Starting with his first album The Language of Truth in 1991, Joseph has six albums, one single, and one soundtrack to his credit, and has focused on live performance, composing, broadcasting and teaching. He performed at the 2003 London Jazz Festival and also hosts several radio shows on BBC Radio 3, including Jazz Line-up and Jazz Legends. He has also made two jazz television series for Meridian, a jazz series for Sky TV's Artsworld Channel and the documentary A Festival of Jazz Piano (2006) for BBC Television in Wales directed by Celia Lowenstein.
In September 2010, Joseph was interviewed by Bruce Lindsay, a jazz critic from Allaboutjazz, who wrote: "Julian Joseph is something of a jazz master of all trades."
Julian is also a trustee and vice-president of the National Youth Jazz Collective.