| Ambrose, Trevor | Lifeguard II | Fire | | |
| Andersen, Leonard | Facilities Maintenance Worker II | Recreation & Senior Services | | |
| Anderson, Bryce | Fire Captain 112 Hours | Fire | 949-644-3355 | |
| Anderson, Jennifer | Purchasing And Contracts Administrator | Finance | 949-644-3080 | |
| Anderson, Matthew | Fire Engineer 112 Hour | Fire | 949-644-3355 | |
| Anderson, Morgan | Recreation Leader, Senior | Recreation & Senior Services | | |
| Anderson, Steven | Department Assistant | Finance | 949-644-3032 | |
| Angeloff, Anne-Marie | Library Assistant | Library - City | 949-717-3861 | |
| Aniol, Hali | Fiscal Clerk, Senior | Finance | 949-644-3248 | |
| Appeldorn, Fletcher | Senior Pool Lifeguard | Recreation & Senior Services | | |
| Appeldorn, Gavin | Senior Pool Lifeguard | Recreation & Senior Services | | |
| Aquino, Dan | Civil Engineer - Plan Check, Principal | Community Development | 949-644-3292 | |
| Arciniega, Elizabeth | Recreation Coordinator | Recreation & Senior Services | 949-718-1828 | |
| Arechiga, Samuel | Maintenance Operator | Public Works | 949-718-3463 | |
| Arechiga-Camacho, Sonia | Fiscal Clerk, Senior | Finance | 949-644-3137 | |
| Arellano, Tosha | Human Resources Analyst, Senior | Human Resources | 949-644-3337 | |
| Armas, Cesar | Recreation Supervisor | Recreation & Senior Services | 949-270-8109 | |
| Arnett, Chelsea | Department Assistant | Fire | 949-644-3175 | |
| Arregui, Gerardo | Planner, Assistant | Community Development | 949-644-3249 | |
| Arroyo, Britney | Recreation Coordinator, Assistant | Recreation & Senior Services | | |
