Jem trained as a designer at Curtin University in Australia before moving to the UK. He first worked for traditional building designer, Charles Morris, before joining Heatherwick Studio in 2004. He was a key designer on a number of their projects, including La Maison Unique in New York and the British Pavilion for the Shanghai World Expo. In 2008 he concentrated on his passion for landscape - designing and building a number of private gardens in Europe and Australia. He joined Tom Stuart-Smith Ltd in 2009 and has run projects the UK, France, Switzerland, Spain and USA.