A Multi-Welder (TIG & Arc) job involves using both TIG and ARC welding processes to fabricate, repair, and maintain metal structures and equipment, requiring the ability to read blueprints, operate welding equipment, and conduct quality inspections, all while adhering to strict health and safety protocols. Key duties include preparing metal for welding, performing precise TIG welds, maintaining equipment, ensuring safety compliance, and often working as part of a team to meet project deadlines.