- since 2019: Member of the International Academy of Astronautics (IAA)
- 2018 - 2019: Vice-Chair of the BRITE-Constellation Executive Science Team (BEST)
- since 2016: Austrian board member of the FP7 Project HELAS
- since 2015: Member of the TESS Asteroseismic Consortium (TASC)
- since 2014: Member of the BRITE-Constellation Executive Science Team (BEST)
- since 2014: Member of the UVMag Science Consortium
- since 2012: Chair of the BRITE-Constellation Ground Based Observations Team (Austria, Canada, Poland)
- since 2011: Member of the International Astronomical Union (IAU) and several divisions within
- since 2009: Member of the Kepler Asteroseismic Science Consortium (KASC)
- since 2009: Member of the CoRoT Science Consortium (France, Austria)
- since 2009: Member of the BRITE-Constellation International Advisory Science Team (BIAST)
- since 2007: Member of the PLATO Team, European Space Agency
- since 2005: CoRoT Co-Investigator (France, Austria)
- since 2004: Chair of the “CoRoT Pre-main Sequence Thematic Team”