| Arechiga, Samuel | Maintenance Operator | Public Works | 949-718-3463 | |
| Aman, Matthew | Public Works Inspector II | Public Works | 949-718-1850 | |
| Almendralo, Rodi | Civil Engineer, Associate | Public Works | 949-644-3334 | |
| Acuna-Gonzalez, Martin | Facilities Maintenance Technician | Public Works | 949-644-3067 | |
| Avila, Jasmin | Librarian I | Library - City | 949-717-3824 | |
| Angeloff, Anne-Marie | Library Assistant | Library - City | 949-717-3861 | |
| Asato, Natalie | Human Resources Analyst, Senior | Human Resources | 949-270-8141 | |
| Arellano, Tosha | Human Resources Analyst, Senior | Human Resources | 949-644-3337 | |
| Aune, Tor | Lifeguard I | Fire | | |
| Atwood, Ethan | Firefighter Paramedic 112 Hour (On Or After 1-1-2016) | Fire | 949-644-3113 | |
| Arnett, Chelsea | Department Assistant | Fire | 949-644-3175 | |
| Anderson, Bryce | Fire Captain 112 Hours | Fire | 949-644-3355 | |
| Anderson, Matthew | Fire Engineer 112 Hour | Fire | 949-644-3355 | |
| Ambrose, Trevor | Lifeguard II | Fire | | |
| Amat, Alex | Fire Captain 112 Hours | Fire | 949-644-3104 | |
| Alexander, Erin | Fire Engineer 112 Hour | Fire | 949-644-3104 | |
| Alcaraz, Debbie | Administrative Assistant To The Fire Chief | Fire | 949-644-3351 | |
| Alarcon, Cruz | Lifeguard I | Fire | | |
| Aigner, Jason | Lifeguard II | Fire | | |
| Acevedo-Schiesel, Daniela | Lifeguard I | Fire | | |
