A. Rissanen is a contemporary Finnish jazz arranger and composer, celebrated for their innovative contributions to modern big band music. Emerging in the early 2000s, Rissanen's distinctive style blends intricate harmonic language with vibrant rhythmic textures, drawing inspiration from both traditional jazz and contemporary classical idioms. Their work with the UMO Helsinki Jazz Orchestra and various European ensembles has garnered critical acclaim, showcasing a knack for crafting dynamic and challenging arrangements that push the boundaries of the jazz orchestra. Rissanen's compositions are frequently performed internationally, solidifying their reputation as a significant voice in 21st-century jazz arranging.