Aron joins us after leaving Fulham under 23s back in July.
He began his career at Bristol City, playing within their youth set-up, before moving to West London in 2016.
The defender gained National League experience last season when he made a loan move to Maidstone United; making 14 appearances in the 2018/19 season.
Davies has made six EFL Trophy and over 50 Premier League 2 appearances so far in his career.
Maidenhead United Chief Scout, Lee Devonshire, explained:
“Aron comes from a great background and another ex Fulham player who we seem to have a few of now.”
“We know of his ability from his time at Maidstone United at the end of last season and he has really impressed us all with his pre-season performances.”
“He has shown his versatility as he is comfortable in midfield and centre-back and we feel he will be a welcome addition to the group, and a big plus for us moving forward.”