| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Force-One Security | North | Data Centre | SS | SSO | Simei |
| Force-One Security | North | Data Centre | OE | SSO | Simei |
| Security & Risk Solutions Pte. Ltd. | Central | In-House | RSOC/CAMS Op | SSO | Sengkang |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | SSO | Sengkang |
| Metropolis Security Systems Pte Ltd | South | Commercial | SSO | SSO | Bukit Batok |
| Acestes Pte Ltd | East | Condominium | SO | SSO | Sengkang |
| AGS Integration Pte. Ltd. | West | Condominium | SSO | SSO | Bukit Batok |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSO | Hougang |
| Securistate Pte Ltd | West | Industrial / Factory | SSO | SSO | Bukit Batok |
| William Secure Solutions Pte Ltd | Central | Embassy | SSO | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| TwinRock Global | North | Condominium | SO | SSO | Yishun |
| Trek Investigations & Security Management Services Pte Ltd | Central | - | SO | SSO | Yishun |
| SMS Investigation & Security Pte Ltd | North | Condominium | SO | SSO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SSO | Yishun |
| Inhouse Employer | North | In-House | SO | SSO | Yishun |
| Ranger Investigation & Security Services Pte Ltd | North | Construction | SO | SSO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| Elid Technology International Pte Ltd | North | Condominium | SO | SSO | Yishun |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Inhouse Employer | West | Industrial / Factory | SO | SSO | Boon Lay |
