Jeffrey Pestrak serves as Executive Schools Officer for Mastery Schools. Jeff began his career in education teaching high school science in the School District of Philadelphia, where he also served as a teacher coach and science curriculum writer. Jeff joined Mastery in 2005 and served as the founding principal of the Thomas Campus – our first turnaround school – before becoming Chief Academic Officer and then Chief of Schools. In his current role, Jeff works with Mastery’s chief academic officer and regional school officers to support quality programming and strong outcomes across the network.