Dissanayake claimed a silver medal at the 2016 South Asian Games. His next silver medal at the 2018 Commonwealth Games was the first silver medal for Sri Lanka at those Games. His medal was also the third medal clinched by Sri Lankan team during the Gold Coast Commonwealth Games and was also the third medal received by Sri Lanka in weightlifting category after couple of bronze medals secured by Chaturanga Lakmal and Dinusha Gomes at the 2018 Commonwealth Games.