Julian has been composing and arranging music for many kinds of instrumentations. For example, his project Roundabout featured a one-of-a-kind combination of piano, drums, bass, guitar, saxophone, trumpet, French horn and bassoon. In Ikarai, Julian has combined string quartet writing with drums and piano, exploring a diversity of textures. In his project Caravan, he writes for the unique group of the Arabic Ud, violin, piano and drums.

But he also works for other ensembles. He has arranged for pop artists such as Angelo Boltini, and was awarded with a 10 out of 10 mark in his classical arranging course on the Conservatory of Amsterdam. His arrangement for string quartet of the main theme of Beethoven’s 9th symphony, was part of the exhibition Collecting Europe in the Victorian Albert Museum. He has worked extensively with classical ensembles such as the Netherlands Wind Ensemble and Amsterdam Sinfonietta, for which he made countless arrangements in many different styles ranging from classical to world music and pop.