He contested the first Parliamentary elections in 1947 from the Colombo Central constituency and was returned as the 3rd Member of Parliament obtaining 15,435 votes. On his proposal in June 1948 for a Bribery Commission, the first Bribery and Corruption Commission was formed chaired by his father Justice A.E. Keuneman. In the 1952 elections, he was elected as the first MP for Colombo Central electorate defeating the labour party leader A.E. Goonesinghe and retained his seat in the 1956, 1960 and 1970 elections. He was very critical of the 1962 coup d'état attempt and the 1971 JVP Insurrection.