The Soprano made her opera debut in the role of Queen of the night in Mozarts Magic Flute in Qatar with the Qatar Philharmonic Orchestra. A fix engagement at Mecklenburgisches Landestheater Neustrelitz for the season 2013 was followed. Since the beginning of season 2013/14 Judith Spiesser worked on her own request as a freelancer and has performed in the role of Germaine in the operetta Tanz auf dem Pulverfass by G. A. Kerker at Stadttheater Gießen and in the role of Rockadirl in the temporary opera Der Brandner Kasper by Hummel at the Gut Immling Festival. In 2014/15 she gave her celebrated role debut as Gilda in Rigoletto at Pfalztheater Kaiserslautern, whereupon she was invited for a jump in as Queen of the night in Magic Flute at Musiktheater im Revier in Gelsenkirchen. For 2015/16, Judith Spiesser received an engagement as Konstanze in Die Entführung aus dem Serail at the Landestheater Bregenz, which she had to return, due to the birth of her daughter. In season 2016/17 she had her role debut as Lucia di Lammermoor at Burgenfestspiele Passau, which was highly praised by the press and the public. In 2017/18 she returned to Passau as Lucia. In the same season she took over the role of Anna Goméz in Menotti’s Der Konsul. In 2018/19 she sang the Queen of the Night at Theater Krefeld and also for the season 2019/20. At the end of the season 2018/19 Judith Spiesser took over the vocally and dramatically highly demanding role of Julie in Johanna Doderer’s opera Liliom at the Staatstheater am Gärtnerplatz in Munich in the short term with great success.