| Acevedo-Schiesel, Daniela | Lifeguard I | Fire | | |
| Aarons, Zephyr | Lifeguard I | Fire | | |
| Asato, Natalie | Human Resources Analyst, Senior | Human Resources | 949-270-8141 | |
| Arellano, Tosha | Human Resources Analyst, Senior | Human Resources | 949-644-3337 | |
| Avila, Jasmin | Librarian I | Library - City | 949-717-3824 | |
| Angeloff, Anne-Marie | Library Assistant | Library - City | 949-717-3861 | |
| Aman, Matthew | Public Works Inspector, Senior | Public Works | 949-718-1850 | |
| Aziz, George | Contractor | Public Works | | |
| Avila, Miguel | Contractor | Public Works | | |
| Arciniega, Patrick | Contractor | Public Works | | |
| Alvarado-Gonzalez, Yanet | Contractor | Public Works | | |
| Almazan Jr, Fernando | Contractor | Public Works | | |
| Alexander, John | Contractor | Public Works | | |
| Aguilar, Evelio | Contractor | Public Works | | |
| Aube, Kyle | Civil Engineer, Associate | Public Works | 949-644-3296 | |
| Almendralo, Rodi | Civil Engineer, Associate | Public Works | 949-644-3334 | |
| Avalos, Jessele | Recreation Leader, Senior | Recreation & Senior Services | | |
| Arroyo, Britney | Recreation Coordinator, Assistant | Recreation & Senior Services | | |
| Armas, Cesar | Recreation Supervisor | Recreation & Senior Services | 949-270-8109 | |
| Arciniega, Elizabeth | Recreation Coordinator | Recreation & Senior Services | 949-718-1828 | |
