Mo. Rev. Stat. § 115.045
Each election authority shall have the authority to employ such attorneys and other employees as may be necessary to promptly and correctly perform the duties of the election authority. Where an electronic voting system or voting machines are used, the election authority shall designate competent employees to have custody of and supervise maintenance of the voting equipment. Board of election commissioners' employees shall be subject to the same restrictions and subscribe the same oath as members of the board of election commissioners, except that no employee of a board of election commissioners shall be required to post bond or reside and be a registered voter within the jurisdiction of the election authority unless directed to do so by the board. Employee oaths and any bonds shall be filed and preserved in the office of the board.
§ 115.045, RSMo