T.C knows and says a good grounds man can start by being alert. They need to gas up the saws and get the gear of the back of the truck. Then they should makes sure the chains are tight. Next they can follow the climber to the tree and ask if anty thing else is needed, and they should notice if the prunner will be needed for getting hangers out. Then they should watch the climber as he goes up and keep the tangles out of the rope. Then they should be ready to tie a saw on or lowering rope. Once the saw is on they should keep an eye out for the saw getting stuck and be ready for that.
Once cutting has started they should look up every time the saw is reving at all. A good grounds person should already know where the brush and wood is going for now at least until they are freed up from lowering. The grounds person saw should be handy. Once the roping starts the ground person should know if the butt should go out or the top in, when trying to get a limb flat in tight quaters.
They need to know about the way a branch will react and which wires are what as far as obstical wires. And the strengths of them to a point, so they can get a limb down and the rope off quick and know if they can pull that branch down hard or not. They need to know how to flip a rope back to the climber and how to get it untied fast. They have to keep thier lowering ropes staight and tangle free and not around the life line. They need to be able to stop traffic, coil a rope, chip brush talk to the customer, propper raking of the lawn taking out divits with a pitch fork. Drive with out steering to much(if on the grass) as not to rip it up. Easy throttle to avoid spinning. Deacent driving skills. Start chipper. I been doing it so long i don't have to think about any of it so its hard to think of every thing I just do it!!