| Inhouse Employer | Island Wide | Construction | OM | SO | Yishun |
| SATS Ltd | East | - | OE | SO | Yishun |
| Crowne Plaza Changi Airport | East | In-House | OE | SSS | Tampines West |
| Security & Risk Solutions Pte. Ltd. | Central | - | Office Team | CSO | Boon Lay |
| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| Inhouse Employer | Island Wide | Construction | OM | SSS | MacPherson |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | CSO | Bedok |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSO | Tuas Link |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Sembawang |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SO | - |
| Concorde Security Pte Ltd | Island Wide | - | OE | SO | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | North | Commercial | SO | SS | Woodlands South |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Admiralty |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSS | Dakota |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| Elitez Security Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| Ademco Security Pte Ltd | Island Wide | - | OE | SSS | Bedok |
| SATS Ltd | Island Wide | - | Inves | CSO | Marsiling |
| Acestes Pte Ltd | Central | - | Security Mgt | SSO | Punggol |
| Unique Security Services Pte Ltd | East | Condominium | SO | SO | Simei |
| Inhouse Employer | Island Wide | Construction | OM | SO | Choa Chu Kang |
