Justin first met Tool in New York, and kept in touch with band members for a couple of years until Justin's band in England "Peach", did a tour with Tool in Europe in 1994.When original bassist Paul D'Amour left to play guitar in Lusk, Tool gave Justin a call.At first Justin turned them down. Peach had broken up about six months before, and he was forming a new band with the guitarist. Justin felt very loyal to his friend who he'd played with since he was 14. But then decided he couldn't deny himself the opportunity.Justin flew to the US, auditioned, and got the job. He beat out some stiff competition,which included Filter's Frank Cavanagh, KYUSS's Scott Reeder, Zaum's Marko Fox (who did the voice on Die Eier von Satan), and Pigmy Love Circus's E. Shepherd Stevenson.
Justin adds a different sound to Tool because he is a heavy bass player and added a lower end to the overall sound of the band.