opera | Metropolitan Opera | Sundance Film Festival | Royal Opera House | Cannes Film Festival | Sydney Opera House | Vienna State Opera | Toronto International Film Festival | Glastonbury Festival | San Francisco Opera | Edinburgh Festival | Royal Festival Hall | New York City Opera | Venice Film Festival | The Phantom of the Opera (1986 musical) | festival | The Threepenny Opera | Opera | Tribeca Film Festival | Salzburg Festival | Doctors (soap opera) | Montreux Jazz Festival | Falstaff (opera) | Paris Opera | Royal Swedish Opera | Opera Australia | Edinburgh Festival Fringe | Lyric Opera of Chicago | Boris Godunov (opera) | The Beggar's Opera |
Appearances outside Sweden included Bayreuth (Kurwenal in Tristan und Isolde, Herald in Lohengrin and Donner in Rheingold), the Edinburgh Festival in 1959 and 1974), Savonlinna in 1989 (Henrik in Singoalla by Gunnar de Frumerie), Hamburg, the Royal Opera House Covent Garden (1960, 1981), Montreal (1967), Moscow, Munich and Oslo.
His best-known works include his children's operas commissioned by the Finnish National Opera and the Savonlinna Opera Festival: Gaia, Heinähattu, Quiltshoe and the Big Bang ("Vilttitossu ja suuri pamau") and The Seven Dog Brothers ("Seitsemän koiraveljestä").
In 1991, he sang the role of Lucentio in Hermann Goetz's Der Widerspänstigen Zähmung at the Wexford Festival Opera, toured throughout Japan, and portrayed the role of Don Ottavio in Wolfgang Amadeus Mozart's Don Giovanni at the Savonlinna Opera Festival in Finland.
His father is Raimo Sirkiä, a Finnish operatic tenor who sang mainly in Germany and was principal tenor at the Finnish National Opera, former artistic director of the Savonlinna Opera Festival (2002-2007) and recipient of the Order of the Lion of Finland – Pro Finlandia Medal.