James is a Professor of Exercise Metabolism at Liverpool John Moores University and Chief Scientific Officer at Science in Sport (SiS), supporting the strategic delivery of bespoke performance solutions and innovation for SiS and their elite partners. He has authored over 240 research publications related to sports science, physiology and nutrition. He was also the Nutrition and Physical Performance Lead for Team Sky, Liverpool Football Club and a Programme Director for INEOS Sport, the latter encompassing a multi-sport performance programme.