| Arnett, Chelsea | Department Assistant | Fire | 949-644-3175 | |
| Alexander, Brason | Recreation & Senior Services Manager | Recreation & Senior Services | 949-644-3150 | |
| Arechiga-Camacho, Sonia | Fiscal Clerk, Senior | Finance | 949-644-3137 | |
| Al-Imam, Jason | Finance Director/City Treasurer | Finance | 949-644-3126 | |
| Alannouf, Anthony | Budget Analyst | Finance | 949-644-3122 | |
| Alexander, Erin | Fire Engineer 112 Hour | Fire | 949-644-3104 | |
| Amat, Alex | Fire Captain 112 Hours | Fire | 949-644-3104 | |
| Anderson, Jennifer | Purchasing And Contracts Administrator | Finance | 949-644-3080 | |
| Acuna-Gonzalez, Martin | Facilities Maintenance Technician | Public Works | 949-644-3067 | |
| Anderson, Steven | Department Assistant | Finance | 949-644-3032 | |
| Auger, Christian | Utilities Supervisor | Utilities | 949-644-3019 | |
| Asato, Natalie | Human Resources Analyst, Senior | Human Resources | 949-270-8141 | |
| Armas, Cesar | Recreation Supervisor | Recreation & Senior Services | 949-270-8109 | |
| Alarcon, Cruz | Lifeguard I | Fire | | |
| Aune, Tor | Lifeguard I | Fire | | |
| Acevedo-Schiesel, Daniela | Lifeguard I | Fire | | |
| Ambrose, Trevor | Lifeguard II | Fire | | |
| Aarons, Zephyr | Lifeguard I | Fire | | |
| Aigner, Jason | Lifeguard II | Fire | | |
| Appeldorn, Fletcher | Senior Pool Lifeguard | Recreation & Senior Services | | |
