Frank Crawley served as a plant commissioning and start-up manager at Olefine Plants in ICI for seven years. He had a further 10 years "special duties" on ICI Nylon Intermediates. For 10 years, he was leader of the safety and loss prevention (now called process safety) engineering team in a major oil company. After retirement, he spent over 10 years as senior lecturer at Strathclyde University in parallel with consultancy activities.

Doug Scott graduated from the University of Bradford with a degree in chemical engineering and management economics. After working for 10 years in a variety of roles for oil and chemical companies, he joined the insurance industry as a risk engineer and over 35 years has visited hundreds of facilities around the world to perform risk surveys and advise on safety-related aspects of design and operation. He has been involved in a number of loss investigations and is the author of numerous technical papers.