| Date | Name | Organisation |
| 28-04-2009 | Detlef Sulzer | Sulzer Consulting Pty. Ltd |
| 30-04-2009 | Ian Godson | Ian Godson & Associates |
| 30-04-2009 | Noel Godson | Transbond Pty Ltd |
| 30-04-2009 | David Mahaffey | Mahaffey Associates Pty Ltd |
| 05-03-2020 | Tony Watson | RM Watson |
| 05-03-2021 | John O’Connell | Preservation Technologies |
