Tennessee Code Title 5. Counties § 5-21-107

(a) The director shall oversee the operation of the department in the functions established by this chapter, and shall be responsible for the implementation of the policies of the committee or such special committees established by the county legislative body.

(b) The director shall, among the director's duties, install and maintain a purchasing, payroll, budgeting, accounting and cash financial management system for the county.

(c) The director shall assist other county officials and employees in achieving an efficient financial management system for the county.

(d) The director has the authority to hire personnel for the finance department; provided, that the positions are funded in the annual budget and the personnel so hired meet the written job requirements as recommended by the director and approved by the committee.