National Observatory of Athens

• Elected Director and President of the Governing Board for the term 2017-2020
• Elected member of Governing Board for the term 2004-2006 (representative of the researchers)
• Substitute Director of the Institute of Astronomy & Astrophysics (2011-2012)
• President of the Scientific Advisory Committee of the Institute of Astronomy & Astrophysics (2006-2008)
• Member of the Scientific Advisory Committee of the Institute of Astronomy & Astrophysics (2004-2006)

NOESIS (Thessaloniki Science Center & Technology Museum)

• appointed Member of the Governing Board and Vice-President for term 2015-2018

GNCA (Greek National Committee for Astronomy)

• appointed for term 2001-2003 (substitute member)
• appointed for term 2003-2005 (substitute member)
• appointed for term 2008-2010 (substitute member)

HSRGC (Hellenic Society on Relativity, Gravitation and Cosmology)

• Elected member of governing board for term 2009-2011