"Pre-season's always tough but I'm fortunate to have these next few months to get to know the club and my teammates."
He was contacted by the Brumbies' coaches during this year's NPC and he was keen to ply his trade across the ditch for a year.
"Playing for an Australian franchise doesn't bother me. I am grateful for the opportunity. The Brumbies are a good side and I am keen to contribute where I can."
Playing alongside Debreczeni would add to the excitement, he said.
Debreczeni recently returned to Australia after finishing up his time with the Hino Red Dolphins in Japan's Top League and has been lining out for West Harbour in Sydney's Shute Shield.
He previously played for the Melbourne Rebels and the Chiefs.
Brumbies head coach Stephen Larkham reportedly said Tua was a good young player and within the franchise's programme, he could make great strides along with their current group of centres.
Tua, who has made 52 appearances for Northland, will return to the province for next year's NPC.
Other Northland players on Super Rugby contracts are Rob Rush, Ofa Tu'ungafasi, Sam Nock and Tom Robinson (Blues), Rivez Reihana (Chiefs) and Josh Moorby (Hurricanes).