You can google for information... its an open secret.

s://.salary.sg/2015/salary-scale-civil-service-servant-singapore/

Pay grade: MX9 (Superscale)
Job title: Deputy Director, Director
Salary scale: S$11,110 – S$15,280 / S$15,280 – S$17,370

Pay grade: MX10
Job title: Assistant Director, Deputy Director
Salary scale: S$7,000 – S$9,980 / S$9,980 – S$11,470

Pay grade: MX11
Job title: Manager, Assistant Director
Salary scale: S$4,740 – S$7,115 / S$7,115 – S$8,305

Pay grade: MX12
Job title: Assistant Manager, Manager
Salary scale: S$2,945 – S$5,925

Pay grade: MX13
Job title: Management Executive
Salary scale: up to S$3,000 for fresh graduates