Background Persons with a diagnosis of severe mental illness have a life expectancy that is 20 years lower than the general population, and they are disproportionately affected by cardiovascular disorders. Improving the management of cardiovascular risk is one of the main challenges for the public health system. In the care pathway of persons with a diagnosis of severe mental illness, a better understanding of limiting and facilitating factors is required. The objective was to include persons with a diagnosis of severe mental illness, carers, and primary and mental health professionals in the creation and evaluation (feasibility) of a health promotion program designed to improve cardiovascular risk management through empowerment. Methods This study combines a mixed methodology with qualitative and quantitative components. A multicenter prospective qualitative study was conducted in seven mental health units in France and was coordinated by a steering committee composed of persons with a diagnosis of severe mental illness, carers, and primary and mental health professionals. Results This health promotion program must enable persons with a diagnosis of severe mental illness to assert their right to self-determination and to exercise greater control over their lives, beyond their diagnosis and care. Following a preliminary feasibility study, the effectiveness of this new tool will be evaluated using a randomized controlled trial in a second study. Conclusions The findings can be used by health organizations as a starting point for developing new and improved services for persons with a diagnosis of severe mental illness. Trial registration Clinical Trials Gov NCT03689296. Date registered September 28, 2018