The Lilywhites have added to their squad ahead of the 2013 season with the signing of the Bray Wanderers defender
A left back by trade, Massey made over 100 appearances in the Airtricity Premier Division for the Seagulls. The 24-year-old defender began his career with Bray Wanderers where he made his debut in 2008 and becomes Stephen Kenny's seventh signing since taking over the reins at Oriel Park in November.
Massey joins Andy Boyle, John Dillon, Patrick Hoban and Keith Ward as a new signing for the Lilywhites, while John Mountney and Eoghan Osbourne have agreed to extend their contracts with the club.
Former Shamrock Rovers boss Stephen Kenny will be hoping to make further additions to his squad ahead of the forthcoming season after the departure of defender Derek Foran to Shamrock Rovers and forward Michael Rafter to Derry City.