The Ministry of External Affairs and Defence was a cabinet ministry of the Government of Ceylon that conducted and managed all of Ceylon's relations with other countries and its military matters from 1947 to 1977.
The ministry was formally established in 1948 following the independence of Ceylon as the Ministry of External Affairs and Defence, coming under the direct control of the Prime Minister of Ceylon.
In 1977, J.R Jayawardena's government adapted two separate ministries, forming the Ministry of Defence and the Ministry of Foreign Affairs.
[citation needed] The following list of Ceylon Civil Service Class 1 officers who held the post of Permanent Secretary to the Ministry of Defence and External Affairs:[1] Incomplete