Leeds tried to sign the player in 2014 but he headed to Italy instead.
The Swiss defender is the perfect Championship player.
The Italian is to become the sporting director at Palermo.
The Italian is set to leave Watford role this week.
Nicola Salerno is leaving Watford and keen to work again in England. Could Leeds re-appoint him in his old role?
The former Leeds sporting director has been working at Watford since last summer.
The Slovenian was heavily linked with a move to Leeds in 2014.
Nicola Salerno has commented on Leeds chairman Massimo Cellino.
The former sporting director signed Bamba for Leeds.
Watford and Leeds United will face each other in the FA Cup on Saturday.