| Sands Global Pte Ltd | Central | Condominium | SS | SO | - |
| William Secure Solutions Pte Ltd | Central | Condominium | SS | SO | - |
| William Secure Solutions Pte Ltd | Central | Condominium | SS | SO | - |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SSO | Woodlands |
| Securus Pte Ltd | Central | Condominium | SS | SO | Bright Hill |
| Sands Global Pte Ltd | Central | Condominium | SS | SS | Khatib |
| Trek Investigations & Security Management Services Pte Ltd | East | Condominium | SO | SO | Lavender |
| Tiger Hong Security Services & Consultants Pte Ltd | West | Condominium | SSO | SO | Tuas Link |
| Kingston Property Maintenance Services Pte Ltd | Central | Condominium | SSO | SSO | - |
| Unique Security Services Pte Ltd | Central | Condominium | SSO | SS | Toa Payoh |
| Chang & Chang Security Management Pte. Ltd. | Central | Condominium | SSO | SS | Toa Payoh |
| Metropolis Security Systems Pte Ltd | Central | Condominium | SSS | CSO | Ang Mo Kio |
| SMS Security | East | Condominium | SO | SO | - |
| Inhouse Employer | Island Wide | Construction | OM | SS | Sembawang |
| Inhouse Employer | Island Wide | Construction | OM | SSS | Braddell |
| Inhouse Employer | Island Wide | Construction | OM | SO | Yishun |
| Inhouse Employer | Island Wide | Construction | OM | SO | Choa Chu Kang |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Novena |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Construction | SO | SO | - |
| Inhouse Employer | Island Wide | Construction | OM | SSS | Jurong East |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Boon Lay |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Bukit Batok |
| Inhouse Employer | Island Wide | Construction | OM | SS | Choa Chu Kang |
| Inhouse Employer | Island Wide | Construction | OM | SS | Hougang |
| Inhouse Employer | Island Wide | Construction | OM | SS | Hougang |
