Dan Ashworth will leave his position as technical director at the Football Association to take on the same role with Premier League club Brighton.
Ashworth has been an influential member of the England national team setup since leaving West Brom in 2013, joining the FA during former Baggies boss Roy Hodgson's time in charge of the Three Lions.
The 47-year-old was a central figure in the recruitment process that led to Gareth Southgate's appointment as Sam Allardyce's successor.
Ashworth will join Brighton in 2019 and, alongside England's run to the semi-finals of the 2018 World Cup, he leaves an impressive legacy at St George's Park.