Jeanne K. C. Clark (b. 1949) was born in Natrona Heights, PA. One of ten children, her father was an accountant and her mother was a homemaker. She attended a Catholic elementary school and a public high school before matriculating at Boston University in 1967. She graduated in 1971.

Ms. Clark was active in the anti-war and women's health movements in Boston. Returning to Pennsylvania, she ran an anti-war program in New Kensington (1972-1974) and learned about the National Organization for Women (NOW). She founded the Alle-Kiski NOW chapter (1973), attended the first Pennsylvania NOW conference (1974), and found her passion.

Ms. Clark married Timothy Sullivan II in 1976 and moved to Brookline, a Pittsburgh suburb, with him and his two children. She joined the South Hills NOW chapter, founded by her friend Ellie Smeal. According to Ms. Clark (2008), "they lived and breathed building the movement."

Ms. Clark was one of only a few who had the opportunity to work as a career feminist. She served as director of the Allegheny Women's Center (1977-1986), an abortion clinic in Pittsburgh, and as national press secretary for the National Organization for Women (1986-1988). She also coordinated press outreach and coverage for more than a dozen marches in Washington, D.C. (1986-2004).

Political activism has been a family tradition for Ms. Clark. Her father served as municipal treasurer and district magistrate for 20 years. While recruiting women in Pennsylvania to run for political office in 1987, she was persuaded to run in the Democratic primary for the state senate seat representing the 43rd District. She lost that election, but has remained active in feminist politics.

Ms. Clark currently serves as director of communication for Citizens for Pennsylvania Future (PennFuture) and runs the Environmental Communications Center of Western Pennsylvania.