| MASON, MYRTIS | EXECUTIVE ADMINISTRATIVE | Transportation, Traffic & Parking | (203) 946-8078 |
| MAITLAND, CARLA | CHIEF SCHOOL CROSSING GUARD | Transportation, Traffic & Parking | (203) 946-8072 |
| MELENDEZSENIOR, JOAQUIN | TRAFFIC TECHNICIAN | Transportation, Traffic & Parking | |
| Mezzanotte, Lisa | Supervisor of Management Services | Police Services | (203) 946-6959 |
| Matteson, Sean | Chief of Staff | Mayor's Office | (203) 946-7672 |
| McCarthy, Justin | Chief Administrative Officer | Chief Administrator's Office | (203) 946-7902 |
| Martinez, Arami | Chief Payable Auditor | Finance Department | (203) 946-8305 |
| Montagna, Joseph | Accountant IV | Finance Department | (203) 946-6973 |
| Melendez, Maria | Administrative Assistant | Mayor's Office | (203) 946-7680 |
| Milone, Lisa | Republican Registrar of Voters | Registrar of Voters | (203) 946-6429 |
| Mack, Dean | Deputy Director, Economic Development | Economic Development Administration | (203) 946-5335 |
| Mahon, Michael | Receivables Collector | Finance Department | (203) 946-6401 |
| Maidelis, Meghan | Fire Inspector | Fire Services | (203) 946-6224 |
| 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 |
| Mariotti, Anna | Economic Development Officer / Project Manager | Economic Development Administration | (203) 946-3276 |
| Marquez Perez, Kengli | Lead Poisoning Inspector | Health Department | (203) 946-6798 |
| Martin, Stephen | Inspector/Investigator | Fire Services | (203) 946-4944 |
| Martinez, Benjamin | Site Equipment Resource Manager | | (203) 946-8199 |
| Martinez, Edgar | Lead Poisoning Inspector | Health Department | |
| Martinez, John | Inspector/Investigator | Fire Services | (203) 946-7656 |
| Martorana, Rory | Public Services Administrator: Comm, Market, Tech | Public Library | (203) 946-2283 |
| 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 |
| Medley, Krystal | Health Programs Director | Health Department | |
| Mendez, Carmen | Neighborhood Specialist | Livable City Initiative | (203) 946-7733 |
| Merly, Joseph | Asst. Corp. Counsel | Corporation Counsel | (203) 946-7921 |
| Mignosa, Robert | Management & Policy Analyst | | (203) 946-6342 |
| Milling, Farris | Office Manager | Health Department | (203) 946-8191 |
| Miranda-Foreman, Noemi | Paralegal | Economic Development Administration | (203) 946-2569 |
| Miranda-Noad, Maria | Executive Administrative Assistant | Community Services Administration | (203) 946-4943 |
| Mishra, Prajna | Purchasing Specialist | Finance Department, Purchasing Division | (203) 946-8204 |
| Mitchell, Darina | Community Liaison Trainer | Community Services Administration | (203) 909-0983 |
