| Inhouse Employer | South | In-House | SO | SO | Jurong East |
| Dorsett Singapore | Central | Hotel | SO | SO | Jurong East |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Elid Technology International Pte Ltd | East | Condominium | SO | SO | Pasir Ris |
| SMS Investigation & Security Pte Ltd | East | Condominium | SO | SO | Pasir Ris |
| Royal Security Management Services Pte Ltd | East | Gov Building | SO | SO | Pasir Ris |
| Elid Technology International Pte Ltd | East | Condominium | SO | SO | Pasir Ris |
| AETOS Holdings Pte Ltd | West | - | SO | SSO | Boon Lay |
| Inhouse Employer | South | In-House | SO | SO | Pasir Ris |
| Inhouse Employer | South | In-House | SO | SSS | Woodlands |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Force-One Security | North | Data Centre | SO | SS | Marsiling |
| Certis Group | Island Wide | - | SO | Nil | Bencoolen |
| Certis Group | North | - | SO | Nil | Marsiling |
| Inhouse Employer | North | Commercial | SO | SSO | Choa Chu Kang |
| Elid Technology International Pte Ltd | West | Condominium | SO | SO | Choa Chu Kang |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Commercial | SO | SSO | Pasir Ris |
| Inhouse Employer | North | Commercial | SO | SS | Choa Chu Kang |
| Certis Group | Central | Commercial | SO | SS | Choa Chu Kang |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SO | SSO | Simei |
| Certis Group | Central | Commercial | SO | SS | Choa Chu Kang |
| Certis Group | North | - | SO | Nil | Marsiling |
| Certis Group | Central | Healthcare | SO | SS | Holland Village |
| Certis Group | Central | School | SO | Nil | Jurong East |
