Izso graduated from the Liszt Academy (1913) with an offer to join the Budapest Opera House (People's Opera ofBudapest) for ayear. Thiswas atremendous distinction for a 24-year-old graduate, and indicated that Izso had clearly established his reputation while at the Liszt Academy. Izso took the position and performed in many cities, including Budapest, Vienna and Berlin. He was acclaimed as a genius by the press and soon was given the position oflead tenor. He served as Chief Cantor at multiple synagogues including Europe's largest (the Great Synagogue of Budapest). He hosted a weekly radio program on Boston's WORL and was heard often on WNAC to popularize Hebrew music. Izso performed hundreds of concerts, was the President of the New England's Cantor's Association,and made multiple recordings of cantorial music. Izso was widely known as a great humanitarian. He supported many organizations through benefit concerts, volunteer efforts andfinancial contributions. These include the Hebrew Aid Immigrant Services (HIAS) where he was chairman of the organization committee, Jewish Workers of Palestine, Jewish National Fund, World Zionist Organization and various schools, hospitalsand relief funds forEastern European Jewry. Izsowas very active in the Boston communi- ty. His professional accomplishments include President of the New England Cantor's Association for several terms and honorary president at the time of his death.