| Schauer Dagmar | 1989 | 1991 |
| Martin Margot | 1991 | 1993 |
| Guggenmos Alber | 1993 | 1994 |
| Volk Wolfgang | 1994 | 2000 |
| Schweiger Florian | 2000 | 2008 |
| Karg Markus | 2008 | 2012 |
| Edenhofer Veronika | 2012 | 2015 |
| Schauer Dagmar | 1989 | 1991 |
| Martin Margot | 1991 | 1993 |
| Guggenmos Alber | 1993 | 1994 |
| Volk Wolfgang | 1994 | 2000 |
| Schweiger Florian | 2000 | 2008 |
| Karg Markus | 2008 | 2012 |
| Edenhofer Veronika | 2012 | 2015 |