| Certis Group | East | Gov Building | SO | SO | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Sengkang |
| Certis Group | East | In-House | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | Central | Gov Building | SO | SO | Sengkang |
| Certis Group | Island Wide | Commercial | SO | SO | Sengkang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | CSO | Sengkang |
| Certis Group | Island Wide | Commercial | APO | CSO | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Sengkang |
| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | CSO | Sengkang |
| Inhouse Employer | Central | School | SO | CSO | Sengkang |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| Artyzen Singapore | Central | Hotel | SS | CSO | Sengkang |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Sengkang |
| TwinRock Global | Central | - | Security Mgt | CSO | Sengkang |
| Star Security Services | Island Wide | - | Security Mgt | CSO | Sengkang |
