The Executive shall appoint a Chief Administrative Officer, subject to confirmation by the Council. The Chief Administrative Officer shall be selected on the basis of qualifications as a professional administrator, skill in governmental budgeting and technical training for the duties of the office. The Chief Administrative Officer shall be a resident of the County within six months of appointment. The duties of the Chief Administrative Officer, which shall include supervising the departments, agencies and offices under the control of the Executive, advising the Executive on all administrative matters and performing such other duties as may be assigned by the Executive or by this Charter, shall be subject to the direction of the Executive. The Chief Administrative Officer shall serve at the pleasure of the Executive.