1983 - 1989: Inst. Low Temp. Physics, Kharkov, junior research fellow
1989 - 1991: Inst. Low Temp. Physics, Kharkov, research fellow
1991 - 2000: Inst. Low Temp. Physics, Kharkov, senior research fellow
2000 - 2016: Inst. Low Temp. Physics, Kharkov, leading research fellow
2016 - present: Inst. Low Temp. Physics, Kharkov, head of the division of Mathemetical Physics.

2003 Invited speaker of European Congress of Mathematics in Stockholm
2009 Prise named by Ostrogradskiy of National Academy of Sciences of Ukraine
2012 Elected as a member of National Academy of Sciences of Ukraine

- Laboratoire de Physique Mathematique et Geometrie, Universite Paris-7, chercheur invite ( 1 month 1992, 3 months 1993, one month 1994)
- Laboratoire de Physique Mathematique et Geometrie, Universite Paris-7 chercheur associe, accorde par le C.N.R.S. (3 months 1995, 3 months 1996)
- Institut of mathematics Jussieu chercheur associe, accorde par le C.N.R.S. (1 month 2002)
- Facultat und Institut fur Mathematic, Ruhr Universitat, Bochum (1 month 1993, 1995, 1996, 1997)
- Mathematical Department of University ”La Sapienza” of Rome (1 month 1991, 1993, 1994, 1995, 1996, 1997, 1998)
- Institut of mathematics Jussieu chercheur associe, accorde par le C.N.R.S. (1 month 2002)
- Physical Department of University ”La Sapienza” of Rome ( 3 months 1999, 2001, 2002, 2003, 2004, 2005, 2006) (1 month 2008, 2011)
- Institute Henri Poincare (Paris) (3 months 2007)
- Mathematical Science Research Institute (Berkley, California) (1 month 2010)
- University of Toronto (1 month 2010)
- University of Marseilles (1 month 2013)
- Stony Brook University (1 month 2015)
- Summer Program on Random Matrices of Park City Mathematical Institute, Park City Utah USA (25 June - 15 July, 2017)
- Program on QUANTITATIVE LINEAR ALGEBRA, IPAM, Los Angeles (30 April - 03 June, 2018)

• XI International Congress of Mathematical Physics, Paris, July 1994 (invited short communication).
• International Conferens in Stochastic Processes, Bonn, October 1994 (invited speaker), 5th European Symposium in Stochastic Analysis Bonn, Germany 1994, (invited speaker).
• International Conference on Stochastic Methods in Statistical Mechanics, Finances and Biology , Bielefeld, Germany, 1996, (invited speaker).
• International Conference on the Disordered Spin Systems, Berlin, Germany 1996, (invited speaker).
• International Workshop in Statistical Physics Bielefeld, Germany, 1996, (invited speaker).
• International conference ”Mathematical Physics- Today, Priority Technologies for Tomorrow”. Kiev, 1997, (invited speaker).
• Sattelite Colloquium of STATPHYS 20 ”Mathematical Results in Statistical Mechanics”. Marseille, 1998 (invited speaker).
• International conference ”Mathematical aspects of Statistical Mechanics”. Marseille, 2002 (invited speaker).
• International conference ”Physics and Mathematics of Large N limit in Gauge Theory” Mountreal, January, 5-9 2004 (invited speaker).
• 4 Europian Congress in Mathematics. Stockholm, June, 27- July 03, 2004 (invited ECM speaker).
• International conference ”Mathematical Physics of Spin Glasses”, Cortona, June 27-July 2 2005 (invited speaker).
• First annual conference of the EU network ”Phenomena in High Dimensions” Conference on Convex Geometry and High Dimensional Phenomena Vienne, July 20-27, 2005 (invited speaker).
• International Conference on Costractive Complex Approximation Theory Nizhnii Novgorod - Moscow: August, 27- September 03 2005
• Workshop ”Limit Theorems and Characterization problems in Statistics and Probability” Bielefeld: December 5-7 2005 (invited speaker).
• International Conference on Costractive Complex Approximation Theory. Ambleteuse, France May,25-30, 2006 (invited speaker).
• Second annual conference of the EU network ”Phenomena in High Dimensions” Conference on Convex Geometry and High Dimensional Phenomena Paris: July 07-14, 2006 (invited speaker).
• Luminy conference on random matrices. Marseille, France: October,30- November,03, 2006, (invited speaker).
• Workshop ”Random matrices: probabilistic aspects and applications”, Bonn, Germany, January 14-18, 2008, (invited speaker).
• Workshop: Disordered Systems: Random Schrodinger Operators and Random Matrices March 23rd - March 29th, 2008 (invited speaker).
• Workshop on High-Dimensional Phenomena in Mathematical Physics, Paris-Marne-laValle, June 2-6, 2008 (invited speaker).
• Workshop ”Disordered systems: spin glasses”, Mountreal, June 8-13 2009 (invited speaker)
• International conference ”The State of Geometry and Functional Analysis” Tel-Aviv, June 24-30, 2009 (invited speaker)
• International conference Asymptotic Geometric Analysis, Euler International Mathematical Institute, St. Petersburg, Russia, June 30 - July 4, 2010 (invited speaker)
• Workshop Random Matrix Theory and its Applications, MSRI, Berkeley, USA, September 13-17 2010 (invited speaker).
• Workshop Connections for Women: An Introduction to Random Matrices, MSRI, Berkeley, USA, September 20-21 2010 (invited speaker).
• Concentration period on Partial Differential Equations and Geometric Analysis on Workshop on Geometric Probability and Optimal Transportation, Toronto, Canada, October 25-29, 2010 (invited speaker)
• Workshop ”Vector equilibrium problems and their applications to random matrix models” AIM, Palo Alto, USA April 2012 (invited speaker).
• Workshop ”Mathematics and Physics of Disordered Systems” Cambridge, UK, September 2012 (invited speaker)
• Random Matrix Workshop / Paris-Telecom, October 2012 (invited speaker)
• Mathematical Physics of Disordered Systems A Conference in Honor of Leonid Pastur University of Hagen, Germany, May 2013 (invited speaker)
• Advanced School and Workshop on Random Matrices and Growth Models, Treste, Italy September 2013 (invited speaker)
• Memorial conference dedicated to the memory of academician Andrei Aleksandrovich Gonchar November 2526, 2013, Steklov Mathematical Institute of RAS, Moscow (invited speaker)
• Workshop on Random Matrices and Random Systems at Institute for Advanced Study, Princeton, USA March 31- April 4, 2014 (invited speaker)
• II International Conference ANALYSIS AND MATHEMATICAL PHYSICS (AMPH2014) 16-20 June, 2014 Kharkov, Ukraine (invited speaker)
• Conference ”Mathematical Physics: Theory and Applications” 18-20 Sept University ”La Sapienza” of Rome, Italy (invited speaker)
• Workshop ”Random Matrices and Their Applications ”, 5-9 January, 2015, Hong Kong (invited speaker)
• Workshop ”Random and Other Ergodic Problems” 22-26 June, 2015, Cambridge (invited speaker)
• CIMPA Summer School in Buenos Aires (July 6-17, 2015) (invited lecturer)
• Conference on Geometric Functional Analysis in Honour of Nicole Tomczak-Jaegermann Edmonton, 15-20.05.2016 (invited speaker)
• Workshop ”Probability and asymptotic analysis in strongly coupled systems” 11-16 January, 2016, Bonn (invited speaker)
• Summer School ”Spectral Theory, Differential Equations and Probability” Mainz, 05-15 September 2016 (invited lecturer)
• Conference ”Classical and Quantum Motion in the Disordered Environment December 18-22, 2017, Queen Mary University of London (invited speaker)
• Workshop Random Matrices and Free Probability Theory (IPAM, UCLA, Los Angeles) MAY 14 - 18, 2018 (invited speaker)
• International Conggress in Mathematics August, 1-9, 2018 Rio de Janeiro (invited speaker)

Mathematical problems of statistical physics, neural networks and spin glass theories, spectral theory of random matrices.