As a shipyard welder, your job is to help build and repair ships. In this role, you may replace or repair metal parts of a ship’s structure. You weld various types of metal, following blueprints and ensuring that the structure can withstand the pressure of the ocean. A shipyard welder can work on a ship of any size, ranging from small yachts to aircraft carriers or cruise ships, but many specialize in a specific type of vessel. You may work in elevated areas as well as tight or cramped regions. Some welders also work underwater, which may require additional training and certification.