A resilient health system can withstand everyday stressors and unexpected shocks to ensure the continuous provision of both routine and emergency health services during times of calm and crisis. This report sets forth a strategic approach that can guide USAID missions in scaling private sector engagement in health system resilience (HSR) efforts. The approach builds on global evidence and key informant interviews pertaining to the two broad components of building effective HSR: (1) adequately preparing national health systems before events occur and (2) supporting them to effectively manage events when they occur. To adequately strengthen the health system to manage various stressors and shocks, a range of partners need to be identified and engaged before an event occurs. SHOPS Plus identified four critical steps to take in this phase.