 In 1995, she became Rep. Joseph P. Kennedy II's (D-MA) Legislative Director.In 1998, Mizeur was named Director of State Affairs at the National Association of Community Health Centers, an organization advocating for improved access to health care for the uninsured.In 2003, she became U.S. Sen. John Kerry's (D-MA) Director of Domestic Policy, and authored much of his health care platform for the 2004 presidential campaign.