The Central Superior Services (denoted as CSS; or Bureaucracy) is a permanent elite bureaucratic authority, and the civil service that is responsible for running the civilian bureaucratic operations and government secretariats and directorates of the Cabinet of Pakistan. The country's civil service is headed by the Establishment Secretary of Pakistan, who reports directly to the Prime Minister. The Prime Minister is the final authority on all matters regarding the civil service.
The civil service defined itself as "key wheels on which the entire engine of the state has to move." Derived from the colonial legacy of the former Indian Civil Service, the civil service came into its modern formation immediately after the establishment of Pakistan as a "Civil Service of Pakistan." During its time of formation, the bureaucracy produced Ghulam Ishaq Khan who would go on to become the President of Pakistan. It had influence on many of the state's defence, internal, foreign and financial policies. In 1971, it was re-organized and reestablished under "Chapter I: Part-XII, Article 240" of the Constitution of Pakistan which gave it foundation and constitutional status. The civil bureaucracy closely collaborated with the military establishments of Pakistani Armed Forces in issues concerning the national security. The bureaucracy consists of 12 directorates that provide vital office and secretariat related duties to the Government of Pakistan. The highest attainable rank in the country's bureaucracy is BPS-22 grade.
The Civil Service of Pakistan selects only 7.5% of the applicants by , education, qualification and experience while the 92.5% are selected by a quota system. The civil service exams are competitive and provides equal opportunities to males and females, depending on their qualifications. The CSS Examinations are held at the start of every year. The exams are conducted and supervised by the Federal Public Service Commission. CSS exams have a reputation of a very low pass percentage, in 2015, only 3% of the 12,176 participants cleared the multi-staged exam.