From the age of seven, Sigrun Haaser was singing in the Cathedral Choir in Speyer where she learned Gregorian notation and accurate sight reading. Her first solo came at the age of twelve when she sang the „Echo Aria“ from J.S. Bach’s „Christmas Oratorio“. Many more solos were to follow.
It was during this time that her talent was noticed by Prof. Erika Köth. She supported her with private lessons until it was time for her music studies to begin.
Her study began in Mannheim with Prof. Molnár. This was followed by a diploma as concert singer teacher with Prof. Klaus Dieter Kern in Karlsruhe, which she gained „with excellence“. She went on to study classical repertoire with Prof. Hartmut Höll and Mitsuki Shirai, rounding off this period with two years at Würzburg University under the tutelage of Prof. Charlotte Lehmann.
While still studying she began to attend valuable masterclasses in opera, operetta, oratorio and the art of Lieder singing with Bernd Weikl, Edith Mathis, Anna Reynolds, Sena Jurinac and Hilde Radek, Barbara Schlick and Charlotte Lehmann with Dr. Huber-Contwig.
At the same time she began to build her concert career e.g. during the 1996 summer Concert season in Baden Baden, and giving operetta concerts in Tübingen, Rottenburg, Trier and Speyer, where she sang a wide ranging repertoire. In October 2000 she sang the leading role of „Atalanta“ in Christoph Graupner’s opera „La costanza vince l’inganno“ as guest soloist in the Gmunden Stadttheater, in Austria.
Since October 2000 she has taught singing in the Department of Philosophy at Würzburg University.