| Hans Schabus | December 2011 - February 2012 | |
| Sudarshan Shetty | January - January 2009 | |
| Navin Thomas | April - June 2009 | |
| Thomas Helbig | September - October 2009 | |
| Marcus Geiger | February - March 2010 | |
| Suhasini Kejriwal | August - September 2010 | |
| Clarina Bezzola | October - December 2010 | |
| Christian Eisenberger | May - May 2013 |