In June 2011, Sévag Tachdjian was named "Most promising lyrical artist" by the German opera magazine "Theater Pur". In 2015, he won the 2nd Prize s at the "International Canary Competition" and the "Internationaler Komitas-Wettbewerb" in Berlin.

Born in Beirut, Sévag Tachdjian took his first steps on the stage at the age of eleven, when he joined the Young choir of the Opéra de Nice. He completed his training by studying the cello during his adolescence. After a master's degree in modern literature at the Sorbonne and another in journalism in Strasbourg, he devoted himself to singing at the CNSMD in Lyon in the class of Françoise Pollet, and perfected his skills in Salzburg and Munich with Rudolf Piernay and Wolfgang Brendel, as well as in master classes with Anna Tomowa-Sintow, Helen Donath, Kurt Moll and François Le Roux.

In 2010, the bass baritone of Armenian origin joined the Cologne Opera Studio, and then the Opéra Studio du Rhin in 2012, where he performed numerous roles under the direction of great conductors and directors such as Marullo (Rigoletto), Baron Douphol (La Traviata), the First Apprentice (Wozzeck), Spencer Coyle (Owen Wingrave), Maître Jean (La Colombe), and Don Annibale (Il Campanello).

He was then heard in the roles of Alidoro (La Cenerentola) at the Tours Opera, Zuniga (Carmen) at the Dijon Opera, Marullo (Rigoletto) at the Théâtre des Arts de Rouen and at the Théâtre des Champs-Elysées, Ahmad (Mârouf, savetier du Caire) and Oreste's tutor (Elektra) at the Opéra national de Bordeaux, the Genie de la Lampe (Aladin by Nino Rota) at the Opéra de Saint-Étienne, the Captain (Don Cézar de Bazan by Massenet) at the Théâtre impérial de Compiègne, at the Opéra de Reims and on tour, the Second Soldier (Salomé) at the Opéra national du Rhin, the Captain (Eugene Oneguine) at the Opéra de Marseille, Roussin (V'lan dans l'Oeil by Hervé) at the Opéra de Bordeaux and at the Théâtre des Champs-Élysées, Escamillo (Carmen) at the Montepulciano Festival and Gregorio (Roméo et Juliette) on tour with Opera Zuid.

He has also performed on the   concert platform with Les Musiciens du Louvre (Haëndel's Dixit Dominus), the Orchestre régional de Normandie    (Mozart's Krönungsmesse), the St Petersburg Philharmonic Orchestra and the Cris de Paris (Mozart's   Krönungsmesse), and at the Bordeaux Auditorium (Rossini's Petite Messe Solennelle).

Sévag Tachdjian is represented by RSB Artists since 2013.