| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Marsiling |
| SATS Ltd | Island Wide | - | OM | Nil | Hougang |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SSS | Yishun |
| Metropolis Security Systems Pte Ltd | North | - | SO | SSO | Sengkang |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Toa Payoh |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Sengkang |
| Eagle I Security Services Pte Ltd | East | Commercial | SO | SO | Pasir Ris |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | Nil | Dover |
| SMS Investigation & Security Pte Ltd | East | Condominium | SSO | SS | Punggol |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Lakeside |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Inhouse Employer | East | Hotel | Security Managment | SSS | Ang Mo Kio |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Bukit Panjang |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | SSO | Marsiling |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
| Focal Investigation & Security Agency Pte Ltd | South | Commercial | SO | SO | Tampines |
| Metropolis Security Systems Pte Ltd | West | Industrial / Factory | SSO | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SO | Mountbatten |
| RAS Security Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SSS | Sengkang |
| Certis Group | Island Wide | - | SSO | SO | Yishun |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SSS | Pasir Ris |
| York Hotel (Private) Limited | Central | In-House | OM | CSO | Pasir Ris |
| SATS Ltd | East | - | OE | SS | Clementi |
