Central Secretariat Service

Central Secretariat Service (Hindi: केंद्रीय सचिवालय सेवा; abbreviated as CSS) is the administrativecivil service under Group A and Group B of the Central Civil Services of the executive branch of the Government of India. They are governed by Central Secretariat Service Rules of 1962, which has been issued under the powers of Article 309 of the Constitution of India. The service members work under restrictions and rules of Central Civil Services (Conduct) Rules.

The service serves as the backbone of administrative work and provides permanent bureaucracy and functionary staff in the Union Government ministries, Cabinet Secretariat, Central Secretariat and other offices of Government of India.

On October 1 every year, the service celebrates CSS day, which marks the anniversary of its establishment.