From 2002 — representative of the Russian Academy of Sciences in the International Union of Academies (Union Académique Internationale), in 2017-2021 — Vice-President of the Union. Member of the Russian Foundation for Humanities (RGNF) Council (2010-2016), Deputy Chairman of the Science Council under the Ministry of Education and Science of the Russian Federation (2013-2019). Member of the Commission for Evaluating the Effectiveness of Scientific Organizations of the Federal Agency for Scientific Organizations (FANO) of Russia, where he was elected in 2014 as a result of voting by employees of academic institutes (received the greatest number of votes in the direction "Historical-Philological Sciences") (2014-2019), Member of the Commission of the Ministry of Science and Higher Education for the Evaluation of Universities (2019-2021). In 2018, created and headed the "Centre for Antique and Oriental Archaeology" of the Institute of the Classical Orient and Antiquity of the National Research University Higher School of Economics.
Deputy Chairman of the RAS Commission for Combating Pseudoscience, Deputy Editor-in-Chief of the journal "Herald of the Russian Academy of Sciences" (2017-2023). Editor-in-Chief of the journals "Vestnik Drevnei Istorii" (Journal of Ancient History) (since 2009) and "Ancient Civilizations from Scythia to Siberia" (Brill) (since 2002).
Member of the editorial boards of the journals "Materialy po Arkheologii i Istorii Antichnogo i Srednevekovogo Severnogo Prichernomoria" (Chairman of the International Council), "Antichnyi Mir i Arkheologia" (The Ancient World and Archaeology), Saratov, "V Zashchitu Nauki" (In Defense of Science), Moscow, "Egypt and Adjacent Countries", Moscow, "Nizhnevolzhskiy Arkheologicheskiy Vestnik" (Lower Volga Archaeological Bulletin), Volgograd, "Orientalistika" (Oriental Studies), Moscow, "Anatolian Research - Anadolu Araştırmaları", Istanbul, "Il mar Nero", Rome, Paris, Bucharest, "Nartamongæ. Revue des études alano-ossétiques", Paris, Vladikavkaz, "Orpheus", Sofia, "Propontica", Istanbul, Samsun, "Revue archéologique", Paris, "Revue des études anciennes", Bordeaux, "Ricerche ellenistiche", Venice.

Fellow of the Alexander von Humboldt Foundation (1993—1995), Laureate of the Friedrich Wilhelm von Bessel Prize (Germany, 2002).
Invited for scientific work and teaching at the University of Fribourg and the University of Bern (Switzerland, 1990—1992), Heidelberg University (Germany, 1993—1995), the Center for Hellenic Studies in Washington (1996—1997) and the Institute for Advanced Study in Princeton (USA, 2001—2002), the University of Strasbourg (1997—1998) and the National Center for Scientific Research in Bordeaux (France), the Swedish Collegium for Advanced Study in Uppsala (Sweden, 2008). Repeatedly invited to give reports at international conferences.
Participant and leader of archaeological expeditions in southern Russia, Ukraine, Bulgaria, Greece, Turkey, Italy. Editor-in-Chief of the Russian-German book series "Steppe Peoples of Eurasia", "Corpus tumulorum scythicorum et sarmaticorum" (jointly with G. Parzinger) and "Pontus Septentrionalis". Head of international scientific projects "Corpus of Greek and Latin Inscriptions of the Northern Black Sea Region" (IOSPE) and "Kelainai — Apamea Kibotos: A Royal Residence in Phrygia" (jointly with L. Summerer, University of Munich).

Foreign Corresponding Member of the Institut de France (Académie des Inscriptions et Belles-Lettres), 2016; Corresponding Member of the German Archaeological Institute, 2002; Corresponding Member of the Italian Institute for Africa and the Orient, 2004; Friedrich Wilhelm von Bessel Award (Germany), 2003.