- Chairman of the German-Japan Conference "Evolution Equations and Related Topics", München, 2009
- Global Organizing Comittee for Int.Conference "Mathematical methods in biosciences", München, 2008
- Global Organizing Comittee for Int.Conference "Dynamic Days" Poitiers, France, 2006
- Organizing Comittee for Intenational comittee dedicated to O.A.Ladyzhenskaya, 2005
- Scientific Comittee for International Conference, NPDE 2003, Alusta, Ukraine
- Scientific Committee for International Conference on Multifield Problems, Stuttgart, 2002
- Scientific Committee for International Conference dedicated to the 80th birthday of M.Vishik, Berlin, 2001
- Scientific Committee "ISAAC" Congress, Berlin, 2001
- Scientific Committee for International Conference dedicated to the 60th birthday of R.Temam, Paris and Poitier, 2000
- Referee for Humboldt Fellowship(Germany)
- Referee for PhD and Habilitation thesis (University of Marseille, Poitier, Bordeaux, France)
- Referee for DFG (Germany), Referee for VW-Foundation
- Scientific and Local Organizer Committee, Equadiff-99, Berlin
- Scientific Committee, Section 9 "Dynamical systems and ODE", ICM 98 (Berlin)