He is a philosopher at the Institute of Philosophy at the Alpen-Adria University Klagenfurt and a member of the scientific advisory board of the EFA. In his book "Das Jenseits der Philosophie" (1992), he developed a non-dualizing philosophy of change, which foregoes the categorical distinction between language and language-distinct reality. In "Die Flucht aus der Beliebigkeit" (2001), he critically examines the epistemological goal of truth. His books have been translated into Polish, and the journal "Constructivist Foundations" has published two special issues on his philosophy: "The Non-dualizing Philosophy of Josef Mitterer" (2008) and "Non-dualism: A Conceptual Revision?" (2013).