Sterling Infrastructure Inc operates through subsidiaries within three segments: E-Infrastructure, Transportation, and Building Solutions in the United States, mainly across the Southern, Northeastern, Mid-Atlantic, and Rocky Mountain regions and the Pacific Islands. E-Infrastructure Solutions generates maximum revenue and provides site development and mission-critical electrical services for data centers, manufacturing, distribution centers, warehousing, and power generation. Transportation Solutions includes infrastructure and rehabilitation projects for highways, airports, ports, rail, and storm drainage systems. Building Solutions includes residential and commercial concrete foundations, parking structures, plumbing services, and surveys for new single-family residential builds.