This CODE Leadership Conversation presents a research-informed, action-oriented framework for directors of education seeking to cultivate strong, cohesive senior leadership teams. It examines the shift from individual skill development to organizational learning and outlines five key roles directors play in building their team's leadership capacity. Drawing on evidence-informed design principles—including trust-building, disciplined inquiry, adaptive learning, and equity-driven practice—the paper offers practical guidance for designing professional learning that drives system-wide impact. It also addresses the enablers and challenges of senior leadership development and provides reflection questions to support boards in building future-ready leadership teams.