Seriously? I doubt that you need any license at all. Just balls of steel (and trousers of asbestos!)
Fuel burn is only 20 secs or so. So it would be great for getting to work as long as a) you work really close to home and b) there is a very big wall, or deep ravine, between home and work.
Many years back there was a American guy demonstrating a jet pack down the grandstand straight at Brands Hatch - I think it was a British Grand Prix (I said it was years back)
He was being interviewed by your standard idiot TV presenter who asked
"What if something goes wrong, do you have a parachute or anything to get you down"
to which the answer was "No sir, I rely on gravity to do that!"