 He has been a consultant for the National Commission on AIDS, the Center for Disease Control and Prevention, the American Red Cross, and the National Minority Task Force on AIDS.In 2000, he was appointed by then-Health and Human Services Secretary Donna Shalala to the new National Human Research Protections Advisory Committee, which examined issues of ethical conduct in human medical experimentation.He later served on the HHS Secretary's Advisory Committee on Human Research Protections.