Alan began as a physicist, however, he developed an interest in computing early on through signal processing for gamma ray burst detectors, and so switched to engineering after his BSc. His post graduate research at the Institute of Sound and Vibration Research (ISVR), University of Southampton, was in adaptive filtering, and novel methods of recovering corrupted signals. After leaving the ISVR Alan worked for the UK government for many years. He has particular expertise in, and continues to conduct research into, cyber security, covert communications, forensic computing and image/signal processing. Alan has been involved in some of the most significant advances in computer technology which have seen him elected as a Fellow and chartered member of the British Computer Society, Institute of Physics and the Royal Statistical Society.