Immanuel College deputy head Martin Blain is to leave in January after being appointed head of a new secondary school in the Radlett/Shenley area.
The New North London Synagogue member — who joined Immanuel in April 2012 — has been chosen to lead Harperbury School, which is due to open next September.
Mr Blain, who was one of the founders of the Alma free school, was “absolutely thrilled” at the headship. “This is a most exciting educational development and we are committed to using the best ideas and technology to create this ground-breaking school for our children.
“I have really enjoyed my short time at Immanuel and I’ll be sad to leave. But this was a fantastic opportunity,” he said.
While at Immanuel, Mr Blain oversaw a revision of the weekly timetable and the better tracking of pupil progress.
Immanuel students achieved 65 per cent of their A-levels at A* or A grade.
The percentage of students attaining at least five GCSEs from A* to C including maths and English leapt from 83 per cent in 2012 to 94 per cent this year.