J. Riis is a contemporary jazz arranger whose distinctive voice enriches the modern big band sound. With a background steeped in classical harmony and a deep appreciation for the jazz tradition, Riis crafts arrangements that are both intellectually stimulating and viscerally engaging. Their two cataloged works showcase a sophisticated interplay of brass and reeds, demonstrating a keen ear for reharmonization and rhythmic complexity. Riis's contributions expand the repertoire with fresh perspectives, solidifying their place as an emerging force in jazz orchestration.