| Peregrine Security Pte. Ltd. | Central | School | SO | SO | Bedok |
| Inhouse Employer | East | School | SO | SO | Bedok |
| Inhouse Employer | East | Country Club | SO | SO | Bedok |
| Inhouse Employer | East | School | SO | SO | Bedok |
| Serangoon Gardens Country Club | Central | Country Club | SO | SO | Bedok |
| Inhouse Employer | East | Country Club | SO | SO | Bedok |
| Inhouse Employer | East | Country Club | SO | SO | Bedok |
| Inhouse Employer | East | In-House | SO | SO | Bedok |
| Inhouse Employer | East | Country Club | SO | SO | Tampines |
| Inhouse Employer | East | In-House | SO | SO | Tampines |
| Inhouse Employer | East | School | SO | SO | Bedok |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Hotel | SO | SSO | - |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Eunos |
| Fervour Pte Ltd | East | Healthcare | SO | SO | Eunos |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Sengkang |
| Inhouse Employer | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Guthrie FMC Security Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Bulls-Eye Security Services Pte Ltd | East | Healthcare | SO | SO | Bukit Gombak |
| Prospect Protection Pte Ltd | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Aedge Services Pte Ltd | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Soverus Pte Ltd | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Inhouse Employer | East | School | SO | SO | Bedok |
