The trick I think is to keep learning, take more training on your own, more training equals a better chance of keeping your job, more versitility, it is a very competetive world. I mentioned a few specialities above, PLC 's is another good area to be knowlegable in, take supervisory and leadership courses, if its your thing, learn to weld, they are always looking for licensed electricians who can weld, to mount all the brackets for the equipment in the industrial construction projects.
If you hook a boom time being in the union like back in the 80's and some of the later 90's and even right now some regions have it good with some mega projects on the way, an average of 100k per year is very common for approx 42 hrs per week. You dont do that non union!
And Whois...., I never said you couldnt do well working non union. But remember one thing, why does non union make the wages they do? its because the union brothers and sisters striked and fought for better wages and working conditions, a better piece of the pie, dont you want to make top dollar for your work? What the non union owners know is that they have to keep pace to some degree with union wages, or else they will get unionized if their workers start to feel screwed over.