Copland supported his work and Herrmann provided him an introduction to the entertainment media, beginning with the composition of music cues for radio shows in 1935.
In 1956 he composed the score for the World War II drama The Sharkfighters,[1] possibly traveling to Cuba with the film company.
[1] According to Moross, he composed the main title after recalling a walk he took in the flatlands around Albuquerque, New Mexico, during a visit in October 1936, shortly before he moved to Hollywood.
He also orchestrated for other composers, usually uncredited, including such films as Our Town for Copland and The Best Years of Our Lives for Hugo Friedhofer.
Moross's concert works included a sonata for a piano duet and string quartet, and a symphony that was premiered by conductor Sir Thomas Beecham on October 18, 1943 in Seattle, Washington.