| Olsen, Kaden | Lifeguard I | Fire | | |
| Ordaz, Jocelyn | Recreation Leader, Senior | Recreation & Senior Services | | |
| Ordiano, Omar | Recreation Coordinator | Recreation & Senior Services | 949-718-1993 | |
| O'Rourke, Brian | Assistant Chief, Lifeguard Operations | Fire | 949-644-3045 | |
| Orozco, Oscar | Planner, Associate | Community Development | 949-644-3219 | |
| Ortez, Francisco | Utilities Specialist | Utilities | 949-718-3461 | |
| Ortiz, Ryan | Lifeguard I | Fire | | |
| Osadche, Zachary | Harbor Services Worker | Harbor Department | | |
| Osborne, Sawyer | Lifeguard I | Fire | | |
| Oseguera, Armando | Fire Engineer 112 Hour | Fire | 949-644-3104 | |
| Oshefsky, Olivia | Recreation Leader, Senior | Recreation & Senior Services | | |
| O'Sullivan, Mitchell | Utilities Specialist, Senior | Utilities | 949-718-4418 | |
| Pagano, Roman | Firefighter 112 Hours | Fire | 949-644-3113 | |
| Papa, Kristin | Administrative Assistant | Utilities | 949-644-3012 | |
| Pariser, Elias | Lifeguard I | Fire | | |
| Parks, Casey | Superintendent | Utilities | 949-718-3477 | |
| Parra, Tyler | Civil Engineer, Associate | Public Works | 949-644-3347 | |
| Parry, Allyson | Library Page | Library - City | 949-717-3851 | |
| Parsons, Grant | Fire Captain 112 Hours | Fire | 949-644-3104 | |
| Partridge, John | Equipment Mechanic II | Public Works | 949-644-3063 | |
