| since 2018 | Vice-president of the Constitutional Court | 
| 2015 - 2018 | Judge of the Constitutional Court | 
| 2012 - 2014 | President of the National Commission on Taxation ("Landessteuerkommission") | 
| 2010 - 2012 | President of the National Commission on Real Property Transactions ("Landesgrundverkehrskommission") | 
| 2005 - 2012 | President of the Appeals Commission on Administrative Matters |