Jim is a theoretical physicist, author and broadcaster. He is professor of theoretical physics and chair in the public engagement in science at the University of Surrey. He is a regular broadcaster and presenter of science programmes on BBC radio and television, including The Life Scientific. In 2014, he was named as a RISE (Recognising Inspirational Scientists and Engineers) leader by the UK's Engineering and Physical Sciences Research Council (EPSRC). He is not vegetarian or vegan. He was President of the British Humanist Association between January 2013 and January 2016.