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He entered the Sri Lanka Parliament in February 1989 as a nominated Member on the National List, In 1994, he was elected to parliament from the Kandy District representing the Sri Lanka Freedom Party and was appointed by Chandrika Kumaratunga, his niece as Cabinet Minister for Power and Energy and Deputy Defense Minister.
Moragoda was first entered to Parliament as a National List Member in 2000 with the United National Party (UNP) and was reelected in 2001 and in 2004 from the Colombo District.