His research interests include researcher collaboration networks, quality representation and semantics, and provenance representation from data science tools. Stephan participated in the W3C PROV working group, contributing to the W3C PROV-O Recommendation and as editor of the W3C PROV-XML Note. Prior to working at Tetherless World, Stephan worked at the High Altitude Observatory of the National Center for Atmospheric Research in Boulder, Colorado. Stephan holds a B.S. (Computer Science) from the University of Colorado at Boulder.