The Sri Lanka Administrative Service (SLAS) is the key administrative service of the Government of Sri Lanka, with civil servants working for both in the central government as well as in the provincial councils. It was formed as the Ceylon Administrative Service (CAS) in 1963 as the successor to the Ceylon Civil Service which was abolished on May 1, 1963.

 Sri Lanka Administrative Service Association (SASA) is the trade union of the Sri Lanka Administrative Service officers which exercises their right to freedom of association – a fundamental right under the Constitution of Sri Lanka. It is a registered trade union under the Trade Union Ordinance No 14 of 1935, thus the members and officers of the Association enjoys all protections, privileges and immunities afforded to a registered trade union.