The manager shall be responsible to the governing body for the proper administration of all affairs of the first or second class municipality placed in his or her charge. To that end, except as otherwise provided by law, he or she shall have power to appoint and remove all officers and employees in the administrative service of the municipality and may authorize the head of any department or office responsible to him or her to appoint and remove subordinates in the department or office. Appointments made by or under the authority of the manager shall be made without definite term on the basis of executive and administrative ability and of the training and experience of such appointees in the work which they are to perform.
(SDCL § 9-10-13)