European elderly care faces labor shortages, inadequate staffing, and a disconnect between demand and capacity, leading to stress and burnout among caregivers. Support4Resilience (S4R) aims to address these challenges by creating a research-based Toolbox. This Toolbox will assist healthcare leaders in enhancing the resilience and mental wellbeing of both formal and informal caregivers. It will identify factors affecting resilience and mental health, develop new theories, and offer cost-effective interventions. The S4R Toolbox comprises mapping, reflection, and reorganization tools, tailored for various healthcare contexts. Implemented in six European countries, it will be evaluated for effectiveness and cost-efficiency, supporting the development of resilient health systems in elderly care. The project is funded by the European Union. However, the views and opinions expressed are those of the author(s) only and do not necessarily reflect those of the European Union or the European Health & DigitalExecutive Agency. Neither the European Union nor the granting authority can be held responsible for them.