In the spring of 2004, MacKinnon was a fellow of the Joan Shorenstein Center on the Press, Politics and Public Policy at Harvard's Kennedy School of Government.[4] That summer, she joined Harvard Law School's Berkman Center for Internet & Society as a Research Fellow, where she remained until December 2006.[5] Among her projects at the Berkman Center, MacKinnon founded Global Voices Online in collaboration with Ethan Zuckerman.[6]