A MIG + ARC 3G Welder Job Description involves performing skilled welding using both MIG (Gas Metal Arc Welding) and ARC (Stick) processes, often on structural steel and metal fabrication projects, with an emphasis on 3G (vertical) and 4G (overhead) welding positions. Key responsibilities include interpreting blueprints, preparing metal surfaces, operating and maintaining welding equipment, inspecting welds for quality, and adhering to all safety protocols.