Steve Gallen has left Queens Park Rangers following a 19-year spell as a coach at Loftus Road.
The 42-year-old, who joined the R's in 1997, held a series of different posts in the west London club's youth set-up.
He became first-team coach last summer under then head coach Chris Ramsey but new boss Jimmy Floyd Hasselbaink has brought in his own staff.
"We are sorry to see Steve leave. He has been a huge part of the club," said director of football Les Ferdinand.
"I have been in dialogue with Steve for several weeks as we sought to find him a role within the academy set-up, which is where a vast amount of his experience lies.
"Unfortunately we have been unable to offer Steve a role which he felt was right for him."
The Gallen footballing family
The former QPR youth player is the middle of the three footballing Gallen brothers, who hail from west London.
Kevin Gallen, 40, remains the sixth highest scorer in QPR history, having netted 104 goals for the club between 1994 and 2007.
Eldest brother Joe Gallen, 43, who became part of the QPR backroom team when his playing days finished, is now assistant head coach to Kenny Jackett at another Championship side Wolves.