In the
1977 General Elections Dissanayake contested the Hanguranketha Electorate from the
Communist Party but was defeated. Dissanayaka contested for the
parliamentary election in 1994 under the
People's Alliance from the Nuwara Eliya district and was elected to parliament with 38372 votes. He served as the Cabinet Minister of Samurdhi affairs, Youth Affairs and Sports under President
Chandrika Kumaratunga. In 2001, Dissanayaka and other eight ministers from the PA government crossed over to the
United National Party which was a crucial factor in the downfall of the incumbent PA government.In 2002 he was assigned as the Cabinet Minister of Samurdhi and Agriculture in the UNP government under prime minister
Ranil Wickramasinghe in addition to being elevated to National Organiser of the party. In December 2009, Dissanayaka crossed over again, to the SLFP.Dissanayake lost his cabinet position after Rajapaksha was defeated at the 2015 presidential election in Sri Lanka. His controversial statement about former president Chandrika Kumaratunge was criticized by many in the run up to the polls in 2015. Dissanayake joined the National government in 2015 led by the
United National Party as the Minister of Rural Economic Affairs. He was appointed as Minister of Industry by President Gotabaya Rajapaksa on 3 March 2022. ==Controversies==