Director Research Projects (Fraunhofer ISST); Professor und Direktor, Institut für Softwaretechnik (Uni Koblenz); Mitglied des Program Management Board der Fraunhofer-Initiative „International Data Spaces“. Vorher: Professor für Software Engineering (TU Dortmund), Senior Member/Research Fellow (Robinson College, Uni Cambridge), Royal Society Industrial Fellow (Microsoft Research Cambridge), Postdoc (TU München), PhD Informatik (Uni Oxford), Dipl.Math. (Uni Bremen).