Don John Francis Douglas Liyanage, CCS was a former Sri Lankan civil servant.
Having gained his BSc from the University of Colombo, Liyanage gained admission and was appointed to the Ceylon Civil Service by the Public Service Commission in April 1950.
Promoted to Officer Class 2, in August 1952, he was appointed Additional Assistant (Hambanthota) to the Government Agent of the Southern Province.
[1] In 1963 he was named as the first accused of the attempted coup d'état in 1962 by the state prosecution.
Even though he was convicted along with 11 others accused in 1963, the Privy Council, in its ruling given in December 1965, held the Special Act of 1962 ultra vires of the Ceylon constitution and said that the Act had denied fair trial.