Many International Schools have professional development (PD) resources for developing middle leaders. However, there seems to be a significant gap in leadership resources and support for Senior Leaders. It is often assumed that Senior Leaders engage in self-directed PD by reading and attending conferences and workshops. These individual professional learning tracks, though, don’t contribute to developing the next generation of leaders for the school. I will share my experience and strategies for how I ensure leadership development programs don’t just contribute to developing aspiring leaders, but also develop senior leadership capabilities during the process. I will provide evidence by way of case and empirical data how mentoring has not only contributed to the development of leaders across a school, but also ensured the learning was embedded in school development initiatives.