It is not yet clear if Lennon will be given the Celtic managerial role on a permanent basis, and Rieper believes that the Glasgow giants should consider former Croatia international defender Bilic.
Rieper was on the books of the Hoops from 1997 until 2000 and also played with Bilic at West Ham.
Rieper told The Herald about Bilic: “I’ve spoken to him before about Celtic being a massive club and he’s really aware of that. I think he’d fit the bill there.”
Rieper added: “I think West Ham were premature getting rid of him but that’s the way it goes if you lose a few games. Slaven’s tremendously passionate about football.
“I spoke to him a few times when he was at West Ham and Croatia and I think he plays a style of football that would suit Celtic really well.”
Lennon is tried and tested at Celtic, and he is a safe pair of hands who is set to guide the Hoops to the Scottish Premiership title this season.
However, the football that Lennon plays is not exactly great, and that is where Bilic is better.
Bilic likes attacking and attractive football, but at the same time, the West Ham boss does not ignore the defence.