The Ministers and Chiefs of the Defence Staff are supported by a number of civilian, scientific and professional military advisors. The Permanent Under-Secretary of State for Defence (generally known as the Permanent Secretary) is the senior civil servant at the <answer>MoD</answer>. His or her role is to ensure the <answer>MoD</answer> operates effectively as a department of the government.
Where does the Permanent Secretary serve as the senior civil servant?
MoD