Mike Johnson has over 42 years’ experience in major hazards research and studies, originally joining British Gas Research & Development, now part of DNV (Email: michael.johnson@dnv.com). In the early part of his career, his work included a full risk assessment of the Canvey Island LNG terminal, one of the first major applications of quantified risk assessment in the oil and gas industry. In 1984, he took over responsibility of carrying out large-scale experimental research of vapor cloud explosions. Much of the data generated from this experimental work has provided validation for the predictive models used in the oil and gas industry. He is now VP Senior Principal Consultant within DNV Spadeadam Research and Testing, providing technical governance for a range of projects, including studies of the hazards associated with the distribution of hydrogen in the gas network. He has been a member of the DNV explosion investigation team since 1984, having investigated over 60 explosion incidents. This includes major vapor cloud explosions at Buncefield, U.K., in 2005 and Jaipur, India, in 2009. His involvement with Buncefield included working for the Buncefield Major Incident Investigation Board (BMIIB), providing expert evidence for subsequent civil litigation involving commercial operators.