Originally from Upstate New York, Green moved to St. Louis in 2005 to participate in the Coro Fellows Program in Public Affairs.

She has a political science degree from Penn State and a PhD in education policy from Saint Louis University.

[3] In November 2022, Green won the special election to replace President of the Board of Aldermen Lewis Reed, who resigned after being indicted on federal bribery charges.

She became politically active as a student at Penn State, participating in John Kerry's 2004 presidential campaign and fundraising for the Democratic National Committee in Chicago.

She went on to criticize the Board of Aldermen's "quid pro quo mentality" and said that "the deal cutting, bribery... at City Hall will never cease to amaze me.

"[17] Green later apologized to Alderman Sam Moore after implying that he had accepted bribes in exchange for his vote on the planned stadium.

The 2020 Democratic primary in this district was expected to be competitive as incumbent state senator Jamilah Nasheed could not run due to term limits.

[26] Green announced in December 2017 that she would challenge Lewis Reed in the 2019 Board President election, further straining a political relationship that the Riverfront Times characterized as approaching "dumpster fire territory.

[30] The St. Louis Post-Dispatch later reported that she had primarily lost due to a lack of support from Black voters on the city's north side.

[33] The only other candidate to file was Jack Coatar, an alderman whose ward was unsuccessfully targeted by Green's Flip the Board campaign in 2021.

[34] The race was characterized as pitting the city's two ideological wings against each other, with Green associated with Mayor Tishaura Jones' progressive voting bloc and Coatar aligned with more moderate Democrats.

[5] Then considered a close political ally of Mayor Tishaura Jones, Green stated that her initial priorities as President were allocating pandemic aid funds, expanding social services, and overseeing the reduction of the Board of Aldermen from 28 to 14 members.

[46] In February 2023, the Board of Aldermen rejected a plan from President Green that would have re-allocated city funds among the wards based on perceived need rather than the current practice of equal distribution.

[47] After progressives won a majority of the new 14-member Board in the April 2023 elections, Green oversaw the passage of a rules package that de-emphasized the power of seniority in the chamber.

[48] As President, Green has supported the professionalization of the Board of Aldermen by increasing aldermanic salaries and hiring legislative assistants.

[49] Her office created and circulated a citywide survey to gauge public opinion on ways to spend funds from the Rams settlement.

[51] Green was a major supporter of a bill raising the city's minimum wage to $11 and opposed efforts to privatize St. Louis Lambert International Airport.