Moore was first elected to Chicago City Council as the alderman for the 49th ward, which includes the majority of Rogers Park and portions of West Ridge, in 1991.

[2] Mayor Richard M. Daley appointed Robert Clarke, a law associate of Illinois State Representative Lee Preston, the 49th ward Democratic committeeman.

Of eight incumbent alderman who were originally appointed by Daley to fill vacancies, Clarke was the only one to fail to win re-election that year.

Moore also served most recently on the following City Council committees: Budget and Government Operations; Education and Child Development; Finance; Health and Environmental Protection; Human Relations; Special Events, Cultural Affairs and Recreation; and Rules and Ethics.

Under his leadership, the 49th Ward was selected as one of the first areas of the city to host a community policing pilot project, which resulted in a 54% reduction in serious crime over a 20-year period.

The events have grown in popularity and have facilitated a recent surge in private business growth in Roger's Park.

[17] Moore has actively opposed an elected school board in City Council, maneuvering to block a ballot measure.

[24] Throughout his time as Alderman, Moore has overseen the creation of a number of annual events held in Rogers Park.

One the oldest of these annual events is the Rogers Park Back to School Picnic which is held on the last Sunday of every August.

The picnic has grown considerably since its founding in 1991 to include activities directed at a wide audience such as face painting, live music, bingo, and bouncy castles in addition to free food and school supplies.

At the end of the day participants are then given free food from restaurants around the ward to help promote local business growth.

"[25] Also, In its July 2016 cover story, Time included Participatory Budgeting (pioneered by Moore) as one of the "240 reasons to celebrate America right now.