Some highlights from past seasons include Barbiere (Glimmerglass Opera), Der Rosenkavalier (Scottish Opera), Götterdämmerung (Cologne), the title role in Bloch’s Macbeth (Frankfurt), A Midsummer Night's Dream, Die Frau ohne Schatten and Parsifal (Hamburg), Mahler's Symphony No. 8 (Madrid), Der fliegende Holländer (Seattle Opera), Tannhäuser and Nabucco (Opera Australia), Der Rosenkavalier, Tosca, Carmen, Don Carlo and Barbiere (Welsh National Opera), Salome (Opera North and Hamburg State Opera) and Aida (Montreal).

The Australian born bass-baritone has performed with all of Australia's major opera companies in productions of Die Entführung aus dem Serail, Il barbiere di Siviglia, Die Zauberflöte, Aïda, Faust, La bohème, Samson et Dalila, Eugene Onegin, Simon Boccanegra, Les contes d'Hoffmann, Tristan und Isolde, Tosca, Carmen and Salome.

In 1994, Daniel Sumegi made his Italian debut in Der Freischütz, and in recital, for the Teatro Giuseppe Verdi of Trieste, and, also in 1994, while participating in the Adler Fellowship programme, he sang the title role in he North American premiere of Sir Michael Tippett's King Priam for the San Francisco Opera Center. In January 1995, he sang once again in Italy, at the Teatro Regio di Torino in A Midsummer Night's Dream followed by seasons of Faust and Macbeth for Holland's National Reisopera, and in June 1996 he returned to the San Francisco Opera for a centennial production of La bohème.

Winner of the 1987 Melbourne Sun Aria and 1989 McDonalds Aria, Sumegi was also a winner of the 1994 New York Metropolitan Opera Contest and the 1995 Placido Domingo Operalia. He has worked under noted conductors such as Valery Gergiev, Sir Simon Rattle, Jeffrey Tate, Sir Andrew Davis, Sir Charles Mackerras, Carlo Rizzi, Simone Young, Nello Santi, Donnald Runnicles Sebastian Weigle, Edo de Waart, Richard Hickox and Placido Domingo.

Daniel Sumegi appears on CD in Beatrice di Tenda and on video in the San Francisco Opera Production of Capriccio.