The Blackburn manager has both club and country managerial experience and Oster is sure that he will be a perfect candidate once Sir Alex Ferguson finally steps down from the Old Trafford hotseat.
The 29-year-old, who has been capped 13 times by Wales said; "I played under Mark for Wales and he was just brilliant. He commands the utmost respect for what he's done in the game.
"He has good backroom staff with Eddie Niedzwiecki and Mark Bowen. They were with him at Wales as well and he's taken them to Blackburn because he knows them quite well.
"There's no surprise to me that whenever a decent job comes up his name gets put forward. He's a good manager and he'll only go on to bigger and better things.
"Who knows he could be the next Manchester United manager one day."
Oster could see the similarities between the two managers he knows well, who meet on Saturday, Hughes and current boss Steve Coppell.
He added: "Mark is not one to rant and rave all the time, but when he talks you listen. He gets his point across, a bit like Steve Coppell really, but he can blow his top if needs be.
"He's taken Blackburn from being a mediocre Premier League team to one that should be heading into Europe. They are a very good team."