Following her successful guest appearances at the Pforzheim Theatre in the 2022/23 season, Cecilia Pastawski became a permanent ensemble member there in 2023/24. She sang HÄNSEL in “Hänsel und Gretel”, IDAMANTE in Mozart's “Idomeneo” and the MUSE/NICOLASSE in “The Tales of Hoffmann”, as well as DORABELLA in Mozart's “Così fan tutte”. In the season 2025/, she sings among other roles, the title role of Bizet's CARMEN.
In 2026, she also appears as DORABELLA in “Così fan tutte” at the Passau Theatre.

In the season 2019/20 , Ms. Pastawski appeared at the Teatro Municipal Santiago de Chile as ZULMA in Rossini's” L'Italiana in Algeri”. She also covered the role of the COMPOSER in Strauss's “Ariadne auf Naxos” and the role of SESTO in Mozart's “La clemenza di Tito” under the baton of Martin Haselböck at the Teatro Colón in Buenos Aires, where she had previously performed the title role in Ravel's “L'Enfant et les sortilèges”, BESSY in Weill's” Mahagonny” l, KUTCHICK in Dvořák's “Rusalka”, NUN in Prokofiev's “The Fiery Angel”, a FLOWERE MAIDEN in Wagner's “Parsifal” and ROSINA in Scarlatti's” Il trionfo dell'onore”. She also portrayed JUANA CASTRADA in Henze's “Wundertheater”. At the Centro Cultural Conex Buenos Aires, the attractive mezzo-soprano was celebrated in the role of ANGELINA in Rossini's “La cenerentola”

At the Teatro Avenida Buenos Aires the mezzo-soprano debuted just as successfully in trouser roles such as ROMEO in Bellini's” I Capuleti e i Montecchi”, as SIEBEL in Gounod's” Faust”, as MILES in Britten's “The turn of the screw”, as MERCÉDÈS in Bizet's “Carmen” and in the Mozart operas Le nozze di Figaro” as CHERUBINO in, as ZERLINA in “Don Giovanni” as ZERLINA and in "Così fan tutte” as DORABELLA.

Other important roles include NERONE in Handel's “Agrippina” at the Teatro Picadero Buenos Aires, DESPINA in “Cosi fan tutte” and WELLGUNDE at the Teatro Argentino de La Plata.

Ms. Pastawski initially studied singing at the Licenciada in Musical Arts (MPA) and at the opera studio of the Teatro Argentino de La Plata, before completing her vocal studies with a Master's degree at the Vienna Conservatory and the Institute of Advanced Studies in Art at the Teatro Colón. She is a prize winner of several singing competitions, including the Concurso Nacional de Ópera and Nuevas Voces para el Teatro Colón, and was a finalist at the Hans Gabor Belvedere 2016 and the New Voices Singing Competition in Gütersloh in 2013.

Cecilia Pastawski completed masterclasses with Raúl Giménez, Joyce Di Donato, Alicia Nafé and at the Vienna Conservatory with Bernarda Fink and Sylvia Gestzy.