With the help of Deehan, City managed to beat off stiff competition for the much sought-after defender, with a number of clubs tabling offers for the promising 19-year old.
Speaking to the Lincolnshire Echo today, Green stated: "John has spoken to me in depth about his plans for the club in the future and it's very exciting.
"He's showed me around the training facility, the stadium and explained to me where he wants to take the club in the next few years.
"With the club looking destined for promotion, it was an easy choice to make and I'm excited by what the future holds.
The former
"Obviously I know Ryan from Villa and have seen how well he has done here and I'd like to think I could replicate that success," Green continued.
"The Premiership is becoming increasingly harder for youngsters because the chances of a game are becoming slimmer.
"So if you want to make a name for yourself it may be that many more young players might have to take their chances by playing lower down the football ladder.
"I'm personally looking forward to the challenge and hopefully showing the fans what I can do."
Green, who was has been an ever-present for Villa's reserve team this year is hoping to make his league debut in this weekend's game against Darren Ferguson's Peterborough United.
"I would love to play some part in the
"Hopefully we can notch up a win because we probably should have won the game against Bury but we can put that right on Saturday."