He is a senior adviser to the Prime Minister of Sri Lanka and former Secretary to the Treasury.

[1][2][3] He is the son of J. C. Ratwatte Adigar, a member of the State Council of Ceylon, who hailed from a prominent Radala family from the Kingdom of Kandy.

He was later appointed as Permanent Secretary to the Ministry of Youth Affairs.

Since 1994, he has been the managing director of the Sri Lanka Business Development Centre, with the exception of 2002 to 2004, when he was appointed as Secretary to the Treasury and Ministry of Finance.

Their son Jayampathy Charitha Ratwatte IV is a social entrepreneur and corporate executive and their daughter Prashanthi Tehanee Ratwatte is an Associate Director at Kelley School of Business.