in the dual roles of health care professionals as therapists and expert witnesses in work ability assessment. In conclusion, there are potential tensions between the key actors in the return-to-work process. These tensions need to be addressed in order to enable an increased cooperation between actors and to facilitate the development of a feasible plan of action for all parties, including the employee.