Approximately four years and four months ago, Ange Postecoglou was named as the head coach of Celtic and tasked with restoring the Hoops place at the top of Scottish Premiership.
Appointed on 10 June 2021, the Australian boss entered the Celtic Park doors with the club in the midst of a crisis. Rangers had won the league in invincible fashion and a protracted move to install Eddie Howe as their new boss has fallen at the final hurdle. Big Ange - as he came to be known - was a supposed ‘second choice’. The rest, as they say, is history.
His success ultimately saw him poached by Tottenham Hotspur, where he went on to win the Europa League last trophy last summer before being sacked by the North London outfit the following week. A short stint at Nottingham Forest would follow, where he last just 39 days before being shown the door.
Linked to the vacant role at Celtic Park earlier in the week, following the resignation of Brendan Rodgers, there a plenty of supporters who would welcome his return, with many believing the bulk of his success in Glasgow came from his ability to spot talent and recruit them into a system which was very much his own.
But who were his best signings during his tenure at the club? With Kyogo Furuhashi, Matt O’Riley and Jota making huge improvements to Celtic during his time as head coach, it is hard to pick his best buy. However, here at The Scotsman, we tried our best to do so.
These are the 27 Celtic signing made during Postecoglou’s time at the club, ranked from worst to best.
13. Johnny Kenny
Impressed on loan at Shamrock Rovers, and has become an important part of the Celtic squad in the last year upon his return. Has scored three times for the club this season, and is beginning to mould himself into an exciting option for the Hoops. | SNS Group Photo: SNS Group
14. Giorgos Giakoumakis
Offered Postecoglou a fantastic alternative to Kyogo off the bench during his two seasons at the club. Departing the club to sign for Atlanta in the MLS in 2023, he's had a nomadic career since his departure, signing for Mexican side Cruz Azul in 2024, before moving on loan to PAOK this summer. | SNS Group Photo: Craig Williamson - SNS Group
15. Aaron Mooy
Arrived on a free transfer in 2023 without much fan fare and ended the campaign a real fan favourite. Surprisingly confirmed his retirement from football at the end of that season, but was a shrewd free transfer addition by the ex-Celtic boss. | SNS Group Photo: Craig Foy - SNS Group
16. Liel Adada
While his departure from Celtic may have soured memories for both player and fans, there's no doubt the Israeli was a successful addition by the Australian boss. Hit double figures in his first two seasons with the club before moving to the MLS with Charlotte FC in March 2024, where he still remains. | SNS Group Photo: Craig Williamson - SNS Group