Membership:

• Honorary Fellow of International Association of Geodesy, assigned in IAG General Assembly in Montreal – Canada, July 2019

• Chair of IAG JWG 4.3.3 ‘Combination of Observation Techniques for Multi-dimensional Ionosphere Modeling’ a joint Working Group of IAG and GGOS; 2015 - 2019
• Member of International GNSS Service (IGS) Ionosphere Working Group; Since March 2013.
• Member of IGS Bias and Calibration Working Group; since March 2009.
• Member of International Committee on Global Navigation Satellite System (ICG) - Working Group A; December 2008.
• Member of European Geosciences Union (EGU); since 2008.
• Member of American Geophysical Union (AGU) – Geodesy section; since 2008.