Brady won 72 caps for his country in a 16 year career and will be a helpful link between management and the players as he speaks Italian.
He said
I was a senior international player for 16 years from when I was 18 until I was 34 and I am really looking forward to working with Giovanni Trapattoni and trying to qualify for the World Cup finals.
"I had a meeting with Giovanni Trapattoni last week during which he clarified my role and I am very happy with what he expects of me.
"He wants me to work with the players, which is of most interest to me, and also to be on the bench and in the dressing room during games. He sees me as someone he can talk to along with Marco Tardelli.
"I will also be part of the scouting network and will be going to as many games as I can to monitor the players in the squad and also track the progress of up and coming players."