Like you say, it's just a game.
As for great jobs, well grave diggers would have to be in high demand, although with all the disease and so forth sweeping through the world, their careers might be short.
Removalists in the early part of the war might also see a boom in demand while building tradesmen would definately be in short supply as fallout shelters, etc were constructed.
Come to think of it, those same tradesmen might have an advantage over everyone else once the bombs did drop - they'd know which backyards had stockpiles of hidden supplies.