Kieran's career began in 1993 with the Reuters News Pictures service in London. In 2000 he was made staff until resigning his position to become freelance in 2008.
His images have been published in numerous books and his work has exhibited in galleries in London, Barcelona, New York and Visa Pour L'Image in Perpignan.
Kieran's work has received first place honours from The British Picture Editor's Guild, Prix de La Photographie Paris, The Press Photographer's Year, The Sports Journalists Association, The Nikon Press Awards and Fuji's European Photographer of the Year Awards.