| 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 |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SS | Aljunied |
| Ademco Security Pte Ltd | South | Mix-Development | SS | SS | Aljunied |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SS | Aljunied |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | MacPherson |
| Ademco Security Pte Ltd | South | Mix-Development | SS | SS | Aljunied |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SS | Aljunied |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SS | SS | Aljunied |
| GATES PCM Integrated Services Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Certis Group | South | Healthcare | SS | SS | Admiralty |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Bukit Batok |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SS | Woodlands |
| PICO Guards Pte Ltd | North | Industrial / Factory | SSO | SS | Woodlands |
| Peregrine Security Pte. Ltd. | North | Industrial / Factory | SSO | SS | Woodlands |
| A-SAT Pte Ltd | North | Mix-Development | SSO | SS | Woodlands |
| A-SAT Pte Ltd | North | Commercial | SSO | SS | Woodlands |
| M Social Singapore | Central | Hotel | OE | SS | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Choa Chu Kang |
