Caterpillar Peoria welding operation (5,000 welders)

Cited as the largest welding facility in the United States (~5,000 welders), illustrating the scale at which welder certification operates.

And the certification is — you're going to have more than one person do all the welding. It's not just the person who did this qualification test, you're going to have hundreds of people. Anybody know what the largest welding facility in the United States is, has more welders than anyone else? It's not a shipyard. Caterpillar, Peoria, Illinois. They've got about five thousand welders in Peoria. They weld big heavy steel pieces. The welder has to be certified, and they have to show they have the skill.