 His advisors were Charles Chihara, Stephen Neale, and John Searle.Since 2015, Cappelen has been Professor at the University of Oslo, where he co-directs CSMN's ConceptLab.He is running, with Øystein Linnebo and Camilla Serck-Hanssen, a project on conceptual engineering funded by a Toppforsk award from the Research Council of Norway.