| 2020 - 2022 |
Member of the Jake Aggarwal Prize Committee of the IAPR (International Association for Pattern Recognition). |
| 2018 - 2020 |
Chair of the Jake Aggarwal Prize Committee of the IAPR |
| 1993-2019 |
member of the IEEE and the IEEE Computer Society. |
| 2016 - 2018 |
Member of the Jake Aggarwal Prize Committee of the IAPR |
| 2014 - 2016 |
Member of the Maria Petrou Prize Committee of the IAPR. |
| 2014 - 2016 |
ICPR 2016: Invited Speakers Chair. |
| 2010 - 2014 |
Chair of Advisory Committee of the IAPR |
| 2010 - 2012 |
Member of Fellow Committee of the IAPR |
| 2008 - 2010 |
Chair of Fellow Committee of the IAPR |
| 2006 - 2008 |
Chair of Nominating Committee of the IAPR |
| 2006 - 2008 |
Past President of the IAPR |
| 2004 - 2006 |
President of the IAPR. |
| 2002 - 2004 |
1st Vice-President of the IAPR. |
| 2000 - 2004 |
Member of the Scientific Steering Board of the Austrian Research Centers Seibersdorf (ARCS) |
| 1999 - 2004 |
Chair of the Scientific Board of the Area Electronics of the Austrian Research Centers Seibersdorf (ARCS) |
| 1998 - 2002 |
Treasurer of the IAPR. |
| 1996 - 1998 |
Initiation and chairman of a new IAPR-TC 15 on 'Graph based Representations'. |
| 1996 - 1998 |
member of IAPR Conferences and Meetings Committee. |
| 1994 - 1996 |
member of fellow committee of IAPR. |
| 1992 - 1994 |
Chair of IAPR Conferences and Meetings Committee. |
| 1987 - 1995 |
Founder and chairman of the independent nonprofit association "Österreichische Arbeitsgemeinschaft für Mustererkennung" (ÖAGM, Austrian Association for Pattern Recognition). |
| 1990 |
Founding member of the Society of Intelligent Robotics and Expert Systems (SIRES). |
| 1986 - 1990 |
Chair of IAPR Technical Committee 7 for Remote Sensing. |
| 1986 - 1988 |
Membership Committee of IAPR. |
| 1984 - 2011 |
Representative of Austria in the IAPR Governing Board. |
| 1984 - 2011 |
Member of the governing board of the "Österreichische Arbeitsgemeinschaft für Mustererkennung" (ÖAGM, Austrian Association for Pattern Recognition). |
| 1984 - 1990 |
IAPR Technical Committee 7 (TC7) for Remote Sensing. |