From 1966 to 1986, he worked his way up the ranks in the Uzbek State Planning Committee, from chief specialist, to department head, to Minister of Finance of the Uzbek SSR, chairman of the State Planning Committee and deputy chairman of the Council of Ministers of the Uzbek SSR. In 1986, Karimov assumed the post of first secretary of the Kashkadarya Regional Committee of the Communist Party of Uzbekistan Committee of the Communist Party of the Uzbek SSR. In 1989, he became first secretary of the Central Committee of the Communist Party of the Uzbek SSR, after his predecessor Rafiq Nishonov failed to quell inter-ethnic clashes and instability in the Fergana Region. From 1990 to 1991, he served as a member of the Central Committee and Politburo. On 24 March 1990, he was elected the first President of the Republic by the Uzbek Supreme Soviet.