Professor Hewitt has extensive experience in programming and supporting researchers, scientists and engineers, particularly in supercomputing, data and visualization. With colleagues in CSC and SGI, he ran the CSAR HPC service for UK academia from 1998 to 2006, one of very few successful government-funded PFI IT projects; its unique feature being the pay-as-you-go capability. This service role has been complemented by a diverse research and development program of 48 awards valued at around £20M, with funding obtained from the UK Research Councils, UK Government departments, the EU, and international companies. He has supervised 27 MSc and 16 PhD students, and has published over 80 papers, co-authored a book, and edited another. His company has provided services to London Metropolitan University, NEC, DEFRA/MOD, the University of Manchester, Science and Technology Facilities Council, Bangor University, Swansea University, HPC Wales, and a number of commercial clients.