| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| Aspectus Consultancy Pte Ltd | Central | Mix-Development | SO | SSO | Pasir Ris |
| Premier Security Co-operative Ltd | East | In-House | Office Team | SSO | Hougang |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSO | Hougang |
| Ascentiaa Security Management Pte Ltd | East | Condominium | SSO | SSO | Pasir Ris |
| Star Security Services | Island Wide | - | Security Mgt | SSO | Hougang |
| Young Women's Christian Association of Singapore | Central | In-House | Security Mgt | SSO | Hougang |
| Acestes Pte Ltd | Central | - | Security Mgt | SSO | MacPherson |
| TwinRock Global | Central | - | Security Mgt | SSO | MacPherson |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | MacPherson |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SSO | MacPherson |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Choa Chu Kang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Choa Chu Kang |
| Inhouse Employer | Central | In-House | SS | SSO | Hougang |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SSO | Simei |
| Ranger Investigation & Security Services Pte Ltd | Central | Condominium | SO | SSO | Woodlands |
| Premier Security Co-operative Ltd | Central | - | SS | SSO | Simei |
| 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 | North | Commercial | SO | SSO | Bukit Gombak |
| Inhouse Employer | North | In-House | SO | SSO | Bukit Gombak |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Tiong Bahru |
| Unique Security Services Pte Ltd | South | Condominium | SO | SSO | Tiong Bahru |
| Reachfield Security & Safety Management Pte Ltd | Central | Gov Building | SO | SSO | Tiong Bahru |
