"The Permanent Secretary, in most departments officially titled the Permanent Under-secretary of State or PUS (although the full title is rarely used), is the most senior civil servant of a British Government ministry, charged with running the department on a day-to-day basis.Permanent Secretaries (known by other names in some departments; see below) are the non-political civil service heads (and \"accounting officers\") or chief executives of government departments, who generally hold their position for a number of years (thus \"permanent\") at a ministry as distinct from the changing political Secretaries of State to whom they report and provide advice."@en .