Jesse David Leach is an American musician, best known as the lead vocalist of the metalcore band Killswitch Engage. He is also a vocalist for Times of Grace and The Weapon. Leach co-founded Killswitch Engage in 1999, but left the band in 2002; in February 2012, he rejoined the group following the departure of vocalist Howard Jones. He currently resides in the Catskill Mountains in New York.