| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SS | Woodlands |
| Interlocal Exim Pte Ltd | Central | In-House | SO | SS | Hougang |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Pasir Ris |
| Securus Pte Ltd | East | Condominium | SS | SS | Aljunied |
| Interlocal Exim Pte Ltd | Central | In-House | SO | SS | Hougang |
| Securus Pte Ltd | Island Wide | - | OM | SS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Bukit Panjang |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| PICO Guards Pte Ltd | Island Wide | - | OE | SS | - |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | - |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | In-House | OE | SS | - |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | - |
| PICO Guards Pte Ltd | Island Wide | - | OE | SS | - |
| Ademco Security Pte Ltd | Island Wide | - | SSO | SS | Ang Mo Kio |
| PICO Guards Pte Ltd | North | Data Centre | SS | SS | Ang Mo Kio |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SS | Pioneer |
| Premier Security Co-operative Ltd | South | Commercial | SS | SS | Pioneer |
| Peregrine Security Pte. Ltd. | South | Office Building | SS | SS | Pioneer |
| Premier Security Co-operative Ltd | South | Commercial | SS | SS | Pioneer |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Tampines |
