Performs journey-level welding, machining, and fabrication of metals and special alloys. Duties include maintaining, repairing, designing, and modifying vehicles and construction-related equipment; constructing specialized devices, parts, and structures. Uses plans and blueprints to determine project design, fabricates and modifies parts and equipment, selects welding methods, and determines materials needed. Repairs heavy equipment and fabricates repair parts using various tools and machines. Maintains records, inventories supplies, may instruct or supervise others, and performs other related duties as assigned.