A. Dorfman, an American jazz arranger active primarily during the mid-20th century, was a significant, albeit often uncredited, contributor to the big band sound. Known for his sophisticated harmonic voicings and meticulous orchestration, Dorfman's arrangements blended traditional swing idioms with nascent bebop sensibilities. He frequently collaborated with prominent bandleaders of the era, crafting intricate charts that showcased soloists while maintaining a cohesive ensemble sound. His work is particularly noted for its innovative use of brass sections and its ability to elevate popular tunes into complex jazz statements, enriching the repertoire of countless jazz orchestras.