| Marienthal, Robert | Lifeguard Officer - P/T | Fire | | |
| Marin, Abigail | Budget Analyst | Finance | 949-644-3021 | |
| Marks, Ari | Lifeguard II | Fire | | |
| Marler-Mulvenna, Bella | Library Clerk I | Library - City | 949-717-3858 | |
| Marquez Reynoso, Bryan | Maintenance Worker I | Public Works Municipal Operations | | |
| Marshall, Jake | Civil Engineer, Associate | Public Works | 949-644-3323 | |
| Martin, Jeremiah | Firefighter Paramedic 112 Hour (Before 1-1-2016) | Fire | 949-644-3355 | |
| Martin, Micah | Deputy Public Works Director - Municipal Operations | Public Works Municipal Operations | 949-644-3059 | |
| Martin, Steven | Firefighter Paramedic 112 Hour (Before 1-1-2016) | Fire | 949-644-3104 | |
| Martinez, Andrew | Equipment Mechanic, Senior | Public Works Municipal Operations | 949-644-3063 | |
| Martinez, Michael | Equipment Operator II | Public Works Municipal Operations | 949-718-3461 | |
| Martinez, Michale | Library Clerk I | Library - City | 949-717-3851 | |
| Martinez, Ruben | Maintenance Worker I | Utilities | 949-718-3407 | |
| Martinez, Savannah | Department Assistant | Community Development | 949-644-3293 | |
| Mason, Luke | Public Works Supervisor | Public Works Municipal Operations | 949-644-3067 | |
| Mastro, Martin | Harbor Services Worker | Harbor Department | | |
| Materassi, Luca | Recreation Leader | Recreation | | |
| Mathisrud, Cooper | Lifeguard I | Fire | | |
| Matsuyama, Andrew | Lifeguard Captain | Fire | 949-644-3047 | |
| May, Natalie | Lifeguard Captain | Fire | 949-644-3381 | |
