| Ranger Investigation & Security Services Pte Ltd | Central | Condominium | SO | SSO | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Yishun |
| Premier Security Co-operative Ltd | North | Commercial | SO | SO | Yishun |
| AETOS Holdings Pte Ltd | West | - | SO | SO | Yishun |
| Certis Group | East | Gov Building | SO | SO | Yishun |
| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Yishun |
| Force-One Security | Central | Commercial | SO | SO | Yishun |
| Inhouse Employer | East | In-House | SO | SSS | MacPherson |
| Inhouse Employer | East | School | SO | SSS | MacPherson |
| Inhouse Employer | East | Country Club | SO | SSS | MacPherson |
| Elitez Security Pte Ltd | West | Commercial | SO | SS | Yishun |
| Elid Technology International Pte Ltd | North | Condominium | SO | SS | Yishun |
| AETOS Holdings Pte Ltd | West | - | SO | SSO | Bukit Gombak |
| Concorde Security Pte Ltd | Central | Commercial | SO | SSO | Redhill |
| Dorsett Singapore | Central | Hotel | SO | SSO | Redhill |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Inhouse Employer | North | Commercial | SO | SSO | Bukit Gombak |
| Inhouse Employer | West | Industrial / Factory | SO | CSO | Boon Lay |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| GATES PCM Integrated Services Pte Ltd | East | Condominium | SO | SO | Sengkang |
| Straits Retail Property Management Services Pte. Ltd. | Central | In-House | SO | SS | Pioneer |
| Inhouse Employer | North | In-House | SO | SSO | Bukit Gombak |
| Inhouse Employer | North | In-House | SO | SS | Yishun |
