He served as Governor of the Central Bank of Sri Lanka, the permanent secretary of the Ministry of Finance & Treasury and an Alternate Executive Director of the International Monetary Fund (IMF).
[3] A. S. Jayawardena received his primary education at the St. Agnes Convent and St. Thomas' College, Matale.
Afterwards, he completed his secondary education at the Royal College, Colombo where he won the Henry De Mel Prize for Sinhala.
[3] In 1958, he joined the Central Bank of Ceylon as a junior executive and was promoted as Senior Economist Grade 2 in 1963.
In 1986, he returned to the Central Bank as its Deputy Governor and was later appointed Secretary to the Ministry of Industries, Scientific Affairs.