Aberdeen chief executive Keith Wyness has resigned from the club.
Wyness has been at Pittodrie for three years
Wyness, who has been running the Dons for three years, has been strongly linked with a move to Everton.
Finance director Duncan Fraser will share leadership duties at Pittodrie with Willie Miller, the club's director of football.
"It's been a great privilege to work for AFC but the time is right to move on," said Wyness. "I said I'd leave once I'd achieved key objectives."
He added: "A number of very successful processes, initiatives and commercial deals, on which the club can build in the future, are now in place and I am confident that the current management team can take these forward.
"Against a backdrop of severe cost-cutting and the declining health of Scottish football, the club has made progress and is performing better than ever in critical areas.
"Indeed, we are recognised for our 'best practice' in footballing circles."
Wyness has a background in the leisure industry and was founder and managing director of The Olympic Club, a marketing venture for the Sydney Games in 2000.
The Aberdeen-born industrial economics graduate also spent seven years with British Airways and spent time in USA co-founding the Radisson Diamond cruise ship project.
Everton are due to make an announcement about the future running of the club on Friday and Wyness could well be named as the club's new chief executive.