Maureen grew up in Atlanta and went to Marist High School. After graduating from Wake Forest, she served as an AmeriCorps volunteer in an inner city school in Baltimore teaching art. Upon completion of the year, she enrolled in Catholic University Law School on a scholarship. It was there, in Criminal Law Term 1, that Maureen met her future husband, Brendan Sullivan. 

Maureen practiced law in the Boston area for five years. She clerked for the Massachusetts Superior Court and then took a job in public finance. She worked for five years assisting cities and towns in the New England area to finance capital projects such as school buildings, public safety buildings, and water or sewer projects. 

Maureen moved back to Atlanta in 2011 after the birth of her first baby. She wanted to be closer to family and be a stay at home Mom. The public finance team asked if she would stay on as contract attorney part time. She agreed and has worked remotely for the team since, while being a stay at home Mom with her three kids. 

Maureen has served on the Finance Committee for her local school and church. She has been on the board as Treasurer at her local baseball and softball park. In her spare time, Maureen enjoys swimming on a masters swim team and volunteering with her daughters softball teams.