Iris-Anna Deckert was born in Straubling, and while still in school was already receiving voice lessons at the University of Church Music in Regensburg. She went on to study with Dorothea Chryst at the Leopold Mozart Conservatory in Augsburg, where she completed her Staatsexamen in vocal performance. She was also the recipient of a scholarship from the German Theatre Association. Further studies with Edith Urbanzcyk and Aribert Reimann (lied singing) followed at the University of the Arts in Berlin. She also devoted time to studying Early Music, a pursuit that led her to Innsbruck and London with Jessica Cash and Nigel Rogers.While still in university, Deckert began to gain performing experience by singing in the Stuttgart Chamber Choir (conducted by Frieder Bernius) and the Bavarian Opera Chorus. More recently she has often been working as a replacement for Sibylla Rubens. As an international soloist Deckert commands a broad repertoire, and appearances at important European festivals bear witness to her wide-ranging artistic abilities. She is much in demand as an ensemble singer and works regularly with well-known groups such as the RIAS Chamber Choir and the Balthasar Neumann Choir. She especially enjoys working with Gli- Scarlattisti and ensemble cantissimo. She is a founding member of the latter group and has been closely associated with them for many years.
Deckert is noted for her interesting programming and has made many radio and compact disc recording of rarities and rediscoveries that go beyond the usual repertoire. She is also active as a vocal pedagogue and works as a vocal coach for the Zwitscherkantorei der Münstermusik in Constance as well as the Constance Chamber Choir.