Killas, who has turned out for the Cypriot Under-21 side this year, has signed a one-year contract after leaving relegated Atromitos Yeroskipou.
The 21-year-old had been hoping for a return to the PSL after making his debut for Mpumalanga Black Aces in the 2010/11 season.
But he will instead continue to campaign in Cyprus, where he is likely to be used in the centre of defence, though he can also operate as a right-back or a defensive midfielder.
Killas is a product of Harold ‘Jazzy Queen’ Legodi’s Africa Sport Academy, playing in their Under-17 side as a 13-year-old. He later moved on to Balfour Park and then BidBoys, the reserve side of Bidvest Wits.
There he played in the 2008 Engen Under-17 Cup and was named Defender of the Tournament, and also made the Soweto SAFA Select team.
He was invited by Mpumalanga Black Aces to train with them in 2010 and was offered a professional contract after just one session.
But following their relegation from the top-flight, he was spotted in Cyprus during a kick-about while on holiday spent last season with Atromitos.