Steve has spent extended periods working on collaborative projects at a number of laboratories overseas including Argonne National Laboratory in the US, the National Institute for Materials Science in Japan and the University of Poitiers in France. He is a fluent French speaker and has been an external examiner of PhD theses in France, Belgium and Quebec. He is a member of the EPSRC Peer Review College, the scientific advisory committee of the French EMIR ion-accelerator network and the international committee of the Ion Beam Modification of Materials conference. He also occasionally participates in strategic reviews of universities for the National Commission for Academic Accreditation and Assessment (NCAAA) in Saudi Arabia and le Haut Conseil de l’Evaluation de la Recherche et de l’Enseignement Supérieur (HCERES) in France.