Portsmouth keeper David James is now fully fit and back in England's squad for the two final World Cup qualifiers, against the Ukraine on Saturday and Belarus next Wednesday, but Miklosko believes Green has the edge in the race to be Fabio Capello's first choice.
"I would say Rob is the best keeper that I have ever worked with," Miklosko told the London Evening Standard.
"He has improved massively since he joined West Ham from Norwich and he's the perfect age for an international keeper."
He added: "Rob will be 30 by the time the World Cup comes around and that is a great age for a goalkeeper. I have worked also with David James, of course, and he is a great athlete.
"It is difficult to separate them since they are both top-class goalkeepers but Rob would perhaps just have the edge because he is the younger man and because, since he went into the England team, he has never let them down.
"When Peter Shilton played in his last World Cup he was around the 40 mark and the agility wasn't there.
"Another example was Dino Zoff, a great Italian goalkeeper in his prime but who made mistakes in his final major tournament because he wasn't as agile as he had been."