I serve as Co-PI of the NA-ACCORD, an international collaboration of more than 30 sites that merge data for comparative effectiveness research, and also serve on the Executive Steering Committee of the ART-CC, an international cohort research group. I have served on the Board of Directors of the American Board of Internal Medicine (and as Chair of the Infectious Disease Subspecialty Board) and the NIH Office of AIDS Research Advisory Council. I am past President of the HIV Medical Association, a member and current Chair of the IAS-USA Guidelines Panel on Antiretroviral Therapy, a Co-Chair of the AASLD/IDSA/IAS-USA HCV Treatment Guidelines group, and serve on numerous state, local, and national committees.