Operating across the United States via its subsidiaries, Infrastructure and Energy Alternatives, Inc. (IEA) is a diversified infrastructure construction entity. The company provides comprehensive engineering, procurement, and construction (EPC) services for the renewable energy, traditional power, and civil infrastructure industries. Its activities are segmented into Renewables and Specialty Civil. The Renewables division delivers a full suite of services, including complete EPC project delivery, design, site development, construction, installation, and maintenance for wind and solar energy facilities. The Specialty Civil segment, meanwhile, offers a broad array of services: environmental remediation (covering site preparation, closure, and outsourced coal ash management/mining), rail infrastructure (encompassing planning, design, procurement, construction, and upkeep of railway and intermodal facilities), and heavy civil construction (involving road and bridge building, specialized paving, industrial maintenance, and projects for local, state, and federal government clients). Founded in 1947, IEA is headquartered in Indianapolis, Indiana. As of October 7, 2022, it operates as a subsidiary of MasTec, Inc.