Cahill: Moyes right choice
Cahill was one of Moyes' key signings in 2004, with the Australian going on to play over 200 games for the Toffees in eight years after joining from Millwall for a reported £1.5million fee before moving to Major League Soccer outfit New York Red Bulls last year.
The 33-year-old believes Moyes is the perfect choice to take charge at United due to his success at Everton as well as the continued stability he can give the champions in the wake of Ferguson's departure at the end of the Premier League campaign.
"You look at any other manager in the world I think, other than Pep Guardiola, there's only one man on the list and that's David Moyes that would suit a club like Manchester United," Cahill told Sky Sports News.
"He's done so much for the game and to have the opportunity to go to one of the biggest clubs in the world and try and do something special, and win something and continue their level of success is a remarkable stature of the man he is and how much they respect him as a football manager.
"Do you want that manager that's been at the top level and bounced around all the European clubs, bringing in all his own staff in, changing the footprint of what Manchester United's all about, breaking wage structures even more, signing the big superstars or maintaining somebody that respects the club, respects the production of what they're doing (and) understands the budget?"
Cahill insists that if the United supporters can give Moyes time to succeed, he will reward them.
"For me they've just got to be patient; it's the biggest job in the world and they're going to demand things straight away but their class of the players is already there," Cahill added.