Dr Ian Mitchell has left the Football Association of Wales (FAW) to join Newcastle United as the Premier League club's new head of psychology.
Mitchell rejoined the FAW as head of performance psychology in April, having worked there from 2014 to 2018.
After his first stint with the FAW, he spent five years with the Football Association in England.
Mitchell, an ex-Hereford United player, also worked with Swansea City during their time in the Premier League.
Although he is leaving his FAW role on a full-time basis to join Newcastle, he will continue to work with Wales' senior men's side for the rest of their Euro 2024 qualifying campaign.