A proven Hyundai A-League performer, the 20-year-old spent two seasons at the Fury, playing 27 games for the team from Townsville.
Postecoglou said Hingert's proven record at Hyundai A-League level and his versatility were both important factors in his signing.
"We needed another defensive player and Jack can play in two or three positions across the backline," Postecoglou said.
"We really needed that versatility for the way our squad will be structured for this season.
"In his time at North Queensland he did well in difficult circumstances and we hope in our environment he can take his game to another level."