I was a part-time welding inspector. We had a lot riding on the skill of our welders.
Many of them are still at work. The Habs need a lot of refinement.
Some of the welding is done "outside". It's funny to see. First a full-size spiderbot goes out, gives birth to a minibot carrying the electric welding equipment, and then watches motheringly as the welding takes place.
It's all done by teleoperators, of course. But it beats having to suit up and try welding in space, while hanging under the hull of a rotating habitat.