President of the Organizing Committee (OC) of Commission 7
(Celestial Mechanics and Dynamical Astronomy) of the International
Astronomical Union (IAU), member of Commissions 15 and 20. Member of
the OC of Division I (Fundamental astronomy) of the IAU. Member of the
Resolutions Committee of the IAU.
Member of Division for Planetary
Sciences and of Division for Dynamical Astronomy of the American
Astronomical Society, of the SPACEGUARD Foundation, and of the Society of Astronomers of Serbia.
Chairman of the Sub-Regional European Astronomy Committee.
Vice-chairman of the Board for Geosciences and Astronomy of the Ministry of Science and Technological Development of Serbia.
In charge of the
(asteroid database and proper elements service).