A Renaissance man of the musical world, Leonard Bernstein (1918-1990) was a composer, conductor, writer, and also accomplished pianist. He is perhaps best known for his work from West Side Story and his time with the New York Philharmonic (quick tempi and all!). While his compositional output is tremendous, his work in the film genre is rather limited, with On the Waterfront as one such original film.
For brass instruments in a concert setting, Bernstein wrote Brass Music, which consists of five movements, the first four being for trumpet, horn, trombone, and tuba (respectively) with piano, and the final movement a brass quartet entitled Fanfare for Bima. Here is a short clip of the work: