Nigel Adkins is to leave his role as Hull City head coach after 18 months in charge of the Championship club.
Having led the Tigers to a 13th-placed finish last season, Adkins says he rejected the offer of a new contract.
“After much careful consideration I have decided that our futures are not aligned,” the 54-year-old said a statement on social media.
Adkins will leave when his deal ends on 30 June and Hull say the search for his successor “is already under way”.
His assistant Andy Crosby will also leave at the end of the month.
Former Sheffield United, Reading, Southampton and Scunthorpe boss Adkins took over at the KCOM Stadium from Leonid Slutsky who had been the first Russian manager in English professional football.
Hull were 20th in the Championship when Adkins arrived in December 2017 and he secured their survival in the second tier, finishing 18th that season.
In March, Adkins said he wanted to see where the club was going before committing to a new contract.
Owners Assem and Ehab Allam have been trying to sell the Tigers since 2014.
Analysis
David Burns, BBC Radio Humberside’s Hull City commentator
I’m wondering how you drive away the most positive man in football, who was desperate to stay at the club and who had restored his managerial reputation while at Hull.
I understand Adkins was prepared to take a substantial pay cut to stay, but it was not about the money.
It was more about things like the resources he had at his disposal to enhance his squad, and having a reasonable chance of progressing the club.
He was having sleepless nights over the decision on whether to stay. Clearly he feels he could not take the club forward with the offer he was made and has taken what he calls the toughest decision of his career.
