He moved on to the Nationaltheater Mannheim where he had his first leading position,[4][5] improving the quality of the group to being awarded the distinction Opera choir of the year by the critics of the trade magazine Opernwelt.
[6][7][8] From 2014, Michael was choral conductor at the Oper Frankfurt, achieving the distinction Opera choir of the year several times,[1] last in 2023, for the new productions of Wagner's Die Meistersinger von Nürnberg and Handel's Hercules.
[7][16] He was a guest conductor at the Tiroler Festspiele Erl [de] for Bach's Christmas Oratorio[17] and prepared the Hong Kong Philharmonic Chorus for the Brahms Requiem.
Michael, as other candidates, spent a day rehearsing with the Met chorus,[5] working on Offenbach's Les Contes d'Hoffmann, Puccini's La Rondine and The Hours by Kevin Puts and Greg Pierce.
[4] In the announcement of his appointment, Nézet-Séguin described Michael, then age 49,[4] as a "longtime collaborator and friend" and said: "He has an innate understanding of the complexity of the voice and draws out the best in the choruses he works with".