President of the Organizing Committee (OC) of Commission 7
"Celestial Mechanics and Dynamical Astronomy" (2009-2012) of the International
Astronomical Union (IAU), member of Commissions 15 and 20. Member of
the OC of Division A (Fundamental astronomy) and F (Planetary Systems and Bioastronomy) of the IAU. Former member of the
Resolutions Committee of the IAU.
Chairman of the Sub-Regional European Astronomy Committee (2009-2014).
Member of the Society of Astronomers of Serbia, of the Division for Planetary
Sciences and Division for Dynamical Astronomy of the American
Astronomical Society, and of the SPACEGUARD Foundation.
In charge of the
maintenance of
AstDyS site
(asteroid database and proper elements service).