After receiving her Juris Doctor, Marshall worked for the Bill Clinton presidential campaign, 1992 as Special Assistant to Hillary Clinton.[2] In 1993, she served on the East Wing staff of then-First LadyHillary Clinton as Special Assistant to the First Lady.[2] In October 1997, at the age of 32, Marshall was appointed Deputy Assistant to the President and White House Social Secretary.[2][5] After President Clinton's term ended in January 2001, Marshall continued working with the former president as a senior advisor, helping to advance his work in policy, politics, and community initiatives.[2] In 2001, she began working as a consultant to a number of nonprofit and private sector organizations.
In 2006, Marshall joined the re-election efforts for Senator Hillary Clinton, and subsequently joined the Hillary Clinton presidential campaign, 2008.[2] As Senior Advisor, she led the Surrogate Speakers Program and helped coordinate women's outreach. In 2008, Marshall became executive director of HillPAC and Friends of Hillary and oversaw the closure of both committees.[6]
She was sworn in as US Chief of Protocol on August 3, 2009.[7] On May 16, 2010, Marshall was the keynote speaker at Commencement of her law school alma mater.[6][2]
On March 26, 2014, Elle honored Marshall, with others, at Italian Embassy in the United States during its annual "Women in Washington Power List."[8]
In September 2023, Marshall joined strategic advisory firm FGS Global as a partner in the firm's Washington, D.C. office.[9]
