J. Mastroianni is an emerging voice in jazz arranging, recognized for their sophisticated harmonic language and inventive reinterpretation of jazz standards. With a background rooted in classical theory and a deep appreciation for the big band tradition, Mastroianni's two arrangements in the band library catalog showcase a knack for crafting engaging and challenging charts that push ensembles while honoring the original compositions. Their work contributes to the evolving landscape of contemporary jazz repertoire.