He is also an Affiliate Scientist at the Oregon National Primate Research Center. He is an immunologist with extensive experience in the investigation of nonhuman primate models of HIV/SIV pathogenesis and immunity. His current research includes developing models of optimal antiretroviral therapy (ART) suppression in SIV-infected rhesus macaques and the application of these models to understand how HIV/SIV persists during ART and to develop therapeutic approaches aimed at achieving durable remission from virus replication after ART withdrawal.