https://www.stlcc.edu/programs-academics/accelerated-job-training/boeing-pre-employment-training.aspx

The simple way to find out is by checking the job requisitions at Boeing.com, then send a resume'.  I'll get a head hunting fee if you let me submit you as a candidate; that's a good measure of the current demand.

You'll need to figure out where you want to work, you won't find a job across all four of those specialties.

62 requisitions in Missouri.  Several in my department, several in aero, at least one in materials.  I saw one that should be filled internally, it will require T-45 experience for success:

https://jobs.boeing.com/category/engineering-jobs/185/11125/1

There are a similar number of jobs in Oklahoma, and 24 in Alabama.  The Alabama jobs will mostly be man rated space craft.

The classes are for composite fabricator and sheet metal assemblers.  I posted this in case someone here needs a job and is ambitious enough to put in some effort to get a job.