St.John is a director of NPQonline. Following fourteen years as a headteacher, St.John worked for the National College for Teaching and Learning as a member of their quality assurance team and an online facilitator, continuing this work as a director of the team into its new form, NPQonline. Having worked as an assessor and national moderator in the previous iteration of the NPQ programmes, he worked with EMSE and Frank Clare (Gateway assessment) to develop a final assessment model for the new NPQs.
St.John also works as a school improvement partner, has been a Lead Inspector, and is signed off as an early years inspector. He has worked on a wide range of programmes and roles, including Tomorrow’s Heads, the national Chair of Governor training, Initial Teacher Training with a University, School reviewer for a Local Authority Trust, coach and face-to-face facilitator.