My background is in experimental physical chemistry and aerosol-cloud interactions, but for the last ten years I have been working on numerical simulation of the atmosphere, focussing on the chemistry of the troposphere. My main interests are in halogens, methane, NOx and heterogeneous chemistry. I am also interested in model-measurement comparisons and ways to quantify and improve model treatments of atmospheric composition. To the unalloyed delight of the Chemistry Dept IT officers, I am an ARCHER 'champion' which means I should act as a local point of contact if people are interested in the ARCHER HPC platform. Recently I became a Cambridge University 'Data Champion.'