He worked as a research scientist for the Medical Research Council (MRC) Radiobiology Unit at Harwell in Oxfordshire from 1979–85, where he researched the removal of radionuclides from lung tissue, before becoming Head of Computing for the Mathilda and Terence Kennedy Institute of Rheumatology in Charing Cross (now owned by Imperial College) from 1985–90, building computer systems for the Kennedy Institute (also part of Hammersmith Hospital), the Arthritis and Rheumatism Research Council and Charing Cross Sunley Research Centre. From 1990–1, he was an IT consultant at Pfizer Central Research in Sandwich, south Thanet, where Viagra was discovered, advising research scientists on the design of computer systems, before working as Head of Computer User Support until 1997.