During his term in office, Sadigov was strong proponent of Azerbaijan cooperation with and eventual joining of NATO.

[2] The pro-western position of the country was declared by him on 4 December 1991, weeks before the official dissolution of Soviet Union.

Mr. Sadigov headed the Azerbaijani delegation to the United Nations' forty-sixth plenary meeting of the General Assembly in March 1992, during which the Azerbaijan Republic became a member of the United Nations.

In 1992, he was replaced by Tofig Gasimov and appointed the ambassador to Germany, Switzerland, Belgium, the Netherlands, Luxembourg and Austria.

In 2007, Huseynagha Sadigov was awarded with German Federal Cross of Merit for his service in developing the Azerbaijan-Germany relations.