Infrastructure and Energy Alternatives, Inc. (IEA) is a construction company specializing in infrastructure, energy, and heavy civil engineering projects. It offers a variety of delivery models, including full engineering, procurement, and construction services, turnkey, design-build, balance of plant, and subcontracting services. With headquarters in Indianapolis, it operates throughout the United States. IEA is a top-tier contractor for wind energy projects and has completed over 200 renewable energy projects so far. Additionally, IEA provides a number of specialized services including environmental remediation, industrial maintenance, specialty transportation infrastructure, and site development for public and private projects.