11 Juni 2011 Killswitch Engage Killswitch Engage  is an American  metalcore  band from  Westfield, Massachusetts , formed in 1999 after the disbandment of Overcast and  Aftershock . Killswitch Engage's current lineup consists of vocalist  Howard Jones , bassist  Mike D'Antonio , guitarists  Joel Stroetzel  and  Adam Dutkiewicz , and drummer  Justin