Mathilde Ortscheidt won the 1st prize at the prestigious "Pietro Antonio Cesti" Baroque Opera Competition in 2023; she is regularly invited to perform as a soloist with baroque ensembles such as Les Arts Florissants (concerts conducted by Paul Agnew and the recording of Schütz's Italian Madrigals), the Poème Harmonique (conducted by Vincent Dumestre), the ensemble Correspondances (conducted by Sebastien Daucé) and Il Caravaggio (conducted by Camille Delaforge), le Poème Harmonique (conducted by Vincent Dumestre), l'ensemble Correspondances (conducted by Sebastien Daucé), and Il Caravaggio (conducted by Camille Delaforge, notably for the production of Montéclair's La Morte di Lucrezia).

She has also appeared as the Third Chosen One (Là-Haut, by Maurice Yvain) with Les Frivolités Parisiennes, in the alto solo part of Vivaldi's Dixit Dominus with the Orchestre de Chambre de Paris, conducted by Fabio Biondi, as La Mère (Kurt Weill's Der Jasager) at Maison de Radio France and Théâtre de Caen, and as Sesto in Frank Kawczyk's production of Mozart's La clemenza di Tito at La Seine Musicale.

Very active in the field of contemporary music, she created the role of La Mère in Martin Matalon's Celui qui dit non, with the Orchestre Régional de Normandie conducted by Olivier Opdebeeck (directed by Dorian Rossel and Delphine Lanza) and, as part of the Académie Ravel, two songs by pianist Jean-Baptiste Doulcet (cycle Glissements Progressifs du Désir).

After studying drama at the ESCA (École Supérieure de Comédiens par l'Alternance), she joined the Maîtrise Notre-Dame de Paris and Rosa Dominguez's class, while taking part in master classes with Margreet Honig, Regina Werner, Anne Le Bozec, Marcel Boone and Jennifer Larmore.

Mathilde Ortscheidt won in 2023 the 1st Prize in the Cesti Competition at the Innsbruck Festival of Early Music, was a semi-finalist in the 2023 Queen Elisabeth Competition, First Prize in the 2022 Canari International Lyric Singing Competition, winner of the Bellini Competition (Prix de la Ville de Vendôme) and a finalist in the annual Génération Opéra audition; In 2022 and 2023 she was also a prizewinner at the Fondation Royaumont, where she sang the role of Penelope in Monteverdi's Il ritorno d'Ulisse in patria.

In the 2023-2024 season, she will be appearing as La Mère sans insouciance and La Directrice du Cirque in Les Ailes du désir, by Othman Louati on tour in several french theater, as Licida (L'Olimpiade by Cimarosa) in Vienna and Versailles alongside the Talens Lyriques or as Tauride (Arianna in Creta) at Innsbrucker Festwochen. She will also sing again with Les Arts Florissants in several programmes and with the ensemble Correspondances (Cupid and Death programme).

Mathilde is represented by RSBA since 2023.