[1] She is a former Baltimore City Public School teacher who now chairs one of the six standing committees of the Maryland House of Delegates.

Following her retirement from the Maryland House of Delegates in 2023, McIntosh has worked as a senior consultant at the Cornerstone Government Affairs lobbying group.

[5] On April 1, 2022, Governor Larry Hogan issued a Governor's Citation to McIntosh, and signed a bill into law creating the Maggie McIntosh School Arts Fund, which invests $250,000 a year into arts projects in Baltimore City public schools.

[17][18][19] McIntosh is also the first woman to serve as the chairman of the Environmental Matters Committee where she has steered several major legislative initiatives to passage.

[citation needed] The Chesapeake Bay Restoration Act, which funded upgrades at wastewater treatment plants around the state, is among McIntosh's accomplishments, as well as an annexation measure passed in 2006 in which she brought counties and municipalities together.