A British chemical engineer who was director-general of the Central Electricity Generating Board (CEGB). He began his career at Harwell United Kingdom Atomic Energy Authority (UKAEA), before leaving in 1983 to join the CEGB, but he returned in 1987 to become its chairman. After its breakup he became the first chairman of Nuclear Electric. He was a Fellow of the Royal Society and president of the Institution of Chemical Engineers in 1993. The John Collier Medal is awarded biennially and jointly by the Royal Academy of Engineering, the Royal Society, and the Institution of Chemical Engineers.