Hannele Reece, interim headteacher at Kantor King Solomon High School for most of this year, has been appointed permanently to the post.
She succeeds Matthew Slater, who had been absent for seven months before leaving for unexplained “personal reasons” in May after three years as headteacher.
Ms Reece, who joined KKSHS 19 years ago, as a newly qualified history teacher, rose to become head of humanities, assistant head and deputy head.
Governors said she had expertise in implementing the school’s teaching and learning quality assurance frameworks and had been an approved Ofsted inspector.