Killswitch Engage is an American metalcore band formed in 1999 in Westfield, Massachusetts. Known for their blend of melodic metalcore and powerful vocals, the band has become a prominent name in the metal scene. Their music often features a mix of heavy riffs, melodic passages, and themes of personal struggle and resilience.

Key Members include Jesse Leach (vocals), Adam Dutkiewicz (guitar, producer), Joel Stroetzel (guitar), Mike D'Antonio (bass), Justin Foley (drums). Notable Albums include Alive or Just Breathing (2002), The End of Heartache (2004), As Daylight Dies (2006), Disarm the Descent (2013) and Atonement (2019). Killswitch Engage is known for their energetic live performances and their influence on the metalcore genre. They continue to release new music and tour internationally.