Catholic private schools continue to make improvements, both in governance and learning innovation. Education service providers are encouraged to innovate to be able to face government policies and free market competition. One of them is through social entrepreneurship because social entrepreneurship is slowly entering the education system. Social entrepreneurship, with its mission-driven focus on creating value and positive environmental impact, supports the sustainability of the institution. By implementing social entrepreneurship in the management of school institutions, education plays a role in overcoming social and environmental problems. This study aims to analyze social entrepreneurship management for school sustainability, taking the objects of Sint Antonius Junior High School East Jakarta and Sang Timur Junior High School Karang Tengah. This qualitative research uses observation methods, in-depth interviews using snowball techniques, and forum group discussion on 165 informants. The research aspects are social entrepreneurship, social entrepreneurship strategy, social entrepreneurship management, the impact of implementing social entrepreneurship management, and the linkage of social entrepreneurship management with ISO 26000 and SDGs no. 4 and 12. The findings show that both schools have implemented social entrepreneurship, which needs to be improved for school sustainability. This study provides recommendations for education providers on whether they should develop social entrepreneurship management for school sustainability. Institutions need to build a comprehensive social entrepreneurship management system that is strengthened with a focus on social entrepreneurship and support of social entrepreneurship processes.