Olivier Abbeloos was born in Aalst, Belgium on January 18th 1969. He was always interested in music and started to learn how to DJ at age of 13 when he received a DJ set-up from his parents. He started producing at the age of 17 when he amused himself by making mega-mixes on two track recorders
His first project was L&O Even Now, but wasn’t credited on the release. His first project together with Patrick De Meyer was The Beat Machine. His first successful project was Quadrophonia, together with Lucien Foort. T99 was first started by Patrick De Meyer, releasing three solo works. Patrick later heard Abbeloos working on a track called Anasthasia and proposed Abbeloos to release it as T99. Abbeloos agreed if from that point on they were a group by the name of T99. They later went on together to produce their only album Children Of Chaos.

His brother-in-law is Olivier Pieters. He also worked in the imports section of the record shop, Target Records.