Nucor is a major steel and steel-products manufacturer, producing sheet, plate, bar, structural steel, and downstream products used across construction, infrastructure, and industrial supply chains. Nucor also operates raw materials businesses that support steelmaking, including scrap-related operations. Nucor runs a decentralized operating model across many divisions and plants. The company is publicly listed in the United States.

Nucor is headquartered in Charlotte, North Carolina and operates a wide footprint of plants and divisions across the United States, plus some international presence shown on the company locations directory. Many early-career roles are plant- or site-based due to the nature of steel manufacturing, with corporate roles more likely to be office-based.