[1][2] After school Sittampalam joined St. Peter's College, Cambridge on a science scholarship and graduated with a degree in mathematics.

[1][2] He joined the civil service in 1923 and served in various positions including Assistant Government Agent and District Judge.

[6] He was persuaded to join the United National Party-led government and on 26 September 1947 he was sworn in as Minister of Posts and Telecommunication.

[9] He was defeated at the 1956 parliamentary election by the Illankai Tamil Arasu Kachchi (Federal Party) candidate V. A.

[1] In February 2004 Sri Lanka Post issued a commemorative stamp of Sittampalam.