He currently serves in the roles of Co-Director of the Molecular Imaging Program at Stanford (MIPS, http://mips.stanford.edu/public/about.adp), Director of the Stanford Center for Innovation in In-Vivo Imaging (SCI3, http://mips.stanford.edu/public/sci3.adp), and Director of the Stanford Near Infrared Optics and Photomedicine Center. He is a member of the Stanford BioX faculty (http://biox.stanford.edu/), the immunology Program and the Stanford Cancer Center (http://cancer.stanford.edu/). His area of study focuses on understanding both the mechanisms of disease (cancer, infection and genetic diseases), and the complex genetic programs of mammalian development and stem cell biology.