 From 1961 to 1969 he worked at the Ural State University.From 1970 to 1993 he worked at the Institute of Mathematics and Mechanics of the Ural Branch of the USSR Academy of Sciences (later, of the Russian Academy of Sciences) in Yekaterinburg (from 1986 to 1993 he was the chief of the Institute).In 1971 he defended his second thesis and received the rank of professor in 1973.