John is the deputy manager of the overall gLite middleware and manager of the security middleware of the EU flagship Grid project, EGEE. In his role in the project he has given many talks on Grid security and middleware worldwide. He manages a team of middleware developers and testers across Europe and maintains contacts worldwide with other Grid and distributed computing projects.

During the Grid projects, John was involved in secure credential transfer, Grid-accessible databases and secure encrypted data storage. He studied at the University of Victoria in Canada and produced a MSc on a CERN detector prototype testing programme and a PhD in experimental particle physics. John is currently hosted by the Helsinki Institute of Physics and stationed at CERN, Geneva.