| Ashtree International Pte. Ltd. | West | Dormitory | SO | SS | Marsiling |
| Security & Risk Solutions Pte. Ltd. | Island Wide | - | OE | SSO | Marsiling |
| Premier Security Co-operative Ltd | East | In-House | Office Team | SSO | Marsiling |
| Security & Risk Solutions Pte. Ltd. | Central | - | Office Team | SSO | Marsiling |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | SSO | Marsiling |
| Force-One Security | North | Data Centre | OE | SSO | Marsiling |
| Force-One Security | Central | Commercial | SO | SSO | Marsiling |
| Inhouse Employer | East | School | SO | SSS | Marsiling |
| Inhouse Employer | Central | School | SO | SSS | Marsiling |
| Oneberry Technologies Pte Ltd | East | School | SSS | SSS | Marsiling |
| Inhouse Employer | West | School | OE | SSS | Marsiling |
| Inhouse Employer | North | Industrial / Factory | SSO | SSS | Marsiling |
| Ranger Investigation & Security Services Pte Ltd | South | In-House | SSO | CSO | Marsiling |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Marsiling |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | SS | SS | Marsiling |
| TwinRock Global | Central | - | Security Mgt | CSO | Marsiling |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Marsiling |
| Securus Pte Ltd | North | Condominium | SS | SS | Marsiling |
| Eagle I Security Services Pte Ltd | North | Condominium | SS | SS | Marsiling |
