Julian is one of the Co-directors of the Oxford Geoengineering Programme.
His areas of research include: The ethics of genetics, especially predictive genetic testing, pre-implantation genetic diagnosis, prenatal testing, behavioural genetics, genetic enhancement, gene therapy. Research ethics, especially ethics of embryo research, including embryonic stem cell research. New forms of reproduction, including cloning and assisted reproduction. Medical ethics, including end of life decision-making, resource allocation, consent, confidentiality, decision-making involving incompetent people, and other areas.
Julian is one of the authors of The Oxford Principles.