What Sparky said is spot on, I co-drove for his driver back when he had the 8 truck. He can get a little hot under the collar sometimes and you have to be able to calm that instantly. A pissed off driver is a distracted driver! Be able to fix anything, take verbal and physical abuse well, and be two steps ahead of him at all times. We had no GPS then so Good memory was key, every, bump, hole, rock, etc. You must give the driver everything he needs!!!! Oh and when fixing the car hurry up every chance you get!