Seattle Union Construction Jobs

Hello,
I am wondering if there any work in Seattle for union carpenters, or any union tradesmen, etc? I'm a female who is fully vested journeyman carpenter of 10 years and thinking about going back into the trade after closing my business of 8 years due to the economy. I'm also thinking about going through another apprenticeship to become an electrician, elevator constructor or sprinkler fitter. Is there any work out there for any of those trades?
Thanks for your kind response and any information any of you may have on the Seattle construction market.