His research interest are in HIV-liver disease which is supported by several NIH grants and non-invasive liver disease assessments. He has been an NIH-funded investigator for many years. He has published over 230 papers and serves on several prominent committees of national associations such as the AGA, AASLD, and ACG and study sections of the NIH. He is currently vice chair of the AASLD Foundation Research Committee, Chair of the Liver-Biliary Council of the AGA, a member of the Gastroenterology Board of the American Board of Internal Medicine, chair of the AASLD noninvasive guidelines writing group, and has served as the ACG Governor for Virginia for 6 years. He has won numerous awards for teaching and was voted “Top Doc” in 2012 and 2013 Richmond magazine.