The Norwegian was able to sign off by guiding the Hoops to their fifth Scottish Premiership title in a row.
Former Celtic boss Ronny Deila has suggested that his decision to tell the squad that he would be leaving the club at the end of this past season played a role in the Hoops clinching the Scottish Premiership crown, The Scottish Sun reports.
The Norwegian may have ultimately won the league title in both of his campaigns at the helm, but he faced plenty of criticism during his second year with the club as the Bhoys once again failed in Europe, struggled to pull away from Aberdeen in the title race and lost to then-Scottish Championship side Rangers in the Scottish Cup semi-final.
And it was after that loss at Hampden Park that Deila made the decision to inform his team that he would be stepping down, but he explained that the decision actually had a positive impact on the squad.
"The debate about my future influenced the squad. I felt I was a burden to the team," he told The Scottish Sun.
"The players were terrified of losing and, after the loss against Rangers in the cup I said to the team this was my last season. It liberated them and released energy into them. From then, we went on to win the league."
It appears that Deila's assessment of the mood of the squad was accurate. Going into their game with their Old Firm foes, the Hoops were eight points clear of the Dons at the top of the table.
But while they managed to extend that lead to 15 points during the final five fixtures of the campaign, their form in the remaining games followed a similar pattern to the rest of the matches they played under Deila.
They won three - including a 7-0 thrashing of Motherwell on the final day - drew one and lost one and were grateful to Derek McInnes' side as they lost four of their last five games to ensure that the Bhoys were put under no pressure in the final weeks.
Nevertheless, their success would have undoubtedly given the squad confidence ahead of Brendan Rodgers' arrival as it proved that they had the ability to win titles even when they were struggling for form.