Maynard James Keenan (born James Herbert Keenan; April 17, 1964), often referred to by his initials MJK, is an American musician, record producer, winemaker, and actor, best known as the vocalist for Grammy Award-winning American progressive metal band Tool. He is originally from Ohio, but spent his high school and college years in Michigan. After serving in the United States Army in the early 1980s, he attended Kendall College of Art and Design in Grand Rapids. He moved to Los Angeles, California in 1988 to pursue a career in interior design and set construction. Shortly thereafter, he formed the band Tool with Adam Jones.