Me. Rev. Stat. tit. 35-A, § 3739

The officers of a cooperative consist of a president, vice-president, secretary and treasurer, who must be elected annually by and from the board of trustees. When a person holding office ceases to be a trustee, that person ceases to hold office. The offices of secretary and of treasurer may be held by the same person. The board of trustees may elect or appoint other officers, agents or employees as it determines necessary or advisable and shall prescribe their powers and duties. Any officer may be removed from office and a successor elected in the manner prescribed in the bylaws.