The French opera singer Marc Mauillon has taken both baritone and tenor roles, and is equally conversant in Baroque, mainstream, and contemporary operatic repertory. Mauillon was born in Montbéliard in eastern France in 1980, and his first musical training took place in that city. He moved on to studies in Epinal and Montreuil, and then to the National Conservatory of Music in Paris. There he studied with Peggy Bouveret, graduating with a diploma from the Conservatoire national supérieur de musique et de danse de Paris (CNSMDP) in 2004. In 2002, he was accepted into the first class of the Jardin des Voix, the academy created by early music conductor William Christie to nurture young singers in the Baroque music field, and for the first part of his career he performed mostly in Baroque opera: Purcell's The Fairy Queen, Dido and Aeneas, and King Arthur, Lully's Cadmus and Hermione, Atys, and Lully's Armide; John Blow's Venus and Adonis; Cavalli's Egisto at the Opéra Comique (in which he sang the title role), and Rameau's Hippolyte et Aricie, in a Palais Garnier production. He has worked with most of the top early music conductors of the early 21st century, including Jordi Savall, Christophe Rousset, Marc Minkowski, and many others. He has appeared in Mozart's Die Zauberflöte and Così fan tutte, in vocal works by Debussy and Poulenc, and in contemporary operas by Péter Eötvös and Pascal Dusapin.
Mauillon made his recording debut in 2006 with the first of several albums devoted to the music of Guillaume de Machaut. He has recorded for the Eloquentia, Arcana (an album of settings by Giulio Caccini and Jacopo Peri of texts connected with Orpheus, and, in 2018, Harmonia Mundi, for whom he recorded a newly unearthed set of Tenebrae Lessons by 17th-century French composer Michel Lambert. In 2014, Mauillon became a professor at the Pôle d'Enseignement Supérieur de la Musique Seine-Saint-Denis Ile-de-France, known as Pöle Sup 93.