Mo. Rev. Stat. § 380.411: Officers, how selected, tenure.

Unless the articles of incorporation shall provide otherwise concerning the election of such officers, the directors shall elect from their number a president and a vice president. The directors shall also select a secretary and treasurer and such additional officers as they may deem necessary, who may or may not be members of the company. The offices of secretary and treasurer may be occupied by one person. Unless otherwise provided in the articles of incorporation, the term of all of such officers shall be not less than one year nor more than three years and until their successors are elected or selected and qualified.