Walker left his player/coach role at the City Ground after Gary Megson's arrival at the club and had been strongly linked with a role at City after Pearce was confirmed as permanent manager.
This morning's Star claims that reserve team boss Asa Hartford will be leaving the club with Des appointed in his place.
Pearce may also try and get Nigel Clough as his assistant after failing in a move for former Forest caretaker boss Mick Harford.