INDIAN ADMINISTRATIVE SERVICE.It is a leading administrative civil services in India.They have a lot f powers and an be appointed as officers in a no  of jobs.
The Indian Administrative Service (IAS).IAS officers hold key and strategic positions in the Union GovernmentStates[2] and public-sector undertakings . Recruitment to the Indian Administrative Service is done through an extremely competitive examination called the "Civil Services Examination", organized by the Union Public Service Commission (UPSC)

the functions of an IAS officer is

To handle the daily affairs of the government, including framing and implementation of policy in consultation with the minister-in-charge of the concerned ministry which requires supervision and proper enforcement at ground realities.

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