 Hamburger worked as coach for the English Chamber Group, preparing for the television performance of Benjamin Britten's "The Turn of the Screw" and touring with the company.He was also coach at Glyndebourne Opera, working on "Fidelio", "Alceste", "The Rake’s Progress", "Arlecchino", many Rossini operas and all the Mozart operas.He coached the singers in Erich Leinsdorf's recording of "Die Walküre" with Birgit Nilsson.