Jonathan Voltzok, also credited as Yonatan Voltzok, was born in Tel Aviv in 1983 and started on trombone and euphonium at 6. His mentor was the late Amit Golan. By 15 he was already working professionally alongside major names on the Israeli scene. He earned his bachelor's degree at the New School in New York and has since shared the bandstand with Slide Hampton, James Moody, the Dizzy Gillespie All-Star Band, Jimmy Heath, Paquito D'Rivera, Junior Mance, Roy Hargrove, Randy Brecker, Frank Wess, Anat Cohen, and bassist Avishai Cohen.

His 2008 debut, More to Come (Kol Yo Records), put several of those names directly on record: Slide Hampton, drummer Ali Jackson, pianist Aaron Goldberg, bassist Barak Mori, and saxophonist Antonio Hart all appear, and the album drew coverage from The Village Voice. That same year he recorded on Avishai Cohen's Sensitive Hours and Anat Cohen's Noir with the Anzic Orchestra, both artists already profiled on jazzprofiles.com.

His second album, Two Spirits Dancing in the Dark, arrived in 2018. He has kept a steady session career throughout, including a 2012 tribute record, Play the Music of Amit Golan (with Eddie Henderson), honoring the mentor who trained him as a teenager, plus dates with the Fat Cat Big Band, KENS, and Nitai Hershkovits.

Voltzok works within a post-bop and hard bop trombone tradition, shaped by years alongside veteran American jazz figures like Slide Hampton and members of the Dizzy Gillespie All-Star Band, as well as big band experience through the Fat Cat Big Band.