According to caretaker manager Martin O'Neill, the Columbus Crew head coach will be in the Celtic dugout for this weekend's Premiership fixture against Heart of Midlothian.
The manager has been involved in detailed discussions with the Glasgow club for nearly seven days and now looks set to wrap up a contract.
Martin O'Neill has been acting as temporary gaffer for over four weeks ever since the previous manager resigned, securing six wins out of seven matches, narrowing the lead at the top in the league table and guiding the club to League Cup final spot.
The 73-year-old, who once coached Celtic between 2000 and 2005, had already said he expected Sunday's visit to Hibernian – a 2-1 victory – was likely to be the last game of his second spell at the helm.
However, O'Neill revealed he is to lead Celtic in Wednesday's league encounter with Dundee prior to Wilfried Nancy takes over.
"He's the individual set to be arriving," O'Neill told TalkSport. "I assumed it was over on Sunday, however there remains paperwork yet to be completed. Wednesday will definitely be my last match."
"It's been surreal," he added. "It resembles a chapter of your life that makes you wonder 'did all of that actually occur?' Am I happy that I've done it? Most certainly."
Should the Hoops beat Dundee while the Jambos overcome Killie on Wednesday, the incoming boss could guide Celtic to the top of the table if they win in his opening fixture in charge.
"That's a good fixture for him versus Hearts," remarked O'Neill. "A nice introduction. It is going to be a difficult game of course but I wish him well. At least he inherits a side full of confidence."
That confidence comes from the positive run on the field in the last month or so, where he has suffered just one defeat – a three-one defeat at Midtjylland during Europa League.
However, the ex- Republic of Ireland manager and his players then bounced back to achieve their first away win in Europe since way back in 2021 as they beat Feyenoord 3-1 last week.
"We lost by them," O'Neill recalled. "That proved to be a difficult match – a few weeks before they thrashed Nottingham Forest, making it difficult. To go to Feyenoord and win on their patch was fantastic. We've given ourselves an opportunity, with three games remaining to try to qualify, but that Feyenoord game was a restoration of belief."
When asked for his reflections during his spell as interim boss, O'Neill says it has prompted thoughts about whether he desires to continue managing going forward.
"I genuinely don't know," he admitted. "I'll take a little think about things after the match on Wednesday."
"It was challenging," he continued. "I felt the fear of failing – that is an ever-present major worry. I once joked that I was capable of doing this job just as poorly as many other gaffers."
"I have learned much. I've got some excellent coaching staff working with me and it has served as a refresh for me in several respects, interacting with young players every day."
Regarding if he might remain with the club in a consultancy role, the ex- Leicester City, Villa and Republic of Ireland manager stated this is completely up to Wilfried Nancy.
"That is solely for the incoming manager to decide," O'Neill stated. "He must be given full autonomy. Should he desire my advice on matters, that is acceptable. If he doesn't, that's not a problem at all. It's very much his team the minute he steps into the job."
Presenter Jim White ended the interview by asking O'Neill if he would be emotional once the final whistle blew on Wednesday.
"Are you asking if I will cry?" O'Neill responded. "Please don't be stupid."
Elara is a seasoned gaming journalist with a passion for slot mechanics and player strategies.
