Coach Duncan, who has been clubless since he was abruptly sacked by Hearts of Oak, will be on the bench of the newly promoted side during the new season.
Fred Pappoe, Chief Executive of Great Olympics on Wednesday announced that, they are in negotiations with the coach and will conclude by the close of the week.
According to Pappoe, the coach has agreed to join them for the coming season and they are tying up the minor knots in the contract.
He said the addition of Duncan to the technical team is part of plans to augment the technical team for the new season.
Coach Duncan, will be making a return to the club where he started his coaching career.