Academic Positions
- University of North Carolina, Ernest Eliel Professor, 1991-
- Moscow Institute of Gas and Oil, Professor of Mathematics, 1985-1990
- Moscow State University, Research Scientist, 1974-1984
Visiting Positions
- Max-Planck-Institute, Bonn, May – June, 2018
- Hausdorff Institute, Bonn, May – July, 2017
- Max-Planck-Institute, Bonn, September, 2015 – June, 2016
- Max-Planck-Institute, Bonn, June, 2013
- IHES, France, May, 2012
- Hausdorff Institute, Bonn, January-April, 2012
- Max-Planck-Institute, Bonn, May-June, 2011
- IHES, France, July, 2011
- Centro di Ricerca Matematica, Pisa, June 2010
- Chaires d’Excellence Pierre de Fermat, Unversite Paul Sabatier, Toulouse, January-May 2010
- Hokkaido University, Sapporo, July 2009
- Ecole Polytechnique de Lausanne, Switzerland, May-June 2008
- Unversite Paul Sabatier, Toulouse, May-June 2006
- IHES, France, July, 2004
- ETH, Zurich, June, 2003
- Max-Planck-Institut, Bonn, July, 2002
- MIT, Boston, January-May, 2002
- Max-Planck-Institut, Bonn, May, July, 2001
- ETH, Zurich, June, 2001
- ETH, Zurich, June, 2000
- ETH, Zurich, June, 1999
- Max-Planck-Institut, Bonn, August, 1998
- ETH, Zurich, June-July, 1998
- ETH, Zurich, June, 1997
- IHES, Paris, May, 1997
- Harvard University, Boston, March, 1997
- ETH, Zurich, January, 1997
- Institute of H.Poincare, Paris, December, 1996
- IHES, Paris, July, 1996
- Harvard University, Boston, April, 1998
- MSRI, Berkeley, January-February, 1996
- University Paris 6, Paris, May, 1995
- University of Tokyo, Tokyo, June-July, 1994
- University of Leiden, Leiden, May, 1994
- RIMS, Kyoto, June, 1993
- IHES, Paris, May, 1993
- Max-Planck-Institut, Bonn, July 1992
- ETH, Zurich, June, 1992
- Institute for Advanced Study, Princeton, 1990-1991
- Bonn University, Bonn, January-March, 1977