In 1996, following residencies at IRCAM and the ZKM, Karlsruhe, he co-founded the Ensemble WireWorks with his wife, pianist Jennifer Hymer—a group specializing in the performance of mixed-media composition.
In October 2007 he conducted « les Etudes d’après Séraphin » by W. Rihm, for the tenth anniversary of the ZKM, with the Ensemble für Neue Musik of the Musikhochschule Karlsruhe, and the Ballet of the Staatstheater of Karlsruhe.
While writing the latter book, Koerner collaborated with Bruno Latour and Peter Weibel on the 2002 exhibition Iconoclash at the ZKM in Karlsruhe.