| Stansfield, Candice | Recreation Leader, Senior | Recreation & Senior Services | | |
| Starn, Grady | Lifeguard II | Fire | | |
| Stefani, Parker | Recreation Leader, Senior | Recreation & Senior Services | | |
| Stein, Robert | Assistant City Engineer | Public Works | 949-644-3322 | |
| Stinson, Mariah | Administrative Assistant | Recreation & Senior Services | 949-644-3158 | |
| Stocks, Nicholas | Fire Battalion Chief | Fire | 949-644-3363 | |
| Stoerck, Thomas | Harbor Services Worker | Harbor Department | 949-270-8159 | |
| Strack, James | Fire Captain 112 Hours | Fire | 949-644-3104 | |
| Stribling, Jeffrey | Fire Engineer 112 Hour | Fire | 949-644-3355 | |
| Strozier, Savannah | Recreation Coordinator, Assistant | Recreation & Senior Services | | |
| Stuewe, Natalie | Library Page | Library - City | 949-717-3851 | |
| Suarez, Christian | Facilities Maintenance Worker II | Recreation & Senior Services | 949-644-3244 | |
| Sugiyama, James | Utilities Specialist, Senior | Utilities | 949-718-4418 | |
| Summerhill, Yolanda | Assistant City Attorney | City Attorney | 949-644-3135 | |
| Suppe, Dustin | Firefighter Paramedic 112 Hour (Before 1-1-2016) | Fire | 949-644-3355 | |
| Sutherland, Brett | Fire Captain 112 Hours | Fire | 949-644-3104 | |
| Sutton, Timothy | IT Technician | City Manager | | |
| Suzuki, Michelle | Paralegal | City Attorney | 949-644-3191 | |
| Suzuki, Tracy | Records Specialist | Public Works | 949-644-3343 | |
| Swain, Jackson | Maintenance Aide | Public Works | | |
