Larson was appointed by then-Governor Mitt Romney in January 2005 to the Rose Fitzgerald Kennedy Greenway Conservancy Board, where she served as vice chair of the board until October 2012. She was also chosen by Mayor Thomas Menino in 2004 to serve on the Boston Host Committee for the Democratic National Convention, and was appointed by Governor-Elect Mitt Romney in November 2002 to chair his Transportation and Housing Transition Team.