Ukrainian bass-baritone Oleksii Zasiadko graduated from the Odesa National Music Academy and the Guildhall School of Music & Drama (Advanced Certificate, 2024).

He toured with the Ellen Kent Opera Company, performing in Carmen, Tosca, and Madama Butterfly across the UK and Ireland.

Since 2023, he has been a soloist in the Royal Opera House’s Songs for Ukraine project, performing at Bradford Cathedral, Southwark Cathedral, Paul Hamlyn Hall, Farm Street Church, St Paul’s Church, Covent Garden, and other prestigious venues across the UK.

In 2024, at the Guildhall School of Music & Drama, his Mozart repertoire included the Speaker, Sarastro, Priest, and Second Armed Man in Die Zauberflöte.

In 2025, he performed the role of Tom in Verdi’s Un Ballo in Maschera (Brent Opera), Betto in Puccini’s Gianni Schicchi (St Albans Chamber Opera), and Papageno in Mozart’s Die Zauberflöte (Opera Greenwich). He also appeared in the world premiere of Kevin Rodgers’ The Murderous Delusions of Gavrilo K at Tête à Tête: The Opera Festival.

In 2026, he performed Collatinus in Britten’s The Rape of Lucretia (Hampstead Garden Opera), reprised The Murderous Delusions of Gavrilo K at the Grimeborn Opera Festival at the Arcola Theatre, and sang the role of Simone in Puccini’s Gianni Schicchi with Kleine Opera at St Mary’s Church, Islington.

His concert repertoire includes Martines’ Missa Solemnis, Mozart’s Coronation Mass, Rossini’s Petite Messe Solennelle, Handel’s Messiah, Duruflé’s Requiem, and numerous other orchestral, choral, and sacred works, performed at venues across the UK.