| Mack, Dean | Economic Development Officer | Economic Development Administration | (203) 946-5335 |
| Mahon, Michael | Receivables Collector | Finance Department | (203) 946-6401 |
| Maidelis, Meghan | Fire Inspector | Fire Services | (203) 946-6224 |
| MAITLAND, CARLA | CHIEF SCHOOL CROSSING GUARD | Transportation, Traffic & Parking | (203) 946-8072 |
| Mallison Jr., Gerald | Management Policy Analyst | Finance Department | (203) 946-7905 |
| Mancini, Kristin | Technical Services (Cataloging & Acquisitions) | Public Library | (203) 946-8127 |
| Mancuso, Sam | Overdose Prevention Project Manager | Health Department | (203) 946-3031 |
| Marioni, Cheryl | Management Division Analyst | Police Services | (203) 946-6280 |
| Mariotti, Anna | Economic Development Officer | Economic Development Administration | (203) 946-3276 |
| Marquez Perez, Kengli | Lead Poisoning Inspector | Health Department | (203) 946-6798 |
| Martinez, Arami | Chief Payable Auditor | Finance Department | (203) 946-8305 |
| Martinez, Benjamin | Site Equipment Resource Manager | | (203) 946-8199 |
| Martorana, Rory | Public Services Administrator: Comm, Market, Tech | Public Library | (203) 946-2283 |
| Marvin, Leeane | Park Ranger Trowbridge Environmental Center | Youth and Recreation Department | |
| MASON, MYRTIS | EXECUTIVE ADMINISTRATIVE | Transportation, Traffic & Parking | (203) 946-8078 |
| Mata, Maritza | Tax Collection Analyst | Finance – Tax Office | (203) 946-2217 |
| Matteson, Sean | Chief of Staff | Mayor's Office | (203) 946-7672 |
| Maza, Misty | Legislative Aide II | Board of Alders Legislative Services | (203) 946-7288 |
| Mazzadra, Rick | Housing Code Inspector | Livable City Initiative | (203) 946-8250 |
| McLaurin, Elijah | Neighborhood Specialist | Livable City Initiative | (203) 946-2333 |
| Melendez, Maria | Administrative Assistant | Mayor's Office | (203) 946-7680 |
| MELENDEZSENIOR, JOAQUIN | TRAFFIC TECHNICIAN | Transportation, Traffic & Parking | |
| Mendez, Carmen | Neighborhood Specialist | Livable City Initiative | (203) 946-7733 |
| Merly, Joseph | Asst. Corp. Counsel | Corporation Counsel | (203) 946-7921 |
| Mezzanotte, Lisa | Supervisor of Management Services | Police Services | (203) 946-6959 |
| Mignosa, Robert | Management & Policy Analyst | | (203) 946-6342 |
| Milling, Farris | Office Manager | Health Department | (203) 946-8191 |
| Milone, Lisa | Republican Voters Clerk | Registrar of Voters | (203) 946-7519 |
| Miranda-Foreman, Noemi | Paralegal | Economic Development Administration | (203) 946-2569 |
| Miranda-Noad, Maria | Executive Administrative Assistant | Community Services Administration | (203) 946-4943 |
| Mitchell, Darina | Community Liaison Trainer | Community Services Administration | (203) 909-0983 |
| Mitchell, Lorena | Coordinator Office of Community Health Initiatives | Community Services Administration | (203) 946-6759 |
| Mitchell, Tracey | Title Maintenance Clerk | Assessor’s Office | (203) 946-2323 |
| Mitra, Soma | Young Minds & Family Learning | Public Library | (203) 946-8132 |
| Mixsell, Anastasia | Tree System Coordinator | Parks Department | (203) 946-8092 |
