He studied with Kammersänger Roland Schubert at the University of Music and Theatre Leipzig, where he received his diploma.
[1] In 2013, Wartig appeared on the television programme Stars von morgen hosted by Rolando Villazón.
In the 2014 New Year's Eve concert of the Semperoper, he played Feri in the operetta Die Csárdásfürstin with Anna Netrebko and Juan Diego Flórez.
At the 2018 New Year's Eve concert, which was also broadcast on the ZDF, Wartig performed as Dr. Falke in Die Fledermaus.
His opera repertoire includes Colas (Bastien und Bastienne), Momus (Platée),[2] Sid (Albert Herring), the Count (Le nozze di Figaro), Papageno (The Magic Flute), Marullo (Rigoletto), Moralès (Carmen), Schaunard and Marcello (La Bohème), Father (Hänsel and Gretel'), Melot (Tristan and Isolde), Harlequin (Ariadne on Naxos), Boris (Moscow, Cheryomushki), Frank and Fritz (Die tote Stadt),[3] and Kaiser Overall (Der Kaiser von Atlantis).