The head of Hove Park School has resigned to take up another job as executive head of four schools in Kent.
Derek Trimmer will step down as the head of Hove Park executive head of West Blatchington Primary School at Easter.
His departure comes less than a year after a campaign against proposals to convert the school into an academy.
The senior deputy head teacher, Austen Hindman, will take over as acting head from the start of next term.
Mr Hindman and Mr Trimmer joined the school together in April 2011. At the time, the school was one of the lowest performing schools in Brighton and Hove.
It is now one of the most improved schools in the country and a recognised leader in using new technology in the classroom.
The chair of governors Mike Nicholls said: “One part of Derek’s legacy at Hove Park is distributed leadership.
“The school has excellent staff and a common purpose, which is to raise attainment for all pupils, regardless of background.”
Mr Hindman was praised in the 2013 Ofsted report for his leadership of teaching and learning within the school.
He said: “I am thrilled at the opportunity to lead Hove Park School into the next phase of its development.
“We have a wonderful community here and I am looking forward to another set of record results this summer.”
Mr Trimmer is leaving to become executive head teacher for secondary provision for Swale Academies, an academy trust consisting of four secondary and four primary academies in Kent.
He said: “I have had a tremendously exciting and rewarding four years here at Hove Park that has seen the school go from strength to strength.
“As part of this journey, I have been privileged to help shape and lead the finest leadership team in education that will take the school to outstanding and beyond.
“Team HP is unique in that the core values of ambition and drive permeate every part of the school.
“There is no one person that is responsible for our success. It is shared by all.
“This is Matt Busby’s special 11 and we are set to continue our progress this year and beyond.
“I would like to pay special tribute to the staff, governors, parents and the students of the school who are the finest in the land.
“I am also delighted to see Austen Hindman step in as head teacher from Easter as we ensure that it is business as usual in the run up to this year’s exams.
“This summer’s results will herald yet another new dawn for this city in terms of setting the standard for other schools to follow.
“At the same time I am incredibly excited about working in my new role and helping to shape the education for a community of young people, empowering them to achieve better outcomes in their lives.
“Swale Academies has already had a positive and significant impact on improving standards across parts of Kent and I am honoured to become part of this transformation.”