Sam Wallace, 22, now lives on the Gold Coast but graduated from McCarthy in 2008.
He will enter the house later this week.
Sam now works at Koi Dining and Lounge Bar in Surfer's Paradise - a stones throw from the Big Brother compound in Dreamworld - so the show's producers didn't have to stray very far to find him.
According to Sam's social networking pages he loves motorcycles and girls in bikinis.
His appearance in the house comes a little over a week after the first intruder for 2012, Ava, entered the house.
Entertainment reporters were quick to suggest yesterday that Sam's introduction to the house, and Ava's last week, were ploys to try and keep the show's ratings up because rival shows Channel 7's X Factor would be entering its first live round of performances.

