Millwrights install, maintain, diagnose, and repair equipment such as compressors, pumps, conveyors, gas and steam turbines, monorails, and extruders. They can be found performing mission-critical work at coal, gas, nuclear, and alternative-energy power plants. Their skills are also vital in industries as diverse as automotive, aerospace, food processing, and pharmaceuticals. Precision is a critical skill for millwrights, who sometimes work with specifications requiring tolerances to a thousandth of an inch.
Pile drivers work with pile-driving rigs that drive metal, concrete, or wood piling into the earth during the early stages of construction. They are usually the first workers at a commercial job site. They drive metal sheet piling to hold back dirt during excavations, drive concrete, metal, and wood pilings as part of the foundation system for skyscrapers and drive wood and concrete pilings to hold up docks, wharves, and bridges. Some may work on offshore oil rigs as commercial divers involved in underwater construction. Pile drivers work with a variety of hand and portable power tools, and frequently cut, join, and fasten metal construction materials using welding equipment and oxy-acetylene torches.