O’Neill final managed in 2019 throughout a quick spell at Nottingham Forest after his time as Republic of Eire supervisor got here to an finish the 12 months earlier than.
His tenure at Celtic was iconic for the membership’s supporters, with few managers of their historical past held in increased regard.
He received three league titles, three Scottish Cups, a Scottish League Cup and steered Celtic to the Uefa Cup last.
“It is quick time period. Celtic are in all probability shocked on the information Brendan left. They’re clearly looking for a everlasting supervisor, so it is a short-term match,” mentioned O’Neill, who has introduced in Shaun Maloney to help him.
“Interim does imply interim. It is so simple as that. Celtic are searching for, I assume, a younger coach with confirmed means. We need to pull the membership ahead now.
“Naturally, I had a brilliant time at Celtic, it was a privilege. I am unable to emphasise sufficient, it is quick time period till a everlasting supervisor is appointed. I am going to simply preserve the seat heat.
“I’d simply name Henrik Larsson [star striker when he was at Celtic] and ask him if he is been staying within the gymnasium.”
The Scottish Premiership champions are eight factors behind early pacesetters Coronary heart of Midlothian after dropping 3-1 at Tynecastle on Sunday.
Celtic have additionally had a modest European marketing campaign and an underwhelming switch window.
In an astonishing letter to followers, Desmond challenged Rodgers’ assertion that he was not formally provided a contract extension, denied that signings have been imposed upon the supervisor, and criticised his “want for self-preservation on the expense of others”.
“In actuality, he was given last say over all soccer issues and was persistently backed within the recruitment course of, together with report funding in gamers he personally recognized and permitted.
“Regrettably, his phrases and actions since then have been divisive, deceptive and self-serving. They’ve contributed to a poisonous ambiance across the membership and fuelled hostility in direction of members of the manager workforce and the board.
“What has failed just lately was not because of our construction or mannequin however to at least one particular person’s want for self-preservation on the expense of others.”
Rodgers has been approached for remark.

