 After his collaboration with Dire Straits, Sonni contributed to other musicians' works but ended his professional musical career when his twin daughters, Caitlin & Nadine, 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.He was instrumental in the development and launch of POD - which he named and gave the product its legendary shape.