Siobhan A. Reardon became the seventh President and Director of the Free Library of Philadelphia in September 2008. She is the first woman to serve in this capacity in 114 years, and was appointed after a national search conducted by the Free Library's Board of Trustees and the Free Library Foundation Board of Directors.

Since joining the Free Library of Philadelphia, Ms. Reardon has overseen freelibrary.org's expansion as a major digital force, featuring a robust set of downloadable materials, online collections, and mobile web pages; has successfully re-conceptualized the campaign to enhance and expand the Parkway Central Library, launching the first major renovations to the Beaux-Arts jewel in its nearly 100 year history; and has spearheaded the Library's initiative to move beyond its walls by creating computer and internet outposts—called Hot Spots—located deep in the hearts of underserved neighborhoods. In addition, Ms. Reardon is working with Mayor Michael A. Nutter to tackle the city's literacy crisis and equip all of its citizens with the necessary skills to contribute to the economic vitality of Philadelphia and fully thrive in the 21st century.

Previously, Ms. Reardon was Executive Director of the Westchester (NY) Library System, a 38-member cooperative library system. Prior to that, she was Deputy Executive Director of the Brooklyn Public Library, serving as Chief Operating Officer of the nation's fifth largest library system. She also served as Acting Executive Director and Director of Finance, responsible for the Library's $85 million annual budget.

Ms. Reardon began her library career at New York Public. She holds a B.A. from SUNY Purchase, an M.A. from Fordham University, and an M.L.S. from the Palmer School of Library Science at Long Island University. She serves on the boards of several local organizations, including the Greater Philadelphia Chamber of Commerce, the Philadelphia Education Fund, Lyrasis, and the West Philadelphia Alliance for Children. She is a resident of the Logan Square neighborhood of Philadelphia.