| Inhouse Employer | East | School | SO | SO | Serangoon |
| Inhouse Employer | Central | Hotel | SSO | SS | Simei |
| Security & Risk Solutions Pte. Ltd. | East | Office Building | SS | SS | Simei |
| SMS Security | East | Mix-Development | SSO | SS | Simei |
| Security & Risk Solutions Pte. Ltd. | East | Office Building | SS | SS | Simei |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Simei |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Simei |
| Premier Security Co-operative Ltd | East | In-House | Office Team | SSO | Simei |
| Premier Security Co-operative Ltd | Central | - | SS | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SS | Simei |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OM | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Simei |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SS | Simei |
| Force-One Security | North | Data Centre | SS | SSO | Simei |
| Force-One Security | North | Data Centre | OE | SSO | Simei |
| SMS Security | East | Mix-Development | SSO | SS | Simei |
| Certis Group | East | - | SO | SS | Simei |
| Certis Group | East | Gov Building | SO | SS | Simei |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Royal Security Management Services Pte Ltd | East | Gov Building | SO | SO | Simei |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Unique Security Services Pte Ltd | East | Condominium | SO | SO | Simei |
| Metropolis Security Systems Pte Ltd | East | Commercial | SO | SO | Simei |
| King's Security and Safety Management Pte Ltd | East | Commercial | SO | SO | Simei |
| Uniforce Security Services Pte Ltd | East | Commercial | SO | SO | Simei |
