Ahead of a much-needed summer rebuild, Celtic will be looking to appoint the right individual for the challenge, and a host of high-profile candidates have been linked with the position over the past few months.
Here's a look at OddsChecker's top twenty contenders to become Celtic's next manager, as the race starts to heat up:
13. Alex Neil - Current odds: 20/1
His Preston North End side continue to flirt with the play-off places in the Championship, but can't quite go the extra mile and secure promotion to the top tier. The ex-Hamilton man has been at Deepdale since the summer of 2017. Photo: Lewis Storey
14. Roy Keane - Current odds: 18/1
Keane finished his playing career with Celtic, and is believed to be eyeing up a return to management - a decade on from a spell with Ipswich Town. In his first job, at Sunderland, he won the Championship back in 2007. Photo: Pool
15. Steve Clarke - Current odds: 10/1
Would Clarke really give up the chance to manage Scotland in their first major tournament since 1998? Prior to taking on his current role, he had spells as an assistant with Chelsea and Liverpool, as well as managing West Brom, Reading and Kilmarnock. Photo: Srdjan Stevanovic
16. Rafael Benitez - Current odds: 10/1
Having managed the likes of Liverpool, Real Madrid and Napoli in his coaching career thus far, the 60-year-old has built up quite the CV. His most recent role was out in China, managing Dalian Professional FC. Photo: STR