How about a foundry? I work at Doncasters in Groton, CT, we're currently hiring welders. We support the aerospace industry and make castings for Pratt, GE, and Rolls Royce, and currently developing parts for SpaceX as well. I've worked at another aerospace foundry in Connecticut as well, feel free to DM me if you've got any questions.

We pour nickel and cobalt based alloys, 718 mostly. If you've got the welding experience but want exposure to aerospace specs and practices, this is a great place to start.