The Irish defender has moved south of Glasgow in search of regular first team football with the League One side
Celtic defender Eoghan O'Connell has joined Walsall on loan until the end of the season.
O'Connell has made just seven appearances for Brendan Rodgers side this season, but featured in the Champions League, making an appearance against Barcelona.
The Republic of Ireland Under-21 international will now look to establish himself at Walsall, who are currently 14th in League One.
"I’m really looking forward to getting started," O’Connell told the club's official website. "I heard about the interest last week and it took perhaps a little longer to get done than we would have hoped.