This study examines how a mathematics professional learning (PL) program can contribute to building the capacity of local facilitators to implement PL designed to make high-quality instruction accessible to all students. Thirty-one local facilitators were trained in the use of the Math for All PL program and implemented it over one school year. Findings based on survey and observation data show that with appropriate support, local facilitators were able to implement the program with high fidelity, and program use contributed to their comfort and preparedness for facilitating PL. Facilitators who varied in recent PL experience benefited differently from the PL and support they received. These findings have implications for preparing and supporting local facilitators and for future research.