The centre-back will officially join the Oakwell outfit on July 1. He most recently spent time in Scotland with St Mirren, making 84 appearances with the club.

He played 17 times and scored one goal for St Mirren last term as the club finished ninth in the Scottish Premiership.

The Irishman was born in Blarney, just north of Cork and began his career with Cork City, featuring 88 times which included appearances in the Europa and Champions League.

NEW ARRIVAL: Conor McCarthy has signed a three-year deal at Barnsley. Picture: Getty Images.

“Now that it’s all signed, sealed and delivered, it’s a great feeling," said McCarthy.

“You only have to take one look around at the stadium, the facilities that this club has, and I needed no second invitation to sign for a massive club like this.”

Chief executive officer of Barnsley, Khaled El-Ahmad, added: “We are happy to welcome Conor, who is a versatile defender with a strong character and leadership qualities to Oakwell as we add additional quality to our defensive unit."

St Mirren centre-back Conor McCarthy joins Barnsley on three-year deal