Indiana Code Title 4. State Offices and Administration § 4-12-1-4

Sec. 4. (a) Two (2) offices are created in the budget agency which shall be responsible to, and junior and subordinate to, the budget director.  The persons to fill the offices shall be appointed by the governor to serve at the governor's will and pleasure, shall not be adherents of the same political party, shall receive the salary fixed by the governor, shall give all of their time to the respective offices and to the budget agency, and each shall be a deputy budget director.  The director shall designate the order in which the deputy directors shall serve in the place and stead of the budget director in the event of the director's disability or absence.

(b) The budget director is authorized to employ staff members, assistants, employees, and clerks as the budget director shall require to discharge efficiently and economically the duties and functions and rights and powers of the budget agency.  Within this authority the director may employ on a part-time or advisory basis the services of experts in the field of public revenue and public finance and the administration as the services are desirable or necessary in the effective management and operation of the budget agency and in the discharge of its duties and functions.

(c) Promptly upon the receipt of a request from the budget committee, the budget director shall provide the assistants, employees, clerks, and experts as are reasonably required to permit prompt and efficient discharge of the duties and functions and work of the budget committee.  To the extent that assistants, employees, clerks, and experts ordinarily employed by the budget agency are available and are not required by the budget agency to execute and administer appropriations made by law, the budget director shall employ these persons to serve the budget committee.