Former player Shay Boland will not be involved as a selector next year along with Gearoid Ó Riain and Ed Coughlan.
“I know a couple of the lads had to step away,” said O’Callaghan. “It’s obviously a big commitment and a couple of them have to step away for that reason.
“I know Ger has been speaking to a few people about coming on board so I think he’s at the point of finalising that. I’m sure we’ll be hearing soon on that.
“There are a lot of (Dublin) lads who have had good, long careers and have put in loads of work for hurling as well.
“There are a number of lads there that Ger has lined up so we’re just waiting to hear back.
“It probably is (important) to have a couple of Dubs in there. I’d imagine that is what Ger is looking for as well and is trying to get a few on board. I suppose you would, as a player, like to have a few Dubs on board.”
O’Callaghan, who came on and scored a point for his new club Ballyboden St Enda’s in their county quarter-final win over St Oliver Plunkett’s/Eoghan Ruadh at the weekend, hasn’t heard too many whispers of retirements in the camp. Having turned 32 on Sunday, he’s not prepared to call it quits. “Playing for Dublin has always been a big thing for me. It would be very hard to walk away from it at this stage. As you get a bit older, you start to try to get yourself ready for that day. It’s inevitable. But I’d like to keep it going for as long as I can.”