| Certis Group | Island Wide | - | SSO | SO | Woodlands |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Woodlands |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SO | Woodlands |
| Star Security Services | Island Wide | - | Security Mgt | SSS | Woodlands |
| Pedro Investigations & Security Services Pte. Ltd. | Central | Industrial / Factory | SO | SO | Woodlands |
| Metropolis Security Systems Pte Ltd | Island Wide | Mix-Development | SS | SS | Woodlands |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | SS | Woodlands |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | In-House | SS | SS | Woodlands |
| Securus Pte Ltd | Island Wide | - | OM | SO | Woodlands |
| Concorde Security Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Woodlands |
| Security Masters Pte Ltd | North | Commercial | CSO | SS | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Woodlands |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Woodlands |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SS | Woodlands |
| Ascentiaa Security Management Pte Ltd | Island Wide | Condominium | SS | SS | Woodlands |
| Inhouse Employer | Central | Hotel | SS | SS | Woodlands |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Woodlands |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Woodlands |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSS | Woodlands |
| Inhouse Employer | Island Wide | Construction | OM | SSS | Woodlands |
| Hotel Grand Central | Central | Hotel | Security Mgt | SO | Woodlands |
