Erwin Kiennast received his musical education at the Vienna Conservatory in the subjects piano, conducting and composition. At the beginning of his career he worked as a composer, arranger, accompanist and musical director in almost all music theaters in Vienna, including the State Opera and the Burgtheater.
In the late 1970s, Kiennast moved into the pop business. He produced, composed and played for representatives of the Austrian and international music scene, including Georg Danzer, Rainhard Fendrich, Jose Carreras, Stefanie Werger, Ludwig Hirsch and Shirley Bassey. This was followed by a seven-year collaboration with the Australian singer Sandra Pires.
In 1992 he started working on his own projects and founded the music and event production company OPERATOR together with Norman Weichselbaum. From this partnership, the Kiddy Contest format emerged in 1995, which, with 1.4 million records sold, is considered one of the most successful music formats in Austria.
He is also a composer of over a hundred film, stage and event productions. So u. a. the 2015 premiere musical CERUBIM based on a libretto by Gabriel Barylli.
Since 2003, Kiennast has been touring the globe several times for his film music projects. With his multinational orchestra "Surprising Art", founded in 2008, he is considered a specialist in large-scale music dramatic projects. Kiennast appears live with his high-tech piano "CLAVITAR" and as Theremin Performer.
In 2015, Erwin Kiennast was awarded the Golden Medal of Merit for the Republic of Austria for his work.