Duncan started on the British Triathlon Association Rules and Technical Sub Committee in 2005 and has been a part of the Triathlon England Rules and Technical Committee since its inception, becoming an Independent Non-Executive Director in 2011.
In Duncan's first term in the role he pushed the development of the Motor Cycle Officials Course, the Local and Regional Technical Official Courses and was lead in obtaining the ‘ITU Accredited Technical Officials’ Education Programme’, to enable BTF to offer the National Technical Officials course for International Officiating
Duncan started his first triathlon in 1989 and has raced every year since in all formats and distances, including a number of National titles, and has represented GB as an Age-Group athlete many times. He is qualified as an ITU International Technical Official, officiated at the Olympics, and has been the Technical Delegate for the WTS Stockholm event. Duncan is also an Officials tutor both nationally and internationally and won British Official of the Year in 2007 and 2010. In addition, he is a race organiser, qualified Level 3 triathlon coach and Chair of the BRAT Club, as well as sitting on the West Midlands Regional Committee.
During the daytime he runs his own business producing machines for the recycling and processing of plastics.