The directors may contract for the services of or employ a manager, an engineer, professional assistants, and such other employees as are necessary and provide for their qualification, duties, and compensation, which, with all other expenses, shall be included as a part of cost of any project. The directors may require any officer or employee of the district to hold a bond for faithful performance of his duties, in a prescribed amount, the cost thereof to be paid from funds of the district. Source: SL 1984, ch 293 , § 33.