Jon Dette lives in San Francisco and is left handed. He officially joined the New York-based metal band Havochate in April 2004, recorded the follow-up to 2003 album 'This Violent Earth' and has since left the band. Jon Dette has been replaced by a returning Ovie Rodriguez.
Previously Jon Dette played in Evildead and Testament. When Dette tried out for the latter band in 1994, he competed against twenty other drummers.
Jon Dette also joined Slayer for the time Paul Bostaph quit, which was only a few months in 1996-1997. He left Slayer when Paul Bostaph was asked to rejoin the band.