Gary Caldwell has left his role as caretaker manage of Newcastle United U23s.
The former Magpies defender stepped in to take charge of the academy outfit after Chris Hogg left to join League One side MK Dons as assistant manager.
A statement released by NUFC said: "Caldwell stepped in on a short-term basis last month following the departure of Chris Hogg, and leaves with the recruitment process to appoint Hogg's full-time successor nearing completion.
"Current assistant Kevin Richardson will take the team for its upcoming fixtures ahead of a permanent appointment being announced shortly.
"The club would like to thank Gary for his contribution and wishes him well for the future."