England assistant coach Paul Farbrace will leave to join Warwickshire ahead of the year's home World Cup and Ashes.
Farbrace, credited with helping
England coach Trevor Bayliss had already announced he was standing down as England head coach when his contract ends in December, leaving Farbrace facing an uncertain future.
Farbrace, who first worked under Bayliss when the latter was Sri Lanka coach, joined the England staff in 2014 after guiding Sri Lanka to the World T20 title that year.
After England's woeful early exit at the 2015 World Cup, which saw Peter Moores sacked as head coach, Farbrace took caretaker charge of the side before joining forces with Bayliss again.
The pair have since helped guide England to the top of the ODI rankings.