Ind. Code § 8-17-5-4

Sec. 4. The county highway engineer is entitled to a salary fixed by the county executive and shall be allowed actual traveling and other expenses incurred in the discharge of duties. The salary and expenses shall be paid out of county general funds, the county distribution of motor vehicle highway account funds, or both, and the county highway engineer fund. The county executive shall provide all facilities, equipment, and personnel required by the county highway engineer in the discharge of the engineer's duties.