Currently: Vice-President, Insititute of Mathematics and its Applications
15 years as a research and teaching fellow and lecturer at Glasgow and Cambridge. 20 years as a civil servant. Head of research at a research institute. Vice-president and councillor of the IMA, the learned and professional society for mathematicians in the UK.
LMS popular lecturer in 1994. BSA presidential lecturer 2016. Numerous talks to student groups and societies.