
Cassandra has established herself as one of Australia's most versatile performers. Adored by audiences, she is often praised for her golden voice, refined delicacy and captivating stage presence.
Recent highlights include appearing as the mezzo soprano soloist in Queensland Ballet's production of Messa Da Requiem, covering the role of the Waitress (Teresa)
in the opera Innocence for Adelaide Festival, joining forces with The Sydney Symphony Orchestra, The Queensland Symphony Orchestra and Tasmania Symphony Orchestra for their concerts The Art of the Score: The Music of Hans Zimmer as well as leading the production of A Woman’s Love and Life for Voxalis Opera.
Cassandra has also appeared as Rossweisse in the Singapore premiere of Die Walküre and Bradamante in National Opera’s production of Alcina. As a soloist, she has appeared with the Queensland Pops Orchestra in their New Year’s Eve Gala Concerts, the Queensland Baroque Orchestra, Festival of Voices Hobart and with the Tasmanian Symphony Orchestra for both Handel's Messiah and Mozart’s Requiem.
Cassandra joined Opera Queensland as part of the Young Artist Program appearing as 2nd Bridesmaid in The Marriage of Figaro and understudying Hansel in Hansel and Gretel. Her affiliation with Opera Queensland has continued to the present day performing and covering the roles of Wowkle in La fanciulla del West, Countessa Ceprano in Rigoletto, Flora in La traviata, Kate Pinkerton and Suzuki in Madama Butterfly and Olga in The Merry Widow.
Other operatic highlights include the title role in Carmen with the Sydney Philharmonia and appearing in concert with Jeff Mills, Derrick May and the Melbourne Symphony Orchestra.
Cassandra's musical theatre appearances include Pitti-Sing in The Mikado, Gwendolen Fairfax in The Importance of Being Ernest, Tessa in The Gondoliers and Laurey in Oklahoma! On the concert stage, she has performed the alto solo in Handel’s Messiah and Dixit Dominus, Vivaldi’s Gloria in D, Schubert’s Mass in A major, Bach’s Magnificat, Mozart’s Requiem and Coronation Mass, Verdi's Messa da Requiem and Rossini's Petite messe solennelle.
Cassandra was a grant recipient of The Joan Sutherland Society, a finalist in the Opera Foundation Australia German Opera Scholarship as well as a Finalist in the Opera Foundation Australia Lady Fairfax Scholarship.
"Cassandra Seidemann brought a refined delicacy to her performance, capable of both intimacy and dramatic surge, with seamless navigation across her range. She truly demonstrates what she is capable of." - Aus. Opera
"Cassandra Seidemann’s mezzo is rich and velvety, with a grounded warmth that carries beautifully" - Stage Buzz Brisbane
"Cassandra Seidemann making her mark as the sultry Olga Kromov" - Stage Whispers.
"Cassandra Seidemann revealed a lovely, warm mezzo soprano voice." - Australian Arts Review.
“Seidemann shines as self-obsessed aristocrat with a subtle gleam of zaniness…tremendous vocal talent…” - Stage Diary.
"Seidemann sang the role (Bradamante) brilliantly". - Canberra Critics Circle.
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