With BP: 1978, instrument and control engineer, London research laboratories, BP Research; mid 1980s, led team to create and commercialize large-scale scientific computers; late 1980s, head, exploration computing activities; early 1990s, Commercial Manager, exploration and production technical activities; Central Technical Manager, North Sea operations, Glasgow, then Aberdeen; Vice-President, Technology, Engineering and HSE for global gas, power and renewable activities. Director, Carbon Trust, UK. Member of the Advisory Board: Climate Group; National Center for Atmospheric Research, US; Engineering and Physical Research Council, UK.