His fields of study are relativistic quantum field theory, cosmology, and particle astrophysics. He is also involved in supercomputer simulations of dark matter models. He directs the University of California High-Performance AstroComputing Center (UC-HiPACC).
His research interests lie in relativistic quantum field theory, cosmology, and particle astrophysics, with a particular emphasis on using high-performance computing to study dark matter models. He oversees the University of California High-Performance AstroComputing Center (UC-HiPACC).