Mazis, who trialled with the Hoops in October last year, joins the club of fellow Canberran Tom Rogic.

The attacking midfielder and Rogic share the same management and have both been mentored by former Socceroo Andy Bernal.

Mazis joins Celtic from Belconnen United and is now eligible to play for his new club after receiving his visa clearance.

“It was unbelievable when I got the call to say Celtic were offering me a contract," the 17-year-old told the Celtic website.

"It’s always been my dream to play football at the highest level and Celtic are a massive club so I’m over the moon with this opportunity. Training has been unbelievable so far. I’ve loved every minute of it and I can’t wait to play some games.

“All the boys have been great with me so I’m settling in well and coaches have been fantastic, I couldn’t ask for anything more.

"My dream is to one day play for the first team but obviously right now I’m only concentrating on just getting settled and getting game time in the Development Squad. I need to find my feet a bit and take things a step at a time."

Mazis debuted in the National Premier League in the ACT as a 16-year-old. Last year he scored two goals in 16 games for Belconnen.