The 52-year-old former footballer has held various coaching roles at the club over the years, most recently as caretaker boss for the second time in 2022, and he will never give up on being in charge one day.
He told Jamie Carragher for the Daily Telegraph: "I would love to be the manager of Everton again. I know it looks a long way off, but that’s the dream. You have to keep your dreams alive, don’t you? I know what I need to do first; to get a job, have a bit of success, prove myself. But I’d still love it, even if it is five or 10 years from now. I love the club too much to give up that dream.”
Duncan thought he'd get the manager's job before Frank Lampard came in in 2022 and he still believes he'd have done better with the squad than the former Chelsea star - who ultimately left in January 2023 after a year at the helm - managed.
He said: “It was massive just to have that experience. Not many can say they managed Everton, can they
“I felt they could have stuck with me the [second] time when they brought Frank in. Just to give me a chance until the end of that season because I knew the team and would also have kept us up. Then they could have looked at it at the end of the season."
Since leaving Everton, Duncan has taken on "tough" jobs with Forest Green Rovers and Inverness Caledonian Thistle and believed he did the best he could with managing both sides.
He said: “I have taken on tough jobs and I don’t know how people perceive it, but my record is good overall.
“I lost my job in Inverness because of administration. Given the situation, to lose only 16 of the 53 games there wasn’t bad. At Forest Green, Harry Houdini couldn’t have gotten them a win at that time.”