| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| York Hotel (Private) Limited | Central | In-House | SS | SS | Sengkang |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Woodlands |
| Security Masters Pte Ltd | Central | Data Centre | SS | SS | Hougang |
| PICO Guards Pte Ltd | North | Data Centre | SS | SS | Hougang |
| Prosec Services Pte Ltd | East | Data Centre | SSS | SS | Hougang |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Hougang |
| Inhouse Employer | West | In-House | OM | SS | Hougang |
| SATS Ltd | Island Wide | - | OM | SS | Hougang |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Hougang |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Hougang |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Hougang |
| SATS Ltd | Island Wide | - | OM | SS | Hougang |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Hougang |
| Securus Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SS | Hougang |
| Star Security Services | Island Wide | - | Security Mgt | SS | Hougang |
| TwinRock Global | Central | - | Security Mgt | SS | Hougang |
