Hy Dreitzer began his drum corps career playing soprano horn with the Ketchem-Hennesy Post corps in Coney Island, New York, in the 1930s. He then played French horn with the Ruoff Post Drum Corps, of Queens, NY. He marched with Con Edison of New York City, playing lead soprano, then in 1952 joined the horn line of the New York Skyliners, playing soprano and French horn. He was the sole brass arranger for the Skyliners for more than 30 years, year after year creating new sounds and exploring new areas. He was one of the first drum and bugle corps brass arrangers to make the transition from military music to include classical music in the field show repertoire. He also taught many highly-regarded junior corps, including St. Joseph’s of Newark, St. Vincent’s of Bayonne, St. Andrew’s Bridgemen, Garfield Cadets, St. Ignatius All-Girl Corps, St. Rocco’s, and St. Rita’s Brassmen. He arranged music for many other corps, including Guelph Royalaires, Canada’s six-time senior national champions from 1959 to 1964.