Knud Breyer has been editor in the Reger-Werkausgabe (RWA) at the Max Reger Institute Karlsruhe since 2021. Besides he has been a staff member of the Hanns Eisler Gesamtausgabe (HEGA) at the Freie Universität Berlin / Akademie der Künste, Berlin (since 2011) and at the Erich Schmid Edition (ESE) at the Zurich University of the Arts (2016–2019). He is also a freelance editor and author for several publishing-houses an cultural institutions.