Professor Brewer began his career as Head of Human Performance for the Football Association, where he formed part of the support team for the 1990 Italian World Cup.

Subsequently, Professor Brewer entered academia, undertaking senior leadership roles within the University of Bedfordshire. He has also held a number of significant Board level roles including Chair of the London Regional Sports Board, a Government appointed Non-Executive Director of UK Anti-Doping, Non-Executive Director of British Universities and Colleges Sport (BUCS), and Chair of British Ski and Snowboard.

John, who is a keen runner and skier, specialises in research areas including fitness standards in the Police Service, sports nutrition, hydration, fitness testing and relative age effect in sport.