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Simon Thompson works as a research computing specialist at the University of Birmingham. Having worked in heterogeneous computing environments for a number of years, Simon now looks after HPC, research data and Cloud environments running on GPFS.




Claire O'Toole has been involved with the GPFS user group as secretary since it was started by OCF in November 2010. Claire is responsible for coordinating with the chair on the formal meeting agendas as well as communicating announcements to the group through the mailing list and website. Outside of the group, Claire is leader of all things marketing at OCF, one of the UK’s most successful high performance computing, storage and data analytics integrators.


Sector Rep - Media


Jez Tucker became involved with the user group when working as a GPFS Systems Administrator at Rushes – one of the world’s leading Television and Film post-production companies. As a previous user group chair person, Jez helped the group develop beyond the UK into europe and the USA. He is currently heading up Research and Product Development for PixIT’s media-optimised GPFS offering.




Arif Ali is currently technical director at OCF. He has been in HPC since joining OCF in 2003, and been integrating HPC based clusters in the UK ever since. As part of his integration a small percentage also requires the set-up and maintenance of GPFS with multi-clustering etc…; and most of the software he installs/integrates is on GPFS file-systems.

Arif assists in maintaining the infrastructure of the User Group; website, mailing list, domain, e-mails etc.


USA Chapter



Kristy Kallback-Rose manages the storage team at Indiana University in HPC systems. She has over three years experience running GPFS and before that working with OpenAFS and HPSS.




Bob Oesterlin works for Nuance Communications as a senior storage engineer for HPC grid. Prior to this Bob worked at IBM and has over 15 years experience with GPFS. He was is a founding Elder of the OpenAFS group.


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