Claim: Maynard James Keenan formed A Perfect Circle.

Maynard James Keenan -LRB- born James Herbert Keenan ; April 17 , 1964 -RRB- , 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 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 .   Keenan is also the lead singer of A Perfect Circle . In 2003 , he created Puscifer as a side project and has subsequently released three studio albums . Since rising to fame , Keenan has been noted as being a recluse ; however , he does emerge to support charitable causes .   In addition to his music career , he has performed improvisational sketch comedy and ventured into acting . He currently owns Merkin Vineyards and the associated winery , Caduceus Cellars , which are located in Arizona , where he lives . Among other business ventures , he is a partner in the Los Angeles restaurant Cobras & Matadors , and also owns an organic produce market in Cornville , Arizona , which features a food court and a tasting room for his wines .