| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Dover |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SSS | Bukit Panjang |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Union Security Services Pte. Ltd. | North | - | SSO | SO | Bukit Batok |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Lakeside |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Tampines |
| Inhouse Employer | South | In-House | SO | SSO | - |
| Aedge Services Pte Ltd | Island Wide | - | OM | SS | Pioneer |
| Artyzen Singapore | Central | Hotel | SS | CSO | Marsiling |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Crowne Plaza Changi Airport | East | Hotel | SSO | SSS | Tampines |
| Inhouse Employer | West | In-House | OM | SSS | Sengkang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSO | Tuas Link |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | CSO | Bedok |
| Force-One Security | Central | Commercial | SO | SSO | - |
| Peregrine Security Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| Focus Security Services Pte Ltd | West | Condominium | SS | SS | - |
| Certis Group | Central | School | SSO | SS | Farrer Park |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| SMS Investigation & Security Pte Ltd | Central | - | OM | CSO | Pasir Ris |
| Royal Security Management Services Pte Ltd | East | Commercial | SO | SO | Tampines |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | CSO | Marsiling |
