Eddie Howe is another manager who has consistently been linked with taking over at Celtic.
The 43-year-old left his post as Bournemouth boss last summer after eight years in charge where he was once tipped to become the next England manager.
Taking Bournemouth to the Premier League remains one of the most impressive managerial feats of recent years and at 43 years of age, Howe could bring something different to those more experienced.
Howe has taken his time on finding his next job, weighing up his options to take the right position. At Celtic, it could be a match made in heaven though with both parties benefitting.