Koepsell earned his PhD in philosophy (1997) as well as his doctorate in law (1995) from the University at Buffalo, where he studied with Barry Smith and currently serves as an adjunct Professor in the Department of Learning and Instruction. He has lectured worldwide on issues ranging from civil rights, philosophy, science, ontology, intellectual property theory, society, and religion. Koepsell was appointed Assistant Professor of Philosophy at TU Delft in September 2008 and was promoted to Associate Professor in September 2013. He is an associate editor of Free Inquiry magazine. He is the co-founder, with Edward Summer, of Carefully Considered Productions, an educational media not-for-profit corporation. Koepsell also serves on the Advisory Board of the Center for the Study of Innovative Freedom.