Having just days earlier re-signed teammate and former Socceroo Rhys Williams to a new deal, the club’s hierarchy moved to tie down Duncan after just 17 league appearances for the team he joined from Newcastle Jets last July.
The gloveman began his career with Jets before moving to Perth, onto Randers in Denmark and then back to Newcastle.
He has started all but one of the ninth-placed Al-Qadsiyah’s 18 league games so far this season, and is hoping to use his move to the burgeoning Pro League as a springboard to Socceroos selection.
Coach Graham Arnold watched him in person on a scouting trip to the Middle East last year, with Australia keeper Brad Jones also based there (with second placed Al-Nasser), along with defender Matt Jurman (Al-Ittihad).
While a regular at Under-20 and Under-23 level for his country, Duncan has thus far found himself up against it to force his way into the Socceroos equation.
Arnold is spoilt for choice in goal with Mat Ryan ruling the roost, and Mitch Langerak, Danny Vukovic and Jones all jostling for position behind him.
“Jack’s had a very good start to his inaugural season in Saudi and (the extension) is well deserved,” said Duncan’s agent former NSL player and Lebanon international Buddy Farrah.
“He just keeps developing his game in a tough league with potent strikers in just about every side.”
