1. International Mathematical Olympiads problem selection committee and jury member, 2006-present.
2. Author of one of the hardest problems ever proposed in the history of IMO. Details in the section "Hardest problem in IMO".
3. Author of problem solving and Olympiad style mathematics books.
4. Problem selection committee and jury member of International Olympiad of Metropolises, Moscow, Russia, 2016-present.
5. Problem selection committee and Jury member of International Zhautykov Olympiad, Almaty, Kazakhstan, 2006-present.
6. IMO problem selection committee and jury member (6 people), Astana, Kazakhstan, 51st International Mathematical Olympiad, 2010. Details in the section "International Mathematical Olympiads".
7. Professional coach for International Mathematical Olympiads (trained 1 Gold Medal winner, 4 Silver Medal winners, 15 Bronze Medal winners).
8. President of the Republican Mathematical Olympiads of the Republic of Armenia, 2011-2013 (and jury member 1996-2005, 2009-2013).
9. President and organizer of International Mathematical Olympiads “Tournament of Towns” in the Republic of Armenia, 1986-2013.
10. President of Yerevan’s state Mathematical Olympiads, Republic of Armenia, 1996-2013.
11. AwesomeMath year-round program (AMY), segment author, USA, 2015-2016.
12. Chief developer of multimedia software for Mathematics, ”Direct Skill Systems” CJSC, 2015-2016.