Abstract With 14 million Ukrainians in need of psychological aid (UNDP) and a strained health system, UA urgently requires mental health and psychological support services (MHPSS). As a TA partner on the USAID funded Public Health System Recovery and Resilience project in UA, the Philadelphia (PHL) team supports capacity building for population-based MHPSS at the community level with a study tour strategy. Such approaches apply to other countries interested in remodeling public health systems. The strategy aims to advance community based MHPSS through in person tours in PHL with remote follow up to stimulate vision, exchange ideas and accelerate action among governmental, community, and academic partners. The study tours presented overviews on health policy, system development, program services delivered to children and adults, community interventions, and workforce development of professionals and paraprofessionals. All included the foundational principles of trauma-informed practice. The June 2023 tour hosted 11 decision makers and regional officials who embraced the vision for system development and endorsed further engagement. The December 2023 tour hosted 13 practitioners and coordinators of health and social services to observe community programs. Results include development of PHL NGOs and UA social service hub partnerships to implement train the trainer programs for peers/people with lived experience and for mural arts programs to promote community engagement and empowerment. The September 2024 tour involves university partners from nursing, social work and psychology and PHL counterparts to strengthen curricula to include mental health competencies, support faculty development with potential for collaborative research and student exchange, and design post-graduate continuing education courses for upskilling the incumbent workforce. Study tours and direct exchange are an effective strategy for capacity building for MHPSS in Ukraine to address population health needs. Key messages • The sequenced study tour strategy affects distinct levels of change makers in UA. The results are governmental buy-in, partnerships for programmatic development, and academic advancement. • The study tour model promotes systematic change and offers solutions to MHPSS workforce shortages through information exchange, relationship building, and capacity development.