| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Lakeside |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SSS | Sengkang |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Hotel | SS | SS | Aljunied |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SSS | Sengkang |
| Force-One Security | North | Data Centre | SS | CSO | Ang Mo Kio |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SSS | Sengkang |
| Security & Risk Solutions Pte. Ltd. | South | Office Building | SS | CSO | Boon Lay |
| Peregrine Security Pte. Ltd. | Central | Commercial | SS | SS | Sengkang |
| Inhouse Employer | Central | In-House | SS | CSO | Pioneer |
| Force-One Security | North | Data Centre | SS | SSO | Sembawang |
| AETOS Holdings Pte Ltd | West | Commercial | SSO | SS | Marsiling |
| RAS Security Pte Ltd | Island Wide | Commercial | SSO | SS | Sengkang |
| Fervour Pte Ltd | North | Healthcare | SSO | SSO | Admiralty |
| AETOS Holdings Pte Ltd | West | Commercial | SSO | SS | Marsiling |
| Securitas Guarding Services (Singapore) Pte Ltd | West | Data Centre | SSO | CSO | Boon Lay |
| Union Security Services Pte. Ltd. | North | - | SSO | CSO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Tampines |
| Excellent Security & Safety Pte Ltd | Central | Industrial / Factory | SSO | SSO | Toa Payoh |
| Primesafe Security & Investigation Pte Ltd | Central | Condominium | SSO | SSO | Bedok |
| Metropolis Security Systems Pte Ltd | Island Wide | Mix-Development | SSO | SSO | Bedok |
| Mainguard Security Services (S) Pte Ltd | East | Healthcare | SSO | SO | Pasir Ris |
| Inhouse Employer | North | Industrial / Factory | SSO | SO | Yishun |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Bukit Panjang |
| Inhouse Employer | North | Industrial / Factory | SSO | SO | Bukit Panjang |
| Metropolis Security Systems Pte Ltd | East | Gov Building | SSO | SS | Aljunied |
