A Multi-Welder/TIG & ARC job description involves reading blueprints, operating TIG (Tungsten Inert Gas) and Arc (Shielded Metal Arc Welding) equipment to join and repair metal parts, and preparing materials by cleaning and cutting. The role requires strong attention to detail, the ability to perform welds in various positions, maintain equipment, and adhere to strict safety protocols to ensure the quality and integrity of finished welds.