Michael Nicholson has been appointed as Celtic chief executive on a permanent basis as part of a shake-up at Parkhead.
The former lawyer stepped into breach when Dominic McKay resigned just weeks into his new job.
The former Scottish Rugby chief was intended as the replacement for Peter Lawwell but stepped down from the job in a shock move.
That saw Nicholson promoted to acting CEO and the club have announced he will take on that role permanently, along with some other tweaks at boardroom level.
Financial director Chris McKay will become Celtic's chief financial officer "with a broader range of executive responsibilities".
Nicholson grew up supporting the club and has been involved at Parkhead since 2013.
He said: "As a Celtic supporter all my life, I will do everything I can to drive the club forward, working at all times in the best interests of Celtic.
“I have been fortunate to be part of this great institution for a number of years and it is a privilege to now hold this new responsibility.
"We have a team of brilliant people who are absolutely committed to Celtic and we will work together to deliver success for the club and our supporters.
“I look forward to working with Ange, the Board, our colleagues and supporters in order to advance as a club, proud of our traditions and dedicated to constant improvement.
“The current environment remains uncertain and everyone at the club recognises and sincerely appreciates the ongoing commitment of our supporters. Our League Cup victory at the weekend gives us all something to celebrate and we look forward to continuing success for Celtic Football Club.”
