| Maberry, Scott | Harbor Services Worker, Lead | Harbor Department | | |
| Mader Dauk, Sweet Lou | Pool Swim Instructor | Recreation | | |
| Madsen, Bryce | Lifeguard II | Fire | | |
| Magana, Vanessa | Library Clerk II | Library - City | 949-717-3857 | |
| Magdaleno, Dyandra | Recreation Leader, Senior | Recreation | | |
| Maglinti, Avery | IT Manager | City Manager | 949-644-3091 | |
| Mahnken, Brian | Fire Captain 112 Hours | Fire | 949-644-3104 | |
| Malek Bejanian, Sevan | Civil Engineer - Plan Check | Community Development | 949-644-3281 | |
| Mannon, Joseph | Lifeguard I | Fire | | |
| Marchand, Phillip | Equipment Operator II | Utilities | 949-718-3407 | |
| 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 | |
