| SMS Investigation & Security Pte Ltd | North | Condominium | SSO | SS | Woodlands South |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| SMS Investigation & Security Pte Ltd | North | Condominium | SSO | SS | Woodlands South |
| Paradox Singapore Merchant Court | Central | Hotel | SSO | SO | Bedok |
| Elid Technology International Pte Ltd | Central | Condominium | SSO | SSS | Ang Mo Kio |
| Elid Technology International Pte Ltd | Island Wide | - | SSO | SSO | Punggol |
| ESA Security Pte Ltd | South | Hotel | SSO | SSO | - |
| Excellent Security & Safety Pte Ltd | South | Commercial | SSO | SSO | - |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Hotel | SSO | SSO | - |
| Certis Group | Island Wide | - | SSO | SO | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Yishun |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Tampines |
| Premier Security Co-operative Ltd | North | School | SSO | SSO | Potong Pasir |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Marsiling |
| SMS Security | East | Mix-Development | SSO | SSO | Potong Pasir |
| Metropolis Security Systems Pte Ltd | West | Industrial / Factory | SSO | SSO | Bukit Batok |
| Apro Asian Protection Pte Ltd | Central | Commercial | SSO | SSO | Woodlands |
| SMS Investigation & Security Pte Ltd | East | Condominium | SSO | SS | Punggol |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SSO | SS | Punggol |
| SMS Investigation & Security Pte Ltd | North | Condominium | SSO | SSO | Marsiling |
| Amara Singapore | South | In-House | SSO | SSO | Khatib |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
