New York Consolidated Laws, County Law - CNT § 204. Positions of employment

In addition to those positions of employment specifically provided by law, the board of supervisors shall have power to establish positions of employment and may abolish the same.  The establishment and abolition of such positions may be by local law, by resolution or by the adoption of the budget.  Rules may be adopted providing for the temporary transfer of employees from one office or department to another as authorized by the civil service law.

Except as otherwise provided by law, all officers paid from county funds and all boards or commissions, by whatever title known, shall appoint or employ all subordinates and employees in their respective offices and departments.