Cassandra Seidemann

Australian/German mezzo soprano Cassandra Seidemann has featured extensively on both stage and screen. She is a favourite with audiences having sung throughout Australia, Asia and New Zealand. Recent highlights included Rossweisse in the Singapore premiere of Die Walküre, appearances in Opera Queensland’s productions of A Flow’ring Tree, Tosca and Orfeo and concert appearances in Australia, New Zealand and Papua New Guinea. In 2022, she sang Bradamante in National Opera’s production of Alcina and was soloist with the Queensland Pops Orchestra in their New Year’s Eve Gala Concerts. 2023 solo appearances included those with Queensland Baroque, Festival of Voices Hobart and Messiah with the Tasmanian Symphony Orchestra. She returned to the TSO in 2024 for Mozart’s Requiem; in 2025, she appears as soloist with the Sydney and Queensland Symphony Orchestras.

In 2017, she was soloist for Opera Under the Stars in Broome, Western Australia and in Handel’s Messiah for Christchurch City Choir. Cassandra returned to Opera Queensland in 2018 as Olga in Graeme Murphy’s new production of The Merry Widow and starred in a Chinese New Year gala concert at the Sydney Opera House.

Cassandra graduated with honours from The University of Queensland with a Bachelor of Music (Opera Performance). There she performed the title role in Dido and Aeneas as well as Hansel in Hansel & Gretel.

She then 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 and Kate Pinkerton and Suzuki in Madama Butterfly.

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.

On screen, she has been featured in the Lord Mayor's Carols in the City, numerous television commercials, was a featured artist at the Carols in the Domain 2015 to 2020 and, most recently, played the role of Mary in the short film Jade.

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 taken the alto solos in Handel’s Messiah and Dixit Dominus, Vivaldi’s Gloria, Schubert’s Mass in A Major, Bach’s Magnificat and Mozart’s Requiem and Coronation Mass.

Cassandra was a grant recipient of The Joan Sutherland Society, a finalist in the Opera Foundation Australia German Opera Scholarship and a finalist in the Opera Foundation Australia Lady Fairfax Scholarship.