K. Berger is a contemporary American jazz arranger and composer, renowned for their innovative contributions to large ensemble jazz. Active since the early 2000s, Berger's style is characterized by intricate harmonic voicings, rhythmic complexity, and a sophisticated blend of modern jazz with classical influences. Their work has been featured by prominent university jazz orchestras and professional big bands across the United States. Notable arrangements include reinterpretations of standard repertoire, as well as original compositions like "Urban Nocturne" and "Chromatic Drift," which showcase their unique approach to orchestral jazz. Berger's arrangements are celebrated for their challenging yet rewarding charts, significantly expanding the modern jazz band repertoire.