Vicky Tuck has been principal of CLC since 1996
The principal of Cheltenham Ladies' College has announced she is to leave Gloucestershire next year.
Vicky Tuck, who has been principal of the college since 1996, has got a new job as the Director of the International School of Geneva.
"It has been an enormously fulfilling privilege to lead CLC for the past 14 years," said Vicky.
"CLC is a simply wonderful school and I know it will continue to flourish.
She also said she felt honoured "to work with gifted and dedicated colleagues, delightful and highly motivated students, engaging and discerning parents and a considerate and enlightened governing body that has always given me the fullest support."
She is looking forward to the new challenge and said that as a linguist, she "shall especially enjoy being able to function daily in both English and French."
The resignation is effective from September 2011.
Carolyn Kirby, Chairman of CLC's governing body said, "The college is indebted to Vicky Tuck for 14 years of inspirational leadership and commitment.
"We congratulate her on this very exciting new appointment and wish her well.
"She will be with us throughout the coming academic year, giving us ample opportunity to identify her successor and effect a smooth transition".