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:
1. Mark Hughes - Current odds: 33/1
Offering an experienced option, Hughes has racked up 610 matches as a manager, taking charge of the likes of Blackburn Rovers, Manchester City. His last role was with Southampton, who he left after just 27 games in 2018.
Photo: GLYN KIRK
2. Damien Duff - Current odds: 33/1
He was part of the coaching side that saw Celtic claim a third domestic treble on the bounce in 2018/19, and went on to assist Stephen Kenny in the Republic of Ireland job.
Photo: Mark Runnacles
3. Slaven Bilic - Current odds: 33/1
He's out in China managing Beijing Guoan, after losing his job at West Brom in December despite getting them promoted last season. He's been linked with the Celtic job a fair few times in the past.
Photo: MARTIN RICKETT
4. Nathan Jones - Current odds: 33/1
The Welshman has done a fine job since returning for a second spell at Luton Town, saving the side from relegation last season and working to establish them as a mid-table side in the 2020/21 campaign.
Photo: Nathan Stirk