Boilermaker III builds, repairs, tests, and maintains all types of boilers and high pressure vessels. Tests for structural soundness and inspects fittings, feed pumps, safety and check valves, water and pressure gauges, and controls to ensure boilers operate safely and efficiently. Being a Boilermaker III reads and uses blueprints to determine locations, positions, or dimensions of parts. Requires a high school diploma or its equivalent. Additionally, Boilermaker III typically reports to a supervisor or manager. Requires completion of an apprenticeship program. The Boilermaker III has gained full proficiency in a broad range of activities related to the job. Independently performs a wide range of complex duties under general guidance from supervisors. To be a Boilermaker III typically requires 5-7 years of related experience.