A pipefitter welder is skilled in both pipefitting and welding, so they take on two distinct jobs in their industry. Pipefitting includes installing, assembling, and repairing mechanical piping systems whereas welding involves fabricating, constructing, and producing metal structures and equipment. These professionals often find a career in automotive repair, shipbuilding, manufacturing, or construction. As a pipefitter welder, your job duties may include grinding and fusing metals, threading and joining pipes, and reading blueprints.