], Sonenberg received a degree in Theater and Political Science at Tufts University[2] and a juris doctor at Harvard Law School.

There, he represented Broadway and Off-Broadway musical productions including Hair, Godspell and Cabaret.

Sonenberg then established his own law firm and began DAS Communications Ltd., a full-service management company located in New York and Los Angeles for artists in the entertainment industry.

Other clients of DAS Communications have included Jim Steinman, Jimmy Cliff, Southside Johnny, Jimmy Iovine, BeBe & CeCe Winans, Keith Thomas, The Spin Doctors, Joan Osborne, Spacehog, The Fugees including Lauryn Hill, The Black Eyed Peas, John Legend, Kesha, Saraya and Indiggo.

[citation needed] DAS Ventures Ltd., another of the DAS family of companies, entered into agreements with Yoko Ono and the Estate of John Lennon in 1997, which culminated in the launch of The John Lennon Songwriting Contest[citation needed].