Indiana Code Title 10. Public Safety § 10-16-2-5

Sec. 5. (a) The governor may appoint an honorary staff of aides with the brevet title of colonel, lieutenant colonel or major, or comparable naval rank.

(b) The staff officers hold office at the will of the governor.  Their commissions expire with the term of office of the governor making the appointment.

(c) The adjutant general shall be ex officio chief of staff.