Bristol City Council’s chief executive Anna Klonowski has resigned in order to focus on her role as a primary carer for her parents.
Ms Klonowski, who was appointed in February, will leave the council at the end of the month.
In a statement the council said the decision was taken over the summer “in the light of her parents’ declining health” and has been “fully supported” by Bristol mayor Marvin Rees.
Ms Klonowski said it had been an “incredibly difficult decision” as she was “hugely committed” to the council, but added that her “duties as a daughter are my top priority”.
She said: “The council has faced huge difficulties in the last few years and I am proud to have helped turn around many areas of performance.
“Of course many of the difficulties faced by the council are not of its own making, but I am confident that the improvements I have made alongside the Mayor will stand it in a far better stead.”
Mr Rees said Ms Klonowski had brought “true passion and dedication” to the role.
He added: “I respect and fully support her decision and wish her and her family the very best.
“We will take some time to carefully consider the future shape of the council’s management, meaning we will not immediately seek a like-for-like replacement. However, business as usual continues and arrangements for the statutory designation of ‘Head of Paid Service’ will be put in place before Anna departs.”
Mr Rees ordered an investigation into the council’s management in February after claiming an illegal budget had been set.