Complex sentence: Before joining Brown Brigade, Coles was a member of Canadian pop punk band Cauterize from 2005, to 2007 when it disbanded; he played his last show with Cauterize on October 19,2007 while already an member of Brown Brigade.
Split into simpler sentences: Before joining Brown Brigade, Coles was a member of Canadian pop punk band Cauterize between the years 2005--2007, until the disbandment of the band. Coles played his last show with Cauterize on October 19,2007 while already an official member of Brown Brigade.