Ruth Renton, the JFS chair of governors has stepped down as from the role - to give full attention to her professional career as an employment lawyer.
Mrs Renton, a former head girl at the north-west London School, had been involved with the governing body for four years.
A email to parents on Tuesday said:” It is with sincere regret that we share with you that our Chair of Governors, Mrs Ruth Renton has stepped down as Chair.
“Ruth stepped into the role at a time of great challenge for JFS and has successfully overseen our return to a ‘Good’ Ofsted grading. She has given of her time and extensive expertise tirelessly and we owe her a great debt of gratitude for all that she has done.
