You will need to take a shuttle bus from the airport to the Hertz facility.

After you clear immigration, collect your bags and clear customs, you'll exit the international arrivals area. Continue outside to the curbside, following signs for the courtsey buses for rental cars. A yellow Hertz bus should be along in a few minutes. Get on board and continue to the facility. Get off, look for your name on the sign, and go to the marked spot where you'll find your car.