PSA Timeline: 1990 – 1999
| Year | Information |
| 1997 | Referendum of SPSF members to amalgamate with the Public Sector Union (Federal public service union) forming the CPSU-SPSF. |
| 1994 | The PSA and Professional Officers Association (POA) amalgamate. |
| Year | Information |
| 1997 | Referendum of SPSF members to amalgamate with the Public Sector Union (Federal public service union) forming the CPSU-SPSF. |
| 1994 | The PSA and Professional Officers Association (POA) amalgamate. |