Robert Francis Kennedy Jr., also known by his initials RFK Jr., is an American politician, environmental lawyer, author, conspiracy theorist, and anti-vaccine activist serving as the 26th United States secretary of health and human services since 2025. A member of the prominent Kennedy family, he is a son of Senator and U.S. attorney general Robert F. Kennedy and a nephew of U.S. president John F. Kennedy.
Kennedy began his career as an assistant district attorney in Manhattan. In the mid-1980s, he joined two nonprofits focused on environmental protection: Riverkeeper and the Natural Resources Defense Council (NRDC). In 1986, he became an adjunct professor of environmental law at Pace University School of Law, and in 1987 he founded Pace's Environmental Litigation Clinic.