Conservation of built heritage requires a skilled workforce, yet many practitioners working with heritage properties lack access to conservation training programs. The Seismic Retrofitting Project (SRP), a collaboration between the Getty Conservation Institute, the Ministry of Culture of Peru, and the Municipality of Lima, aims to design, test, and implement seismic retrofitting strategies for earthen buildings using traditional techniques and local materials. A key aspect of the project is developing a long-term capacity-building strategy for professionals in Peru and Latin America, focusing on diagnosis, conservation, and management of earthen heritage properties in high seismic hazard areas. Based on an assessment of current professional needs and local challenges, the strategy includes developing specialized training modules, fostering collaborative networks, and demonstrating relevant and accessible technologies and methodologies. It has provided participants from several countries in Latin America with opportunities to see practical applications of skills at implementation sites in Cusco and Lima. Apart from technical workshops, on-site training has been provided to Peruvian professionals from partner institutions, while additional activities have been organized for various stakeholder groups, including non-technical audiences, based on the needs of the implementation sites. This paper covers the development of capacity-building curricula and activities organized as part of the SRP, their impacts, and future steps for sustaining and expanding these efforts.