Green was approached in 1997 by A&R rep Mike Gitter from Roadrunner Records. He told him that Sepultura frontman Max Cavalera had left the band in 1996 and they were searching for a new vocalist. He suggested Green try out for the position. Sepultura had recorded one song with no vocals to see what people all around the world could come up with. Green got a hold of the tape from Gitter and he recorded his idea for the song "Choke" and sent it to Brazil. A month later he received a phone call from Sepultura's drummer, Igor Cavalera. He was then asked to fly down to São Paulo, Brazil to meet everyone and audition for the position. Green flew out a week later and met everyone and auditioned for two weeks. Green was asked to come back to Brazil to start recording his first album, "Against", with Sepultura.