Mich. Comp. Laws § 4.1106
The director of the bureau shall be the chief administrative officer of the bureau. With the approval of the council, the director shall employ such employees as may be necessary and fix their compensation within the appropriation made by the legislature for this purpose. Persons employed by the director shall be nontenured, at-will employees. The director may discipline, transfer, demote, suspend, or summarily discharge an employee. The director shall have charge of the routine management of the bureau and may incur such expenses as may be necessary for carrying out the provisions of this act, to be paid out of appropriations made by the legislature for the operation of the bureau. The council shall be responsible for the general program and policies of the bureau and for the preparation and enforcement of rules and regulations concerning the services to be rendered.
MCL 4.1106