Sonni had been working at the iconic New York City guitar shop Rudy’s Music Stop in the 1970s when he first met the band’s co-founders, David and Mark Knopfler.
Mark Knopfler, Jack Sonni and Sting at Live Aid at Wembley Stadium in 1985. Photo / Getty Images
He played alongside the group at 1985′s Live Aid concert at Wembley Stadium and news of his passing, which was posted by the band on Thursday, is prompting a flood of tributes from fans.
Born in Indiana, Pennsylvania, after his collaboration with Dire Straits, Jack went on to contribute to a series of other musicians’ works but ended his professional musical career when his twin daughters were born in 1988.
He began a second career as a marketing executive, first at Seymour Duncan, then Rivera Guitar Amplifiers followed by several years as director of marketing communications at Line 6, a manufacturer of digital technology products for musicians.
In 2001, he became vice-president of marketing communication for Guitar Centre.