At a young age, his father had him play percussion in the orchestra of the National Theatre, Warsaw to gain experience.
[3] In 1927 he re-orchestrated Arthur Sullivan's music for "The Mikado" for Erik Charell's re-staging as an operetta-revue in Berlin's Grosses Schauspielhaus.
[1] His first violin concerto made a major impression on the 1929 International Society for Contemporary Music concert.
Music critic Henry Prunieres remarked "The violin concerto...[was] delicate, sensitive with a fine feeling for orchestral resource.
[9] Jerzy Fitelberg's manuscripts are housed in the Music Division of The New York Public Library for the Performing Arts.