He held positions as a rehearsal accompanist and chorus master at the LOCATION@1 , second chorus master at the LOCATION@2 , -LRB- NUMBER@1 -RRB- , and as organist at Saint-Pierre-de-Chaillot between NUMBER@2 and NUMBER@3 .

In NUMBER@1 he became chorus master at the Opéra where he coached the chorus to sing many famous operas .
