In 2005, together with father Ernst Ottensamer and his older brother Daniel Ottensamer (both solo clarinettists of the Vienna Philharmonic), formed the clarinet trio The Clarinotts.
He first played with the Vienna State Opera and Vienna Philharmonic Orchestra in 1978, before becoming a principal clarinetist in 1983.
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His eldest son Daniel Ottensamer is also principal clarinet with the Vienna Philharmonic and youngest son Andreas Ottensamer is principal clarinet with the Berlin Philharmonic.
A guest performance during the Carinthian Summer in Ossiach in August 1997, under the leadership of Ernst Ottensamer, member of the Vienna Philharmonic Orchestra, was a great success.
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