Jon has illustrated over 30 children's books, including the self-penned Aarvark's Picnic (Macmillan) and Bones books (Walker Books). Jon also designs ackaging, greetings cards and posters for many publishers including Methuen, Macdonald, Michael O'Mara, interactive BBC Jam (animation art), BBC Cbeebies, Sainsburys (Christmas designs 2006), Tesco (Easter eggs), 85 Four/Dubai Health Authority, Paperchase, Early Learning Centre (Birthday Club gift pack as well as online games), Mothercare, (in-store Christmas graphics and Jigsaw puzzles. Leapfrog San Fransisco, Michael O'Mara, John Brown Citrus, Yellow Door, FoxKaloMaski and WelcometoSocial.
In March 2010 Jon teamed up with Dipali Vaidya (app developer) and launched his series of Elly the Reindeer apps which were downloaded over 29,000 times and charted in the top 100 iPad books in over 40 countries. Jon also teaches illustration and design BA students at East Sussex College and University of Brighton.