# 47 leading Civil Engineering companies in California

Tamtam tracks 47 Civil Engineering companies headquartered in California. This list ranks all of them by number of employees on LinkedIn, led by Tetra Tech, URS Corporation, An AECOM Company and American Hair Force. Their median headcount is 332. Half of them were founded in 1971 or later. The most common headquarters are San Francisco (6), Los Angeles (5) and San Diego (4).

These civil engineering companies in California include large, established firms and mid-sized companies. They specialize in a range of infrastructure projects, from water and environmental solutions to transportation and urban development. Tetra Tech provides global consulting and engineering services for water, environment, and infrastructure. URS Corporation, an AECOM Company, offers design, construction, and operations for infrastructure assets. Moffatt & Nichol is a global infrastructure advisor specializing in coastlines and harbors, while Psomas focuses on sustainable projects in transportation and land development. Many firms offer a broad spectrum of services including planning, design, construction management, and surveying.There is a notable concentration of these civil engineering firms in major Californian cities. San Francisco, Los Angeles, and San Diego each host multiple headquarters, indicating significant hubs for engineering expertise and project management within the state. Several companies, such as BKF Engineers, Kennedy Jenks, and Mark Thomas, have been established for over a century, demonstrating a long-standing presence and deep experience in the sector.

🇺🇸 California · 47 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Tetra Tech](https://www.tamtam.ai/c/tetra-tech) (tetratech.com)<br>A global provider of consulting and engineering services, specializing in innovative technical solutions for water, environment, infrastructure, energy, and international development projects | Civil Engineering | 🇺🇸 Pasadena | 27,460 |  |
| 2 | [URS Corporation, An AECOM Company](https://www.tamtam.ai/c/urs-corporation-an-aecom-company) (urs.com)<br>A global professional and technical services firm offering design, construction, and operations of infrastructure assets worldwide for public and private clients | Civil Engineering | 🇺🇸 San Francisco | 8,221 |  |
| 3 | [American Hair Force](https://www.tamtam.ai/c/american-hair-force)<br>Civil engineering company located in Folsom, California, specializing in various civil engineering services in the United States | Civil Engineering | 🇺🇸 Folsom | 7,277 |  |
| 4 | [TYLin](https://www.tamtam.ai/c/tylin) (tylin.com)<br>Design infrastructure solutions enhancing mobility, sustainability, resilience, and innovation to connect and elevate communities worldwide with advanced engineering approaches. | Civil Engineering | 🇺🇸 San Francisco | 3,321 |  |
| 5 | [County of Los Angeles Department of Public Works](https://www.tamtam.ai/c/county-of-los-angeles-department-of-public-works) (pw.lacounty.gov)<br>The organization plans, designs, constructs, and upkeeps modern infrastructure to enhance all communities within LA County | Civil Engineering | 🇺🇸 Alhambra | 3,303 | 1985 |
| 6 | [Kleinfelder](https://www.tamtam.ai/c/kleinfelder) (kleinfelder.com)<br>Engineering, science, and construction firm offering solutions for transportation, water, energy, and private infrastructure projects with a dedicated, cross-disciplinary team | Civil Engineering | 🇺🇸 San Diego | 2,656 |  |
| 7 | [Moffatt & Nichol](https://www.tamtam.ai/c/moffatt-and-nichol) (moffattnichol.com)<br>Global infrastructure advisor specializing in planning and designing coastlines, harbors, rivers, transportation, and energy facilities with a focus on excellence and customization | Civil Engineering | 🇺🇸 Long Beach | 1,220 | 1945 |
| 8 | [Psomas](https://www.tamtam.ai/c/psomas) (psomas.com)<br>A full-service consulting firm specializing in award-winning projects with a focus on sustainability in Transportation, Water, Facilities, Land Development, Energy, and Federal markets | Civil Engineering | 🇺🇸 Los Angeles | 799 | 1946 |
| 9 | [BKF Engineers](https://www.tamtam.ai/c/bkf-engineers) (bkf.com)<br>A California-based engineering firm offering services in engineering, surveying, and land planning for various industries and projects for over 100 years | Civil Engineering | 🇺🇸 Oakland | 777 | 1915 |
| 10 | [Cadeploy](https://www.tamtam.ai/c/cadeploy) (cadeploy.com)<br>A fast-growing Engineering solutions company offering detailed services in construction, industrial, infrastructure, automotive, and aerospace sectors with a commitment to quality and reliability | Civil Engineering | 🇺🇸 Danville | 685 | 2012 |
| 11 | [Kennedy Jenks](https://www.tamtam.ai/c/kennedy-jenks) (kennedyjenks.com)<br>An employee-owned engineering firm providing innovative water and environmental solutions to government, private, and transportation clients for over a century | Civil Engineering | 🇺🇸 San Francisco | 587 | 1919 |
| 12 | [Mark Thomas](https://www.tamtam.ai/c/mark-thomas) (markthomas.com)<br>Planning, civil and structural engineering, construction management, land surveying, landscape architecture, urban design, and district management for public agencies. | Civil Engineering | 🇺🇸 San Jose | 574 | 1927 |
| 13 | [Cordoba Corporation](https://www.tamtam.ai/c/cordoba-corporation) (cordobacorp.com)<br>A California-based firm specializing in engineering, construction management, program management, and planning for transportation, water, energy, education, and facilities projects statewide | Civil Engineering | 🇺🇸 Los Angeles | 499 | 1983 |
| 14 | [Ninyo & Moore, A SOCOTEC Company](https://www.tamtam.ai/c/ninyo-and-moore-a-socotec-company) (ninyoandmoore.com)<br>Providing geotechnical and environmental engineering, soil and materials testing, and inspection services for governmental, commercial, and private sector clients since 1986 | Civil Engineering | 🇺🇸 San Diego | 477 | 1986 |
| 15 | [RICK](https://www.tamtam.ai/c/rick) (rickengineering.com)<br>Multi-disciplinary planning, design, and engineering firm with over 65 years of experience serving public and private sector clients in various disciplines | Civil Engineering | 🇺🇸 San Diego | 471 | 1955 |
| 16 | [CWE](https://www.tamtam.ai/c/cwe) (cwecorp.com)<br>A dynamic civil engineering firm providing solutions for water resources, environmental projects, stormwater management, and complete project delivery in Western United States | Civil Engineering | 🇺🇸 Fullerton | 459 | 2006 |
| 17 | [Intecsa Group](https://www.tamtam.ai/c/intecsa-group) (intecsa.eu)<br>A Spanish engineering company specializing in transport, ports, logistics, building, water, and environment projects with global presence in multiple countries | Civil Engineering | 🇺🇸 Los Angeles | 453 | 1965 |
| 18 | [Fehr & Peers](https://www.tamtam.ai/c/fehr-and-peers) (fehrandpeers.com)<br>Transportation planning and engineering firm providing innovative, data-driven solutions to improve mobility, safety, and community well-being nationwide. | Civil Engineering | 🇺🇸 Walnut Creek | 438 | 1985 |
| 19 | [MPF](https://www.tamtam.ai/c/mpf) (mpf-tnr.com)<br>Specializing in large capital program delivery, we serve both public and private sectors including transit agencies, design firms, and railroads | Civil Engineering | 🇺🇸 Walnut Creek | 381 | 2022 |
| 20 | [AutoDesk Civil 3D & AutoCAD](https://www.tamtam.ai/c/autodesk-civil-3d-and-autocad) (youtube.com)<br>Specializes in offering courses in Highways Design, Civil 3D, and AutoCAD to enhance skills and knowledge in these areas | Civil Engineering | 🇺🇸 Sunnyvale | 375 |  |
| 21 | [Wood Rodgers, Inc.](https://www.tamtam.ai/c/wood-rodgers-inc) (woodrodgers.com)<br>A forward-thinking and innovative engineering, planning, surveying, and mapping consulting firm challenging the status quo and fostering creativity in California and Nevada | Civil Engineering | 🇺🇸 Sacramento | 367 | 1997 |
| 22 | [Sandis](https://www.tamtam.ai/c/sandis) (sandis.net)<br>A professional services corporation specializing in civil engineering, traffic engineering, land surveying, and planning with expertise in Land Development Design for various sectors | Civil Engineering | 🇺🇸 Campbell | 367 | 1965 |
| 23 | [CHC Consulting, a Congruex Company](https://www.tamtam.ai/c/chc-consulting-a-congruex-company) (congruex.com)<br>An engineering consulting firm specializing in telecommunications and utilities, providing services in engineering, design, project management, process development, improvement, and staffing | Civil Engineering | 🇺🇸 San Clemente | 344 | 2003 |
| 24 | [Degenkolb Engineers](https://www.tamtam.ai/c/degenkolb-engineers) (degenkolb.com)<br>A leading engineering firm founded in 1940, specializing in award-winning structural designs that save clients money and achieve outstanding project results | Civil Engineering | 🇺🇸 San Francisco | 332 | 1940 |
| 25 | [Caltrans District 8](https://www.tamtam.ai/c/caltrans-district-8) (dot.ca.gov)<br>A transportation engineering entity in Riverside and San Bernardino counties, providing safe transportation infrastructure through maintenance and delivery of roads | Civil Engineering | 🇺🇸 San Bernardino | 278 |  |
| 26 | [GEOCON](https://www.tamtam.ai/c/geocon) (geoconinc.com)<br>A California corporation offering geotechnical engineering, environmental consulting, construction inspections, materials testing, environmental remediation contracting, and operating soils and materials testing laboratories | Civil Engineering | 🇺🇸 San Diego | 255 | 1971 |
| 27 | [TSD Engineering, inc.](https://www.tamtam.ai/c/tsd-engineering-inc) (tsdeng.com)<br>A land development firm in Northern and Central California and Nevada offering Civil Engineering and Surveying Services for residential and commercial projects | Civil Engineering | 🇺🇸 Folsom | 229 |  |
| 28 | [RBF Consulting, a Company of Michael Baker International](https://www.tamtam.ai/c/rbf-consulting-a-company-of-michael-baker-international) (rbf.com)<br>A leading civil engineering and design firm providing a wide range of services for public, governmental, and private organizations worldwide | Civil Engineering | 🇺🇸 Irvine | 205 | 1944 |
| 29 | [Certerra RMA Group](https://www.tamtam.ai/c/certerra-rma-group) (rmagroupinc.com)<br>Client-centered geotechnical engineering and materials testing firm with multiple California offices Specializes in services like geotechnical engineering, pavement engineering, and environmental engineering | Civil Engineering | 🇺🇸 Rancho Cucamonga | 184 | 1962 |
| 30 | [City of Santa Fe Springs](https://www.tamtam.ai/c/city-of-santa-fe-springs) (santafesprings.gov)<br>Planned community in Santa Fe Springs with thriving industrial environment, recreational spaces, and a mission to improve quality of life for residents and businesses | Civil Engineering | 🇺🇸 Santa Fe Springs | 183 |  |
| 31 | [Leighton - A Verdantas Company](https://www.tamtam.ai/c/leighton-a-verdantas-company) (verdantas.com)<br>A company providing environmental, geotechnical, materials testing, and inspection services with a team of engineers, geologists, technicians, and inspectors Offering various job opportunities | Civil Engineering | 🇺🇸 Irvine | 182 | 1961 |
| 32 | [Albert A. Webb Associates (WEBB)](https://www.tamtam.ai/c/albert-a-webb-associates-webb) (webbassociates.com)<br>A long-standing firm with expertise in infrastructure systems, planning, and land development, making a major impact throughout the region | Civil Engineering | 🇺🇸 Riverside | 179 | 1945 |
| 33 | [Ghirardelli Associates](https://www.tamtam.ai/c/ghirardelli-associates) (ghirardelliassoc.com)<br>The company provides construction inspection, management, permit oversight, and program management services to clients, solving problems and reducing costs efficiently | Civil Engineering | 🇺🇸 Roseville | 174 | 1999 |
| 34 | [City of Los Angeles Department of Building and Safety](https://www.tamtam.ai/c/city-of-los-angeles-department-of-building-and-safety) (ladbs.org)<br>This company provides a wide range of services in Los Angeles, such as permit issuance, inspections, code enforcement, trade licenses, and customer service | Civil Engineering | 🇺🇸 Los Angeles | 172 | 1781 |
| 35 | [Sunshine Construction](https://www.tamtam.ai/c/sunshine-construction) (sunshine-construction-inc.com)<br>A Civil Engineering company based in California that specializes in construction projects | Civil Engineering | 🇺🇸 Temple City | 171 |  |
| 36 | [Riverside County Flood Control and Water Conservation District](https://www.tamtam.ai/c/riverside-county-flood-control-and-water-conservation-district) (rcflood.org)<br>The company is dedicated to protecting people, property, and watersheds from flood damage, while also conserving and reclaiming water for beneficial use | Civil Engineering | 🇺🇸 Riverside | 165 | 1945 |
| 37 | [TKE Engineering, Inc.](https://www.tamtam.ai/c/tke-engineering-inc) (tkeengineering.com)<br>A premier multi-disciplinary engineering and construction consulting firm in Southern California, dedicated to community needs with focus on quality, efficiency, and value creation | Civil Engineering | 🇺🇸 Riverside | 164 | 2000 |
| 38 | [Dokken Engineering](https://www.tamtam.ai/c/dokken-engineering) (dokkenengineering.com)<br>With over 30 years of experience, this company provides engineering, environmental, right of way, and construction management services for transportation projects | Civil Engineering | 🇺🇸 Folsom | 161 | 1986 |
| 39 | [McMillen Jacobs Associates](https://www.tamtam.ai/c/mcmillen-jacobs-associates)<br>A reorganization split-off has resulted in the Water Resources Division separating from the Parent Company, allowing each division to focus strategically on their respective clients and work | Civil Engineering | 🇺🇸 San Francisco | 160 | 1954 |
| 40 | [GFDS Engineers](https://www.tamtam.ai/c/gfds-engineers) (gfdseng.com)<br>A structural design firm dedicated to making architects heroes by providing innovative and creative solutions for residential estates and iconic landmarks | Civil Engineering | 🇺🇸 San Francisco | 159 |  |
| 41 | [Wallace Group](https://www.tamtam.ai/c/wallace-group) (wallacegroup.us)<br>A team of professionals specializing in Civil & Transportation Engineering, Construction Management, and more, dedicated to delivering cost-effective design solutions through collaboration | Civil Engineering | 🇺🇸 San Luis Obispo | 156 | 1984 |
| 42 | [MKN](https://www.tamtam.ai/c/mkn) (mknassociates.us)<br>Specializing in water and wastewater solutions, MKN provides innovative and cost-effective strategies to meet clients' water resources goals in California since 2012 | Civil Engineering | 🇺🇸 Arroyo Grande | 150 | 2012 |
| 43 | [SIKAND ENGINEERING](https://www.tamtam.ai/c/sikand-engineering) (sikand.com)<br>A trusted provider of innovative and cost-effective engineering solutions for a wide range of projects in residential, industrial, and commercial developments | Civil Engineering | 🇺🇸 Sherman Oaks | 43 | 1959 |
| 44 | [Shayam](https://www.tamtam.ai/c/shayam) (shayam)<br>Providing innovative solutions and services in the industry, helping clients achieve their goals and drive success | Civil Engineering | 🇺🇸 Santa Clara | 27 | 2004 |
| 45 | [SGE Consulting Engineers](https://www.tamtam.ai/c/sge-consulting-engineers) (sgeconsulting.com)<br>An established engineering firm providing civil and structural services for industrial and commercial projects nationwide, with expertise in rapid project turnaround | Civil Engineering | 🇺🇸 Irvine | 10 | 1992 |
| 46 | [Sky Parsi Engineering & Consulting Corporation](https://www.tamtam.ai/c/sky-parsi-engineering-and-consulting-corporation) (speccorporation.com)<br>An emerging corporation specializing in mechanical, electrical, plumbing, and energy engineering, providing innovative solutions for a diverse range of clients | Civil Engineering | 🇺🇸 Newport Beach | 5 |  |
| 47 | [Laboratory for the Chemistry of Construction Materials (LC2)](https://www.tamtam.ai/c/laboratory-for-the-chemistry-of-construction-materials-lc2) (lcc-ucla.com)<br>The company conducts research to develop sustainable, low-carbon materials for infrastructure construction, focusing on improving concrete performance while promoting environmental responsibility | Civil Engineering | 🇺🇸 Los Angeles | 3 | 2010 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.

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## The same list elsewhere in United States

- [Civil Engineering companies in the United States](https://www.tamtam.ai/l/civil-engineering-companies-united-states) (371)
- [Civil Engineering companies in New York State](https://www.tamtam.ai/l/civil-engineering-companies-new-york-state) (37)
- [Civil Engineering companies in Texas](https://www.tamtam.ai/l/civil-engineering-companies-texas) (26)

## The same list elsewhere

- [Civil Engineering companies in the world](https://www.tamtam.ai/l/civil-engineering-companies-in-the-world) (1,573)
- [Civil Engineering companies in North America](https://www.tamtam.ai/l/civil-engineering-companies-in-north-america) (424)

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Source: https://www.tamtam.ai/l/civil-engineering-companies-california