Deborah Humble performs in Handel's Messiah.

Mezzo-Soprano Deborah Humble is one of Australia's most successful international artists. She began her musical education in Adelaide, gaining a Bachelor of Music Performance and continued her studies in Melbourne, completing a Master of Music and Diplomas of Arts and Education.

In 2004, Deborah was awarded the prestigious Dame Joan Sutherland Scholarship. The following year, she became a Principal Mezzo with the State Opera of Hamburg. Her many roles for the company included Zenobia (Radamisto), Bradamante (Alcina), Hansel (Hansel and Gretel), Page (Salome), Suzuki (Madame Butterfly), Olga (Eugene Onegin) and Malik for the German premiere of Henze's L'Upupa.

But it was for her Wagner roles in Hamburg's Ring Cycle that she received international acclaim. Conducted by Simone Young and directed by Claus Guth, Deborah began with Erda in Das Rheingold in 2008 and went on to sing Schwertleite in Die Walküre, Erda in Siegfried and both 1st Norn and Waltraute in Götterdämmerung. She recorded these roles for the Oehms record label and, in early 2011, repeated the roles in two complete cycles.

In 2008, Deborah was a finalist in the International Wagner Competition held in Seattle.

Her international engagements include appearances with Edinburgh Festival, Festival d'Aix-en-Provence, Salzburg Easter Festival, Hong Kong Philharmonic Orchestra, Singapore Lyric Opera, Seattle Symphony, Auckland Philharmonia Orchestra, Stuttgart Philharmonic, Hamburg Philharmonic, London Mozart Players, British Youth Opera and the Théâtre du Châtelet in Paris – in works as diverse as Handel's Messiah and Verdi's Requiem. Closer to home, she has performed with the State Opera of South Australia, Opera Queensland, the Sydney, Melbourne, Queensland and Tasmanian Symphony Orchestras and the Adelaide and Brisbane Festivals.

In 2013/14, she sang further Ring Cycles in Hamburg, Halle, Melbourne and Ludwigshafen, sang Catherine in Honegger's Jean d'Arc du Boucher in Lisbon, Amneris in Aida for Opera Australia, Elijah with the Sydney Symphony, Mahler's Symphony No. 3 with the Queensland Symphony and Wesendonck Lieder in New Zealand.

Most recently, Deborah Humble has appeared in Strauss' Elektra and Honegger's Jeanne d'Arc au Boucher in Hamburg, Das Rheingold, Siegfried and Beethoven's Symphony No. 9 in Hong Kong, Siegfried in Boston, Mahler's Symphony No. 8 in Singapore, Bruni's Symphony No. 1 (Ringparabel) in Minsk, Parsifal and Verdi's Requiem in the UK, Bluebeard's Castle and Elgar's The Kingdom in Melbourne, Mozart's Requiem in Brisbane, Tristan und Isolde in Mexico City, Der fliegende Holländer in Lille and Peter Grimes for the Sydney Symphony.

In 2020, she returned to Opera Australia as Waltraute in Opera Australia's Der Ring des Nibelungen and appeared in concert with the Queensland Symphony and Sydney Philharmonia.