Polish tenor Maciej Kwaśnikowski was born in Poznań and started singing at the age of 9 as a boy soprano.
 

Maciej began to study voice with Polish countertenor Robert Nakoneczny in 2014. In 2015 he entered the Warsaw Opera Academy at the Polish National Opera. Whilst there, he worked with Izabela Kłosińska, Eytan Pessen and Matthias Rexroth. In 2017, in addition to his musical training, he earned a degree in engineering physics from the Poznan University of Technology. That same year he sang the role of Florville in Rossini’s Il Signor Bruschino with the Orchestre national d’Île de France under the baton of Enrique Mazzola and entered the Académie de l’Opéra national de Paris. He was also part of the Young Singers Project of the Salzburger Festspiele and the Académie du Festival Aix-en-Provence.

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During his tenure at the Académie de l’Opéra national de Paris he performed as Alfred in Die Fledermaus by Johann Strauss, as well as the Young Gentleman in Philippe Boesmans’ Reigen. He was awarded the Prix Lyrique du Cercle Carpeaux (2018) and Prix Lyrique de l'AROP (2019).

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In 2019 he joined the prestigious Lindemann Program at the Metropolitan Opera. His MET debut as Young Sailor in Richard Wagner’s Tristan und Isolde, alongside other engagements, have been cancelled due to COVID-19 pandemic.

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He has performed numerous tenor sections in oratorio works of Bach, Handel, Mozart and notably in Schubert’s Mass in E Flat Major, with the Wiener Philharmoniker at the Salzburg Festival (2018) as well as with the Symphonieorchester des Bayerischen Rundfunks in Munich (2019), both under the baton of maestro Riccardo Muti. Frequent guest at the Salzburg Festival, he sang in the mass again in 2022 with Camerata Salzburg, under the direction of Franz Welser-Möst and performed in Mozart’s Coronation Mass with Mozarteum Orchestra led by Roberto González-Monjas in 2023. In 2024 he added to his repertoire Haydn's Creation, which he performed at the Montpellier Opera.

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Since the season 2021/2022 Maciej has appeared in numerous productions of the Paris Opera, notably as as Tybalt in a new production of Gounod’s Roméo et Juliette, conducted by Carlo Rizzi or as Young Sailor and Shepherd in Peter Sellars’ production of Tristan und Isolde by Richard Wagner, conducted by Gustavo Dudamel, always highly applauded by Parisian critics. In 2025 he made his role and house debut at the Polish National Opera as Tamino.

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In the upcoming 2025/2026 season he is singing the role of Beppe in Leoncavallo's Pagliacci at the Montpellier Opera, where he is also performing the tenor solo part in Mozart's Coronatio Mass. His other roles include Tybalt in Gounod's Roméo et Juliette at the Staatsoper Berlin and Teatro Real de Madrid, Narraboth in Strauss' Salome and Michel in Martinu's Julietta at the Wrocław Opera in Poland as well as Alméric in Tchaikovsky's Iolanta at the Rouen Opera.

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Maciej has been studying voice with Neil Shicoff since 2016.