Medus was born in Guelma (Algeria) where he spent his childhood before his family settled in Algiers. He took singing lessons from Rose Elsie (soprano of the Opéra-Comique) After an audition for conductor Désiré-Émile Inghelbrecht (1880–1965), then musical director of the Algiers Opera, he was hired for the role of Colline in La Bohème. He made his stage debut on 16 October 1929 in Puccini's opera in French. After two seasons of experience in a multitude of roles, he moved to Paris and was hired as a chorister at the Théâtre du Châtelet. He studied further with Pierre-Ernest Dupré.
In 1933 he joined the Opéra Garnier and made his debut there on 25 November 1933 as Ramfis in Aida. He made his debut at the Théâtre de l'Opéra-Comique on 20 April 1941 as Arkel in Pelléas et Mélisande. He performed extensively in French and other European opera houses.
In 1959, he left the Opéra Garnier troupe while continuing his career other French theatres. He taught at the Conservatoire de Paris
In 1974, he gave his farewell performance in the role of Sarastro in The Magic Flute, which he had performed frequently throughout his long operatic career. He continued to be a member of juries for singing competitions.
He died in Toulon and is buried in Lagoubran Cemetery.
Discography
Complete
Gilbert Bécaud's L'Opéra d'Aran [fr] (the priest), with Alvino Misciano, Rosanna Carteri, Agnès Disney, Michel Llado, Louis Maurin, Peter Gottlieb, Roger Soyer, Franck Schooten, Georges Prêtre (dir.)- Pathé ASTY 136-138 3 (33 rpm)