Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Joel Michael Stroetzel (born July 24, 1980) is best known as one of two guitarists from the Massachusetts metalcore band Killswitch Engage. Stroetzel's guitar style is influenced by the bands Slayer, Anthrax, Zakk Wylde, as stated on the World Ablaze DVD. Stroetzel taught guitar lessons at a local music store (Performance Music) while in high school and played in the Westfield High School Jazz Band. Later, Stroetzel attended the Berklee College of Music in Boston, but did not graduate. While at college Stroetzel began playing in the band Aftershock with Adam Dutkiewicz, who would later join him in forming Killswitch Engage.