PRISONS - Singapore Prison Service
 |
 |
 |
| Corporal | Sergeant | Staff Sergeant |
 |
 |
 |
 |
| Chief Warder (1) | Chief Warder (2) | Senior Chief Warder (1) | Senior Chief Warder (2) |
 |
 |
 |
 |
 |
| Rehabilitation Officer (1) | Rehabilitation Officer (2) | Assistent Superintendent | Deputy Superintendent | Superintendent |
 |
 |
 |
 |
| Assistent Director | Deputy Director | Senior Deputy Director | Director |