A welder is a skilled tradesperson who joins metal parts together using heat and pressure. They work with various materials, including steel, aluminum, and stainless steel, employing techniques like MIG welding, TIG welding, and stick welding. Welders are essential in industries such as construction, manufacturing, and automotive, where strong and durable metal connections are crucial. To become a welder, individuals often complete vocational training or apprenticeships to learn the necessary skills and safety practices. Certification may be required, depending on the job and industry. Welders must also be familiar with tools like welding machines, torches, and protective gear to ensure their safety while working.