Killswitch Engage is an American metalcore band from Westfield, Massachusetts, formed in 1999. Founded in the following disbandment of the bands Overcast and Aftershock. Killswitch Engage's lineup consists of vocalist Howard Jones, bassist Mike D'Antonio, guitarists Joel Stroetzel and Adam Dutkiewicz, and drummer Justin Foley, the band has released five studio albums and one DVD.
Killswitch Engage rose to fame with its 2004 release The End of Heartache, which peaked at number 21 on the Billboard 200, and was certified gold in December 2007 for over 500,000 shipments in the United States. The title track, "The End of Heartache", was nominated for a Grammy Award in 2005, and a live DVD titled (Set This) World Ablaze was released in 2005. Killswitch Engage have attended festivals such as Wacken Open Air, Reading and Leeds Festivals, Ozzfest, Download Festival, Rock on the Range, Mayhem Festival, and the Australian Soundwave Festival. The band released their self-titled studio album, on June 30, 2009. On the same day it was released, their previous album As Daylight Dies was certified gold in the United States. This means, along with The End of Heartache going gold as well, that their self-titled fifth album has offically sold over 1 million albums in the United States. MTV has referred to Killswitch Engage as "one of the founders of metalcore".