| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SS | Admiralty |
| Certis Group | Island Wide | - | SO | SS | Admiralty |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SS | Admiralty |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Admiralty |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| M Social Singapore | Central | Hotel | OE | SS | Admiralty |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SS | Admiralty |
| M Social Singapore | Central | Hotel | OE | SS | Admiralty |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Admiralty |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Admiralty |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | In-House | SS | SS | Admiralty |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Admiralty |
| Inhouse Employer | Central | In-House | SS | SS | Admiralty |
| Certis Group | South | Healthcare | SS | SS | Admiralty |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
