This paper focuses on engaging and enabling educators to play new roles and take new leadership in the paradigm shift between traditional and competency-based education: a system of learning designed to ensure that all learners are prepared with the knowledge, skills and dispositions to be successful lifelong learners. The paper re-envisions professional practice, learning and development for competency-based education. It describes a teaching profession that is equity-oriented, learning-centered and lifelong, and details strategies that can help realize this paradigm shift. Throughout, the author builds on exemplars of success across the nation and explores how communities can work together to coordinate and sustain complex systems change. She begins with a reflection on adaptive change, exploring the questions, "what is the purpose of competency-based education?" and "what traditional beliefs and values does competency-based education challenge? What core assumptions about the teaching profession must we confront and shift if we want to transform it?" After engaging with these questions, specific technical changes needed to actually shift professional culture and practice at scale are explored. The author then seeks to answer the questions, "what systems, structures and policies do we need to put in place to support a paradigm shift in teaching practice?" and, "how can educators, young people and communities lead this work?" [This paper was written in collaboration with a Technical Advisory Group (TAG) of national competency-based education experts.]