What is a welder who repairs and modifies existing equipment called?

A welder who repairs and modifies existing equipment is referred to as a maintenance welder. This specialized role focuses on maintaining, repairing, and enhancing machinery, tools, and other equipment that are already in use. Maintenance welders are essential for ensuring that existing structures or equipment continue to function effectively over time, often addressing wear and tear, corrosion, or damage.

In contrast, other welding roles such as production welders are primarily involved in creating new products, structural welders focus on assembling and welding large frameworks, and fabrication welders concentrate on building components from raw materials rather than working on existing assemblies. This distinction emphasizes the unique skill set of maintenance welders in adapting and improving already established systems.