| Seaton, Finley | Lifeguard I | Fire | | |
| Scrivner, Christopher | Firefighter Paramedic 112 Hour (On Or After 1-1-2016) | Fire | 949-644-3113 | |
| Scott, Zane | Lifeguard II | Fire | | |
| Schwenk, Jacob | Lifeguard II | Fire | | |
| Schoubye, Samuel | Lifeguard I | Fire | | |
| Schmillen, Justin | Deputy Recreation & Senior Services Director | Recreation & Senior Services | 949-644-3160 | |
| Schilling, Chloe | Office Assistant | Recreation & Senior Services | 949-644-3162 | |
| Schilling, Arianna | Recreation Coordinator, Assistant | Recreation & Senior Services | | |
| Schank, Deborah | Administrative Assistant | Community Development | 949-644-3284 | |
| Schaeffer, Lauren | Recreation Coordinator, Assistant | Recreation & Senior Services | | |
| Schaefer, Lauren | Firefighter 112 Hours | Fire | 949-644-3113 | |
| Sarver, Grant | Lifeguard I | Fire | | |
| Sarnowski, Allison | Department Assistant | Library - City | 949-717-3804 | |
| Santoni, Shane | Senior Pool Lifeguard | Recreation & Senior Services | | |
| Santoni, Micah | Lifeguard I | Fire | | |
| Sannella, Emily | Human Resources Specialist (HRis) | Human Resources | 949-644-3310 | |
| Sanford, Ryan | Harbor Services Worker, Lead | Harbor Department | 949-270-8159 | |
| Sanders, Laurie | Librarian I | Library - City | 949-717-3827 | |
| Sanchez-Valencia, Alex | Utilities Crew Chief | Utilities | 949-718-3437 | |
| Sanchez, Terry | Library Assistant | Library - City | 949-717-3895 | |
