| GATES PCM Integrated Services Pte Ltd | Central | School | SO | SO | Punggol |
| Aigle Security Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Inhouse Employer | Central | Hotel | SO | SS | Marsiling |
| Inhouse Employer | Central | Hotel | SO | SSO | - |
| Inhouse Employer | Central | Hotel | SO | SSO | - |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | - |
| Inhouse Employer | Central | In-House | SO | SSO | - |
| York Hotel (Private) Limited | Central | In-House | SO | SSO | - |
| Mahesh | Central | In-House | SO | SS | Aljunied |
| Peregrine Security Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SSO | Bukit Batok |
| TwinRock Global | Central | - | SO | SSO | Bukit Batok |
| Reachfield Security & Safety Management Pte Ltd | Central | Mix-Development | SO | SSO | Bukit Batok |
| Inhouse Employer | Central | Hotel | SO | SSO | - |
| Inhouse Employer | Central | Hotel | SO | SSO | Bukit Batok |
| Uniforce Security Services Pte Ltd | Central | - | SSO | SSO | Bukit Batok |
| Inhouse Employer | Central | Hotel | SO | SSO | Bukit Batok |
| Regal Security & Fire Management Services Pte Ltd | Central | In-House | SSO | SSO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| Inhouse Employer | Central | Hotel | SO | SSO | Bukit Batok |
| Inhouse Employer | Central | Hotel | SO | SSO | Jurong East |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Jurong East |
| M Social Singapore | Central | Hotel | OE | SSO | Jurong East |
| Inhouse Employer | Central | Hotel | SO | SSO | Jurong East |
