In 1996, she co-founded the ensemble WireWorks in the Münster, Germany, as well, in 2008, the Hymer-Fograscher piano duo, based in Hamburg, Germany. Hymer is noted for her projects expanding the possibilities of piano playing by focussing on extended techniques (inside piano), the use of electronics as well as performance on miniature pianos such as the toy piano or the African thumb piano also known as kalimba or m'bira. Her musical projects include the multimedia piano program Handscapes,[1]Piano, Kalimba, Gadgets, Toy Piano,[2] Karlheinz Stockhausen's Mantra for two pianos and electronics[3] as well as Kalimba!Kontained for which she featured, for the first time in contemporary music, the kalimba as a solo instrument in a full evening program.
In 2010 she released her CD Ce n'est pas un piano with pieces by Tan Dun, Manfred Stahnke, Georg Hajdu, Cathy Milliken, Annie Gosfield, Annea Lockwood and Sascha Lemke produced by German label Ambitus.
She is a member and musical director of the Hamburg branch of GEDOK, a German/Austrian women's art organization.