After qualifying Duraiswamy worked as an advocate, becoming a crown advocate and leader of the Jaffna Bar. Duraiswamy contested the
1921 Legislative Council election as a candidate in Northern Province and was elected to the
Legislative Council. He contested the
1924 Legislative Council election as a candidate in Northern Province West and was re-elected unopposed. He was a leading member of the
Jaffna Youth Congress which advocated the boycott of the
1931 State Council elections. The boycott ended in 1934 but Duraiswamy did not contest the ensuing by-elections. He did however contest the
1936 State Council election as a candidate in Kayts and was elected to the
State Council unopposed. Duraiswamy was elected
Speaker of the State Council on 17 March 1936. He held this position until the State Council was replaced in 1947. Duraiswamy was knighted by King George VI in London in the
1937 Coronation Honours. Duraiswamy contested in
Kayts at the
1947 election but failed to get elected to the new
Parliament after coming fourth. A wave of Tamil nationalism represented by the Tamil Congress had swept away the old guard of the legislature at the 1947 elections. Duraiswamy was one of the founders of the Hindu Board of Education and served as its president in 1923. He was a founder and president of the Tamil Union. ==Death==