> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-in/united-states/civil-engineering/ # Civil engineering firms in the United States Larger civil engineering firms headquartered in the United States: who they are, what they run and how to reach their people. By Enrich.chat Editorial. Updated October 21, 2026. **Short answer:** Larger civil engineering firms headquartered in the United States include AECOM, Tetra Tech, Parsons, URS Corporation, An AECOM and CDM Smith. Below are the tools that stand out, where they are based and how big they are. ## Which civil engineering firms are headquartered in the United States? They include AECOM, Tetra Tech, Parsons, URS Corporation, An AECOM and CDM Smith. The table lists a selection in alphabetical order; names link to company profiles. | Company | Size | Tools detected | | --- | --- | --- | | [AECOM](https://enrich.chat/company/aecom/) | 50,000 to 100,000 | 15 | | Asce | 2,000 to 5,000 | 100 | | Atlas | 2,000 to 5,000 | 9 | | CDM Smith | 5,000 to 10,000 | 24 | | Civil Engineering Discoveries | 5,000 to 10,000 | 21 | | Colliers Engineering & Design | 2,000 to 5,000 | 18 | | Gannett Fleming | 2,000 to 5,000 | 78 | | HNTB | 5,000 to 10,000 | 15 | | Kleinfelder | 2,000 to 5,000 | 16 | | Langan Engineering & Environmental Services | 2,000 to 5,000 | 20 | | Louis Berger | 2,000 to 5,000 | 9 | | Michael Baker International | 2,000 to 5,000 | 7 | | Pape-Dawson Engineers | 2,000 to 5,000 | 45 | | [Parsons](https://enrich.chat/company/parsons/) | 10,000 to 25,000 | 34 | | STV | 2,000 to 5,000 | 12 | | Terracon | 5,000 to 10,000 | 25 | | [Tetra Tech](https://enrich.chat/company/tetra-tech/) | 25,000 to 50,000 | 14 | | TYLin | 2,000 to 5,000 | 5 | | URS Corporation, An AECOM | 5,000 to 10,000 | 3 | | VHB | 2,000 to 5,000 | 13 | ## What technology do civil engineering firms in the United States use? These tools stand out among them: each is detected more often here than across all the organizations listed. The tick on each bar marks that wider average. **Figure: Tools that stand out among civil engineering firms in United States.** Bars for the share of listed civil engineering firms in United States where each tool was detected, with a tick for the share across everything listed: Gravity Forms 30% against 7%, iCIMS 30% against 4%, WP Engine 25% against 7%, Google Cloud Hosting 15% against 4%, Kenexa 10% against 1%, Microsoft SharePoint 10% against 2%. *Share of listed civil engineering firms in the United States where each tool was detected. The tick marks the share across all listed organizations.* ## Where in the United States are they based? The bars show the headquarters city of the listed civil engineering firms. **Figure: Headquarters cities of civil engineering firms in United States.** Bars for the share of listed civil engineering firms in United States headquartered in each city: San Francisco 10%, New York 10%, Dallas 5%, Pasadena 5%, Chantilly 5%, Boston 5%. *Share of listed civil engineering firms in the United States by headquarters city.* ## How big are civil engineering firms in the United States? The columns show how they spread across six size ranges. **Figure: Size of civil engineering firms in United States.** Six columns for the share of listed civil engineering firms in United States in each size range: 2-5K 60%, 5-10K 25%, 10-25K 5%, 25-50K 5%, 50-100K 5%, 100K+ 0%. *Share of listed civil engineering firms in the United States in each size range.* ## More to explore Other industries in the United States: [Hospitals and health care](https://enrich.chat/companies-in/united-states/hospitals-and-health-care/)[Information technology and services](https://enrich.chat/companies-in/united-states/information-technology-and-services/)[Retail](https://enrich.chat/companies-in/united-states/retail/)[Higher education](https://enrich.chat/companies-in/united-states/higher-education/)[Government administration](https://enrich.chat/companies-in/united-states/government-administration/)[Financial services](https://enrich.chat/companies-in/united-states/financial-services/)[Insurance](https://enrich.chat/companies-in/united-states/insurance/)[Restaurants](https://enrich.chat/companies-in/united-states/restaurants/)[Mechanical or industrial engineering](https://enrich.chat/companies-in/united-states/mechanical-or-industrial-engineering/)[Real estate](https://enrich.chat/companies-in/united-states/real-estate/)[All of United States](https://enrich.chat/companies-in/united-states/) Civil engineering elsewhere: [Civil engineering](https://enrich.chat/industries/civil-engineering/) ## How do you reach principals, project directors and heads of business development at civil engineering firms in the United States? Pick an organization from the table, then ask your AI agent for the people in the roles you sell to. ```text Use www.enrich.chat to find principals, project directors and heads of business development at [company] in the United States, with titles and verified work emails ``` ## Frequently asked questions ### Which civil engineering firms are headquartered in the United States? They include AECOM, Tetra Tech, Parsons, URS Corporation, An AECOM and CDM Smith. The page lists a selection with links to their profiles. ### What technology do civil engineering firms in the United States use? Tools that stand out include Gravity Forms, iCIMS, WP Engine and Google Cloud Hosting. ### How big are civil engineering firms in the United States? They range from about 2,000 employees to well over 100,000. The columns on this page show the spread. ### Who do you sell to? Usually principals, project directors and heads of business development. Ask your AI agent to use www.enrich.chat to find them with verified work emails. ## Try this prompt Find principals, project directors and heads of business development ```text Use www.enrich.chat to find principals, project directors and heads of business development at [company] in the United States, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Hospitals and health systems in the United States](https://enrich.chat/companies-in/united-states/hospitals-and-health-care/) - [Software and technology services companies in the United States](https://enrich.chat/companies-in/united-states/information-technology-and-services/) - [Retailers in the United States](https://enrich.chat/companies-in/united-states/retail/) - [Colleges and universities in the United States](https://enrich.chat/companies-in/united-states/higher-education/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)