| TwinRock Global | Central | - | Security Mgt | SO | - |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SO | - |
| TwinRock Global | Central | - | OE | SO | - |
| William Secure Solutions Pte Ltd | Central | Condominium | SS | SO | - |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OM | SO | Sengkang |
| Orchid Hotel Private Limited | Central | In-House | OM | SO | Yishun |
| Inhouse Employer | North | Industrial / Factory | SSO | SO | Ang Mo Kio |
| Securus Pte Ltd | Central | Condominium | SS | SO | Bright Hill |
| Inhouse Employer | North | Industrial / Factory | SSO | SO | Sembawang |
| Concorde Security Pte Ltd | Island Wide | - | OE | SO | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | East | School | SO | SO | Lavender |
| Trek Investigations & Security Management Services Pte Ltd | East | Condominium | SO | SO | Lavender |
| Prosegur Singapore Pte Ltd | South | Commercial | SO | SO | Hougang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | School | SO | SO | Lavender |
| Triple ‘S’ Protection Pte Ltd | Central | Depot | SSO | SO | Hougang |
| Pan Pacific Serviced Suites Beach Road | South | In-House | SO | SO | Lavender |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Industrial / Factory | SO | SO | Hougang |
| Inhouse Employer | West | Industrial / Factory | SO | SO | Tuas Link |
| Tiger Hong Security Services & Consultants Pte Ltd | West | Condominium | SSO | SO | Tuas Link |
| Prosegur Singapore Pte Ltd | East | Industrial / Factory | SSO | SO | Sengkang |
| Prosegur Singapore Pte Ltd | South | Commercial | SSS | SO | Sengkang |
| Inhouse Employer | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| GoMobile Security Solutions Pte Ltd | West | Industrial / Factory | SSO | SO | Choa Chu Kang |
| Inhouse Employer | East | In-House | SO | SO | Choa Chu Kang |
| Security & Risk Solutions Pte. Ltd. | East | Commercial | SO | SO | Punggol |
