William H. Siemering (born October 26, 1934) is a radio innovator and advocate. He was a member of the founding board of NPR and the author of its original "mission statement," the National Public Radio Purposes. As NPR's first director of programming Siemering helped shaped its flagship program All Things Considered into an influential and enduring fixture of American media. After a decades-long career in public radio, Siemering embarked on a second career of nurturing independent radio in the developing world.