Portadown will officially confirm the signing of Gary Twigg after the striker plays his last game for Shamrock Rovers on Friday night.
Scotsman Twigg will bring the curtain down on his Rovers career when they complete their Airtricity League campaign away to Sligo Rovers on Friday night, with the Ports set to announce that he is moving to Shamrock Park immediately afterwards.
Portadown manager Ronnie McFall has spent the last six months trying to sign a high-quality replacement for Matthew Tipton, who left for Linfield in May.
And he could hardly have done any better, with Twigg — who was brought to Tallaght by Northern Ireland manager Michael O'Neill shortly after he took charge of Shamrock Rovers — regarded as one of the most prolific strikers in Ireland.
Twigg was voted as the PFAI Player of the Year in 2009 before his goals helped fire Rovers to back-to-back league titles in 2010 and 2011.
The 28-year-old hitman will train with the Shamrock Park side for the next two months in preparation for his Danske Bank Premiership debut, which is scheduled for when the Ports face Crusaders at Seaview on New Year's Day.
Just last week Twigg told Rovers that he would not be accepting the offer of a new contract as he wants to play closer to his home in Co Antrim and Portadown have won the race to sign the player, who had also attracted interest from Ballymena United and Linfield as well as Rovers' Airtricity League |rivals Derry City.