I have led the Radiation Epidemiology group since 2017 when it was formed. Previously I led a statistical analysis group, one of the two groups involved in radiation epidemiology at UKHSA.

I joined the National Radiological Protection Board (NRPB), which was later subsumed into UKHSA, in 1991 having gained a BSc in Mathematics and an MSc in Medical Statistics both from Leicester University. At NRPB I began research into the use of Bayesian statistics for estimating computationally expensive functions, which led to a PhD in 1997 from Nottingham University. I have considerable experience with the analysis of large epidemiological datasets, in particular the UK National Registry for Radiation Workers, the British Nuclear Fuels Limited cohort and the British Nuclear Test Veteran's Cohort.

Over the last 10 years I have been involved with a number of large collaborative International epidemiology projects, notably the EC funded SOLO project and the INWORKS studies of occupational radiation exposure risk.