Do you need formal training to become a welder?
Formal training of any kind isn’t always necessary. I know, I was surprised when I found out too, but it turns out that only a handful of states and regions even require welders to have licenses. Professionals like plumbers and HVAC technicians often have to take part in a minimum number of classes and work as apprentices in order to earn their licenses. But in most US states, welders don’t have to go through any of that.
When a license isn’t required, you can — in theory — work as a welder in any workshop that will hire you. Though of course, you’ll have a hard time finding employment with no training or experience, so beginner welders often take part in training programs and apprenticeships.
If you happen to have a lot of practical welding knowledge because your father was a welder or something like, you can work in the profession without a license or a certification. Assuming you live in a state that allows you, and you find an employer willing to hire you. WeldingNearYou.com has some interesting articles if you want to learn more about becoming a welder.