| Al-Imam, Jason | Finance Director/City Treasurer | Finance | 949-644-3126 | |
| Algazi, Aidan | Senior Pool Lifeguard | Recreation & Senior Services | | |
| Alexander, Trasara | Recreation Leader, Senior | Recreation & Senior Services | | |
| Alexander, John | Contractor | Public Works | | |
| Alexander, Erin | Fire Engineer 112 Hour | Fire | 949-644-3104 | |
| Alexander, Brason | Recreation & Senior Services Manager | Recreation & Senior Services | 949-644-3150 | |
| Alcaraz, Debbie | Administrative Assistant To The Fire Chief | Fire | 949-644-3351 | |
| Alarcon, Cruz | Lifeguard I | Fire | | |
| Alannouf, Anthony | Budget Analyst | Finance | 949-644-3122 | |
| Alaluf, Josie | Senior Pool Lifeguard | Recreation & Senior Services | | |
| Aigner, Jason | Lifeguard II | Fire | | |
| Aguirre, Richard | Utilities Crew Chief | Utilities | 949-718-3474 | |
| Aguirre, David | Utilities Crew Chief | Utilities | 949-718-3416 | |
| Aguilar, Miliana | Senior Pool Lifeguard | Recreation & Senior Services | | |
| Aguilar, Evelio | Contractor | Public Works | | |
| Acuna-Gonzalez, Martin | Facilities Maintenance Technician | Municipal Operations | 949-644-3067 | |
| Acevedo-Schiesel, Daniela | Lifeguard I | Fire | | |
| Aarons, Zephyr | Lifeguard I | Fire | | |
