| Avina, Jaime | Utilities Specialist | Utilities | 949-718-4418 | |
| Auger, Craig | Utilities Supervisor | Utilities | 949-718-3481 | |
| Acuna, Perry | Public Works Crew Chief | Public Works Municipal Operations | 949-718-3478 | |
| Aguirre, Richard | Utilities Crew Chief | Utilities | 949-718-3474 | |
| Arechiga, Samuel | Equipment Operator I | Public Works Municipal Operations | 949-718-3463 | |
| Auger, Michael | Public Works Supervisor | Public Works Municipal Operations | 949-718-3463 | |
| Alvidrez, Michael | Utilities Crew Chief | Utilities | 949-718-3419 | |
| Aguirre, David | Utilities Crew Chief | Utilities | 949-718-3416 | |
| Ali, Shan | Intern | Public Works Municipal Operations | 949-718-3403 | |
| Aman, Matthew | Public Works Inspector II | Public Works | 949-718-1850 | |
| Arciniega, Elizabeth | Recreation Coordinator | Recreation | 949-718-1828 | |
| Angeloff, Anne-Marie | Library Assistant | Library - City | 949-717-3861 | |
| Aurelio, Stella Marie | Library Page | Library - City | 949-717-3851 | |
| Avila, Jasmin | Librarian I | Library - City | 949-717-3824 | |
| Anderson, Bryce | Firefighter Paramedic 112 Hour (Before 1-1-2016) | Fire | 949-644-3355 | |
| Anderson, Matthew | Fire Engineer 112 Hour | Fire | 949-644-3355 | |
| Alcaraz, Debbie | Administrative Assistant To The Fire Chief | Fire | 949-644-3351 | |
| Arellano, Tosha | Human Resources Analyst | Human Resources | 949-644-3337 | |
| Almendralo, Rodi | Civil Engineer, Associate | Public Works | 949-644-3334 | |
| Aube, Kyle | Civil Engineer, Associate | Public Works | 949-644-3296 | |
