| McBride, Brian | Conservation Commission, Associate | Conservation, Planning | | |
| Mayer, Leslie | Community Preservation Act Committee, Park & Recreation Commission | Town Manager | | |
| McBride, Brian | Community Preservation Act Committee, Conservation Commission | Town Manager | | |
| Morgan-Wu, Sarah | Commission for Arts and Culture (ACAC), 2023 | Boards & Commissions | | |
| Mastro, Greta | Commission for Arts & Culture (ACAC), 2025 | | | |
| Morgan, David | Clean Energy Future, Conservation Agent | | | |
| Meeks, Amos | Clean Energy Future Committee | | | |
| Mietinen, Pasi | Clean Energy Future | | | |
| Morales, Carlos | Civilian Police Advisory Board Study Committee, Envision Arlington Diversity Task Group | | | |
| Munsey, James | Central School Feasibility Study Committee | Boards & Commissions | | |
| Michele, Hassler | Cemetery Commission, (6/2025) | | | |
| McCarthy, William | Cemetery Commission (1/2024) | | | |
| Mahon, Diane | CDBG Subcommittee, Select Board | | | |
| Muszynski, Mary | CDBG Subcommittee, CDBG Administrator | Town Manager | | |
| Magee, Alex | Capital Planning Committee, Deputy Town Manager/Finance Director | | | |
| Maher, John | Cable Advisory Committee, Chair | | | |
| Miano, Mark | Building Maintenance Comm | Boards & Commissions, Town Manager | | |
| Maher, John | Building Committee (PTBC), 6/2025 | | | |
| Martini, Peter | Building Committee (PTBC), 6/2024 | | | |
| Mahon, Diane M. | Budget Revenue Task Group, Select Board | Boards & Commissions, Town Manager | | |
