oc ap ella ▁In ns b ruck . ▁ 2 0 1 2 ▁to ▁present : ▁cho irm aster ▁of ▁Chor ▁der ▁V iel f alt ▁( cho ir ▁of ▁divers ity ), ▁an ▁amateur ▁cho ir ▁in ▁In ns b ruck ▁committed ▁to ▁cultural ▁integration ▁and ▁divers ity . ▁ 2 0 1 5 : ▁Sie ber er ▁establish es ▁the ▁" In ns bru cker ▁Jugend chor " ▁( y outh ▁cho ir ▁of ▁In ns b ruck , ▁J UK O ) ▁for ▁which ▁he ▁also ▁functions ▁as ▁cho irm aster . ▁ ▁Theatre ▁In ▁ 1 9 9 2 ▁he ▁was ▁in ▁charge ▁of ▁st aging ▁and ▁re he ars al ▁of ▁the ▁theatre ▁music ▁for ▁the ▁" Vol ks sch aus p iele ▁T elf s ". ▁From ▁ 1 9 9 5 ▁to ▁ 2 0 0 1 ▁he ▁conducted ▁Werner ▁Pir ch ner ' s ▁incident al ▁music ▁for ▁Hugo ▁von ▁Hoff mann st hal ' s ▁Jed ermann ▁at ▁the ▁Sal zburg ▁Festival . ▁In ▁ 1 9 9 7 ▁he ▁conducted ▁the ▁world ▁premi ere ▁of ▁Werner ▁Pir ch ner ' s ▁Sh alom ▁– ▁Chor ä le ▁für ▁St reich or chester ▁at ▁the ▁festival ▁" Ste ir ischer ▁Her bst ". ▁In ▁ 2 0 1 3 ▁he ▁acted ▁as ▁musical ▁director ▁of ▁the ▁" Pass ion ss p iele ▁Er l ". ▁Con duct ing ▁In ▁ 1 9 9 0 ▁he ▁made ▁his ▁conduct ing ▁debut ▁with ▁the ▁Vienna ▁Chamber