Dr James Seddon is a clinical senior lecturer at Imperial College London, an honorary senior lecturer at Stellenbosch University in Cape Town, South Africa and an honorary consultant in paediatric infectious diseases at St Mary’s Hospital in London. He divides his time between Cape Town and London. His clinical work takes place at St Mary's Hospital where he looks after children with complex infectious diseases. Dr Seddon’s major area of research is that of children with tuberculosis, specifically drug-resistant forms. 

Dr Seddon studied medicine at Corpus Christi College, Cambridge University and Imperial College London and has carried out paediatric training at centres of excellence in the UK. Before clinical academia, he was an infantry officer in the British army, worked as a doctor for Médecins Sans Frontières in Côte d'Ivoire and spent time on an expedition in Patagonia. He undertook his PhD in Cape Town, studying drug-resistant tuberculosis in children and has gained diplomas in tropical medicine and paediatric infectious diseases.