| Crowne Plaza Changi Airport | East | In-House | OM | CSO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Punggol |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Punggol |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Punggol |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Punggol |
| Soverus Pte Ltd | Central | Industrial / Factory | SS | SS | Punggol |
| Ascentiaa Security Management Pte Ltd | East | Condominium | SSO | SS | Punggol |
| Shine Security Agency Pte Ltd | Central | Commercial | SSO | SS | Punggol |
| Mainguard Security Services (S) Pte Ltd | East | Healthcare | SSO | SS | Punggol |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | Nil | Punggol |
| Securus Pte Ltd | Island Wide | - | OE | SS | Punggol |
| Elid Technology International Pte Ltd | East | Condominium | SS | SS | Punggol |
| Apro Asian Protection Pte Ltd | East | School | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Punggol |
| Certis Group | Island Wide | - | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | South | School | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | South | School | SO | SO | Punggol |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SO | Punggol |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Punggol |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Punggol |
| Elid Technology International Pte Ltd | Island Wide | - | SSO | SSO | Punggol |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Punggol |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SS | Punggol |
