| Munsey, James | Central School Feasibility Study Committee | Boards & Commissions | | |
| Morales, Carlos | Civilian Police Advisory Board Study Committee, Envision Arlington Diversity Task Group | | | |
| Mietinen, Pasi | Clean Energy Future | | | |
| Meeks, Amos | Clean Energy Future Committee | | | |
| Morgan, David | Clean Energy Future, Conservation Agent | | | |
| Mastro, Greta | Commission for Arts & Culture (ACAC), 2025 | | | |
| Morgan-Wu, Sarah | Commission for Arts and Culture (ACAC), 2023 | Boards & Commissions | | |
| McBride, Brian | Community Preservation Act Committee, Conservation Commission | Town Manager | | |
| Mayer, Leslie | Community Preservation Act Committee, Park & Recreation Commission | Town Manager | | |
| McBride, Brian | Conservation Commission, Associate | Conservation, Planning | | |
| Mulroy, Stacey | Director, Recreation | Town Manager | | |
| Muldoon, Patricia | Election Modernization Committee, League of Women Voters | | | |
| Morgan, David | Environmental Planner/Conservation Agent | Conservation, Planning | (781) 316-3012 | dmorgan@town.arlington.ma.us |
| Murray, Caroline | Envision Arlington Standing Committee | | | |
| Meyer, Johanna | Envision Arlington Standing Committee | Boards & Commissions | | |
| McKenna, David | Finance Committee (Prct. 21, 2024) | | | |
| Migliazzo, Sophie | Finance Committee (Prct. 4, 2024) | | | |
| McCarthy, Bill | High School Building Committee, AHS Assistant Principal | | | |
| Mason, Michael | High School Building Committee, School Chief Financial Officer | | | |
| Melofchik, Beth | Historic Districts Commission, Broadway District, 6/2026 | Boards & Commissions, Town Manager | | |
