D. Joly is a contemporary American jazz arranger renowned for their innovative contributions to large ensemble jazz. Active since the early 2000s, Joly's distinctive style blends modern harmonic concepts with a deep appreciation for the swing era, creating intricate and dynamic soundscapes. Their arrangements have been featured by prominent university jazz orchestras and professional big bands across the United States, earning critical acclaim for their sophisticated voicings and rhythmic vitality. Joly's work often reimagines jazz standards and contemporary compositions, showcasing a unique ability to infuse fresh perspectives into established repertoire, significantly enriching the modern jazz band idiom.