Tenn. Code Ann. § 54-12-311: Engineer employed to supervise construction of improvement work - Compensation - Removal, and contract with another

(a) The board of directors shall employ a competent engineer to have charge and supervision of the construction of the improvement work, contract for compensation for the engineer's services in a sum or at a rate that may be agreed upon, and to be paid as other expenses of the district.

(b) The directors may remove the engineer and contract with another, if they see fit for any reason.