I dont know who’s hiring, but these are all the ones i can think of. Most of the bigger ones have yards all the way from Louisiana to Alabama.
The big ones:
Master Boat Builders
Allied Ship Yard
The Chouest Ship Yards- But the only Americans I’ve ever seen are the foremen. The Mexicans would start lining up at the gate at 4am to interview.
Supreme Ship Yards
Rays Ship Yard
Island Ship Yard
Those are all I know off the top of my head.
There are literally hundreds of construction outfits from New Iberia to New Orleans that do this type of stuff.
I had recently read in the last Work Boat that yards were still hiring, but only those that are well qualified. I.E. not just any Mexican that can hold a torch. If you have a lot of experience welding with Aluminum then the better chance of finding work you have.