| Prosegur Singapore Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| Crowne Plaza Changi Airport | East | In-House | OM | SSO | Pasir Ris |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SSO | Woodlands |
| Securus Pte Ltd | North | Commercial | SO | SSO | Woodlands |
| Triple ‘S’ Protection Pte Ltd | North | Shipyard / Port | SO | SSO | Woodlands |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SSO | Woodlands |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Woodlands |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | Woodlands |
| Sands Global Pte Ltd | Central | Condominium | SSO | SSO | Choa Chu Kang |
| Sands Global Pte Ltd | Central | Condominium | SSO | SSO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSO | Hougang |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Hougang |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSO | Clementi |
| SATS Ltd | East | - | OE | SSO | Clementi |
| Strive Security Pte Ltd | Island Wide | - | OE | SSO | Clementi |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Clementi |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Clementi |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSO | Clementi |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Hotel | SO | SSO | - |
| Elid Technology International Pte Ltd | Island Wide | - | SSO | SSO | Punggol |
| ESA Security Pte Ltd | South | Hotel | SSO | SSO | - |
