Joseph Satriani (born July 15, 1956) is an American instrumental rock guitarist and multi-instrumentalist. Early in his career, Satriani worked as a guitar instructor, with many of his former students achieving fame, such as Steve Vai, Larry LaLonde, Rick Hunolt, Kirk Hammett, Andy Timmons, Charlie Hunter, Kevin Cadogan, and Alex Skolnick; he then went on to have a successful solo music career. He is a 15-time Grammy Award nominee and has sold over 10 million albums, making him the biggest-selling instrumental rock guitarist of all time.In 1988, Satriani was recruited by Mick Jagger as lead guitarist for his first solo tour. Satriani briefly toured with Deep Purple as the guitarist, joining shortly after the departure of Ritchie Blackmore in November 1993. He has worked with a range of guitarists during the G3 tour, which he founded in 1995. Satriani has been the guitarist for the supergroup Chickenfoot since joining the band in 2008.