Yomiuri Nippon Symphony Orchestra
Siirala is and was invited to play with orchestras like Deutsches Symphonie-Orchester Berlin, Bamberger Symphoniker, Bochumer Symphoniker, hr-sinfonieorchester Frankfurt, Museumsorchester Frankfurt, SWR Sinfonieorchester Freiburg und Baden-Baden, NDR Radiophilharmonie Hannover, Gürzenich-Orchester Köln, WDR Sinfonieorchester Köln, Staatsphilharmonie Rheinland-Pfalz, Tonhalle-Orchester Zürich, Wiener Symphoniker, Tonkünstlerorchester Wien, Orchestre National de Belgique, Orchestre National de Lille, City of Birmingham Symphony, Liverpool Philharmonic, BBC Symphony London, Royal Scottish National Orchestra, Irish National Symphony, Orchestra del Maggio Musicale Fiorentino, Residentie Orkest Den Haag, Iceland Symphony Orchestra, Swedish National Orchestra, Swedish Radio Symphony, Finnish Radio Symphony Orchestra, Sinfonia Varsovia, St. Petersburger Symphoniker, Estonian National Symphony, Detroit Symphony, New Jersey Symphony, Singapore Symphony Orchestra, Tokyo Metropolitan Symphony Orchestra, Hiroshima Symphony Orchestra, New Japan Philharmonic Orchestra, Yomiuri Nippon Symphony Orchestra as well as with the orchestras of Melbourne and Queensland.