Complex sentence: From 1989 to 1991 he was Deputy Director of the Department of International Organisations in the Soviet Foreign Ministry, and from 1991 to 1993 he was Deputy Director of the Department of International Scientific and Technical Cooperation in the Russian Ministry of Foreign Affairs.
Split into simpler sentences: From 1989 to 1991, Kislyak was Deputy Director of the Department of International Organisations at the Soviet Foreign Ministry. From 1991 to 1993, Kislyak was Deputy Director of the Department of International Scientific and Technical Cooperation at the Russian Ministry of Foreign Affairs.