Top 21 Transportation Engineering Companies in California

California's transportation engineering sector is pivotal in shaping the state's infrastructure. Companies in this industry focus on planning, designing, and implementing transportation systems that facilitate movement across urban and rural areas. They transform ideas into roadways, railways, bridges, and transit systems, addressing challenges like traffic congestion and environmental sustainability. Recent pushes towards innovative technology, such as smart transportation systems, showcase an industry evolving to meet tomorrow's demands. Environmental considerations are now a priority, driving companies to adopt sustainable practices as the industry strives to build connectivity and resilience against climate challenges.

The listed transportation engineering companies reflect a broad range of sizes, from small teams to large firms, with headquarters spanning the state in cities like Long Beach, Walnut Creek, and Sacramento. Founded between 1945 and 2018, these companies focus on various specializations, including traffic safety, infrastructure design, and transportation planning. Many of them significantly influence local government projects while also adapting to emerging trends in mobility and sustainability, illustrating their integral role in the state's infrastructure development.

Continue reading to discover California's top transportation engineering companies.

Top 21 Transportation Engineering Companies in California

1. Moffatt & Nichol

• Website: moffattnichol.com
• Ownership type: Private
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 79%, United Kingdom (UK) 6%, Brazil 4%, Other 11%
• Founded year: 1945
• Headcount: 1001-5000
• LinkedIn: moffatt-%26-nichol

Moffatt & Nichol, founded in 1945 and based in Long Beach, California, is a private consulting and engineering firm with a workforce of approximately 1,179 employees. The company specializes in providing professional services across several sectors, including transportation, ports, water management, and environmental resilience. Their transportation services focus on planning, design, and technology solutions aimed at enhancing goods movement and connectivity. Moffatt & Nichol serves a wide range of clients, including government agencies and private organizations, and has been involved in significant projects such as the I-405 Improvement Project in California and the Savannah International Multi-Modal Connector in Georgia. Their commitment to innovation and excellence has been recognized by industry awards, further solidifying their position in the transportation engineering sector.

2. Fehr & Peers

• Website: fehrandpeers.com
• Ownership type: Private
• Headquarters: Walnut Creek, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1985
• Headcount: 201-500
• LinkedIn: fehr-%26-peers

Fehr & Peers is a transportation consulting firm based in Walnut Creek, California, with a workforce of approximately 422 employees. Since its inception in 1985, the company has focused on providing innovative solutions to improve community transportation systems. They serve a wide range of clients, including government agencies and private organizations, by offering expertise in areas such as active transportation, climate resilience, and data-driven analysis. Fehr & Peers prides itself on its collaborative approach, actively listening to client and community needs to tailor solutions effectively. The firm invests in self-funded research and development to stay ahead of emerging trends and challenges in transportation, ensuring that they provide well-informed, implementable solutions. Their commitment to equity in transportation and safety further underscores their role in shaping sustainable and resilient transportation systems.

3. TJKM Transportation Consultants

• Website: tjkm.com
• Ownership type: Private
• Headquarters: Pleasanton, California, United States (USA)
• Employee distribution: United States (USA) 96%, India 4%
• Founded year: 1974
• Headcount: 11-50
• LinkedIn: tjkm

TJKM Transportation Consultants, based in Pleasanton, California, is a private firm specializing in transportation planning and engineering services. Established in 1974, TJKM has built a strong reputation over the years, completing over 8,000 projects primarily in California and Nevada. The firm offers a comprehensive range of services, including traffic operations, freeway and corridor studies, traffic engineering design, and intelligent transportation systems. TJKM is dedicated to improving transportation systems and safety, focusing on multimodal solutions that enhance access for all users, including motorists, cyclists, and pedestrians. Their client base includes municipalities, transportation agencies, and private developers, reflecting their ability to cater to both public and private sector needs. TJKM is also recognized as a Certified Disadvantaged Business Enterprise (DBE) and a Small Business Enterprise (SBE) in California, further highlighting their commitment to inclusivity and community engagement.

4. GNA (a TRC Company)

• Website: trccompanies.com
• Ownership type: Private Equity
• Headquarters: Santa Monica, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $554.6M, March 2017
• Founded year: 1961
• Headcount: 51-200
• LinkedIn: gladstein-neandross-%26-associates

GNA (a TRC Company) operates as a consulting, engineering, and construction management firm based in Santa Monica, California. Founded in 1961, the company has built a reputation for providing a wide array of services across multiple sectors, including transportation, power, and environmental services. GNA specializes in transportation engineering, focusing on traffic studies, road and bridge design, and clean transportation consulting. They cater to a variety of clients, including public, private, and government entities, assisting with infrastructure development and project management. The firm is part of TRC Companies, Inc., which has a significant presence in the industry and has received substantial funding, indicating its ongoing relevance and capability in the market.

5. Wood Rodgers, Inc.

• Website: woodrodgers.com
• Ownership type: Private
• Headquarters: Sacramento, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 201-500
• LinkedIn: woodrodgersinc

Wood Rodgers, Inc. is an engineering firm based in Sacramento, California, founded in 1997. With a workforce of approximately 338 employees, the company provides a comprehensive suite of services that includes transportation engineering, environmental consulting, geotechnical engineering, and more. Their transportation engineering services cover critical areas such as freeway and highway design, roadway design, traffic modeling, and bridge design. The firm serves both private and public sector clients, emphasizing innovative solutions and strong client relationships. Wood Rodgers has been involved in significant projects, including the City of West Sacramento Riverfront Street Extension Project, showcasing their expertise in transportation infrastructure. They operate across several locations in California and Nevada, reinforcing their presence in the regional engineering market.

6. Linscott, Law & Greenspan, Engineers

• Website: llgengineers.com
• Ownership type: Private
• Headquarters: Irvine, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1966
• Headcount: 51-200
• LinkedIn: linscott-law-%26-greenspan-engineers

Linscott, Law & Greenspan, Engineers (LLG) is an engineering firm based in Irvine, California, specializing in transportation planning and engineering services. Established in 1966, LLG has built a reputation for providing comprehensive solutions that address the complexities of modern transportation systems. Their service offerings include traffic safety assessments, travel demand modeling, traffic impact studies, and environmental impact reports. LLG works closely with government agencies and private developers, helping them enhance transportation systems while ensuring compliance with regulatory standards. The firm is also involved in innovative projects that focus on sustainable transportation strategies, pedestrian and bicycle mobility, and intelligent transportation systems. With a dedicated team of professionals, LLG emphasizes safety and efficiency in their planning and engineering solutions, contributing significantly to the advancement of transportation infrastructure in California and beyond.

7. CHS Consulting Group

• Website: chsconsulting.net
• Ownership type: Private
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1998
• Headcount: 11-50
• LinkedIn: chs-consulting-group

CHS Consulting Group, based in San Francisco, California, is a private consulting firm founded in 1998. With a team of 22 professionals, the company specializes in transportation planning and engineering services tailored for dense urban environments. Their offerings include traffic operations, transit planning, traffic signal design, and innovative parking management. Over the years, CHS has managed significant transportation planning and design tasks, contributing to both domestic and international projects in countries like China, South Korea, Malaysia, and Mexico. The firm prides itself on its collaborative approach, working closely with architects, urban designers, and government agencies to deliver effective transportation solutions. Their commitment to quality and responsiveness is reflected in their long-standing relationships with repeat clients, showcasing their reliability in the field.

8. NCM Engineering Corp - A Gannett Fleming TranSystems Company

• Website: ncmcivil.com
• Ownership type: Corporate
• Headquarters: Irvine, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: April 2024
• Founded year: 2012
• Headcount: 11-50
• LinkedIn: ncm-engineering-corp-

NCM Engineering Corp, a California Small Business Enterprise (SBE), specializes in transportation infrastructure projects. Founded in 2012, the company has quickly established itself as a key player in the engineering sector, focusing on the planning, design, and management of highways, bridges, and roadways. With a team of recognized industry professionals, NCM has successfully delivered numerous large-scale projects across California, with a construction value exceeding $2 billion. Their client base includes various government agencies and private developers, reflecting their ability to meet diverse project needs. In April 2024, NCM joined TranSystems, a national transportation consulting firm, which further strengthens their capabilities and market presence. This partnership allows NCM to leverage additional resources and expertise, enhancing their service offerings in transportation planning and infrastructure improvement. NCM is committed to quality, integrity, and client satisfaction, striving to provide innovative solutions to complex project challenges.

9. Overland, Pacific, & Cutler, LLC, (OPC)

• Website: opcservices.com
• Ownership type: Private Equity
• Headquarters: Long Beach, California, United States (USA)
• Latest funding: September 2017
• Founded year: 1980
• Headcount: 51-200
• LinkedIn: overland-pacific-%26-cutler

Overland, Pacific, & Cutler, LLC (OPC) is an engineering consulting firm based in Long Beach, California, founded in 1980. The company provides a wide array of services that cater to the transportation sector, including traffic engineering, highway design, and environmental consulting. OPC has built a reputation for delivering tailored solutions that meet the specific needs of its clients, which include government agencies and private firms. Their expertise extends to various infrastructure projects, showcasing their commitment to enhancing transportation systems. With a workforce of approximately 103 employees, OPC is well-equipped to handle projects of varying scales and complexities, contributing significantly to the development and improvement of transportation infrastructure across the United States.

10. KOA Corporation

• Website: koacorporation.com
• Ownership type: Corporate
• Headquarters: Monterey Park, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2022
• Founded year: 1987
• Headcount: 51-200
• LinkedIn: koa-corporation

KOA Corporation, established in 1987 and based in Monterey Park, California, is an engineering firm that specializes in transportation engineering, mobility planning, and construction management. The company serves both public agencies and private sector clients, focusing on improving transportation systems and ensuring safety for all users. KOA's service offerings include grant writing, safety implementation, and intelligent transportation systems, showcasing their commitment to enhancing transportation infrastructure. With a team of registered civil and traffic engineers, certified transportation planners, and construction specialists, KOA has built a reputation for delivering innovative solutions tailored to the needs of their clients. The firm operates five offices in Southern California and has been involved in significant public works and planning projects across various modes of transportation. In December 2022, KOA became part of Lochner, a national firm that provides a broader range of planning and engineering services, further strengthening KOA's position in the industry.

11. Dokken Engineering

• Website: dokkenengineering.com
• Ownership type: Private
• Headquarters: Folsom, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1986
• Headcount: 51-200
• LinkedIn: dokken-engineering

Dokken Engineering, founded in 1986 and based in Folsom, California, is a civil engineering firm that specializes in transportation and infrastructure projects. With a workforce of approximately 148 employees, the company has successfully completed over 3,000 infrastructure projects, including more than 2,000 bridges and 150 miles of Class I bike trails. Their services span various aspects of transportation engineering, including active transportation, environmental services, public outreach, and right-of-way acquisition. Dokken Engineering has worked extensively with public agencies, guiding projects from conception through construction while ensuring compliance with environmental regulations. Their notable achievements include being recognized as a Bicycle Friendly Business and receiving accolades such as the 2021 Business of the Year by the Folsom Chamber of Commerce. The firm has also been listed among the Top 500 Design Firms by Engineering News-Record Magazine multiple times. This extensive experience and recognition in the field underscore their significant role in the transportation engineering industry.

12. W-Trans

• Website: w-trans.com
• Ownership type: Private
• Headquarters: Santa Rosa, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1995
• Headcount: 11-50
• LinkedIn: w-trans

W-Trans, based in Santa Rosa, California, is a private traffic engineering consultancy founded in 1995. With a team of 22 employees, the firm specializes in transportation planning and design services aimed at improving traffic safety and mobility for communities. Their expertise includes complete streets design, pedestrian safety enhancements, and traffic calming measures. W-Trans has worked on numerous projects that address the needs of municipalities and public agencies, demonstrating a strong commitment to sustainable transportation solutions. Their portfolio includes traffic impact analyses, safety evaluations, and the design of various transportation facilities, showcasing their comprehensive approach to traffic engineering. As a certified Disadvantaged Business Enterprise (DBE) in California, W-Trans also emphasizes inclusivity in their operations and project engagements.

13. Ramos Consulting Services, Inc. (Ramos CS)

• Website: ramoscs.com
• Ownership type: Private
• Headquarters: Pasadena, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 51-200
• LinkedIn: ramos-cs

Ramos Consulting Services, Inc. (Ramos CS) is an engineering and construction management firm based in Pasadena, California. Established in 2008, the company specializes in transit and transportation projects, providing a range of services that include comprehensive engineering, program management, and construction management. With a team of licensed professionals, Ramos CS focuses on delivering quality solutions for public agencies and municipalities. Their portfolio includes significant projects such as the California High-Speed Rail and the Westside Subway Extension, highlighting their active role in advancing infrastructure development. The firm is dedicated to enhancing mobility and ensuring successful project execution from concept to completion, making them a notable entity in the transportation engineering sector.

14. D'Leon Consulting Engineers

• Website: dleonengineers.com
• Ownership type: Private
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1987
• Headcount: 11-50
• LinkedIn: d%27leon-consulting-engineers-corp

D'Leon Consulting Engineers (DLCE) is a civil engineering consulting firm based in Long Beach, California, specializing in infrastructure projects. Founded in 1987, the company has built a reputation for delivering high-quality engineering, project management, and construction management services. DLCE primarily serves civic agencies and organizations involved in transportation and public infrastructure development. The firm has played a pivotal role in various significant projects, including the modernization of LAX, the East San Fernando Valley Light Rail Transit Project, and the Inglewood Transit Connector. Their expertise extends across multiple sectors, including aviation, rail, and highway design, showcasing their capability to handle complex engineering challenges. DLCE is also recognized as a certified Small Business Enterprise and Minority-Owned Business Enterprise, reflecting their commitment to diversity and community engagement.

15. ProVen Management, Inc.

• Website: provenmanagement.com
• Ownership type: Private
• Headquarters: Oakland, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1991
• Headcount: 51-200
• LinkedIn: proven-management

ProVen Management, Inc., based in Oakland, California, is a private construction and engineering firm that has been operational since 1991. The company specializes in infrastructure projects, with a strong focus on transportation, water resources, power, environmental restoration, and seismic retrofitting. ProVen has built a solid reputation through its extensive involvement in transportation engineering, having completed notable projects such as the seismic retrofitting of the San Francisco International Airport viaduct and the reconstruction of major freeway overpasses for Caltrans. Their client base includes various federal, state, and local government agencies, which rely on ProVen for reliable infrastructure solutions. The firm has demonstrated its expertise in managing complex projects that require a high level of technical skill and coordination, particularly in the transportation sector.

16. Ak

• Website: akcengineers.com
• Ownership type: Private
• Headquarters: Escondido, California, United States (USA)
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: ak

AK Consulting Engineers, Inc., founded in 2004 and based in Escondido, California, is a private engineering consulting firm that focuses on civil engineering services. The company has built a reputation for its expertise in transportation engineering, land development, drainage, and water/wastewater treatment. With a workforce of approximately 1396 employees, AK has completed over 309 projects, showcasing their capability in handling significant engineering challenges. Their client base includes both private developers and public agencies, reflecting their versatility in addressing various infrastructure needs. AK's services span from project management to construction support, ensuring comprehensive solutions for their clients. The firm has also received 26 awards, highlighting their commitment to quality and excellence in engineering.

17. VST Engineering Inc.

• Website: vst.engineering
• Ownership type: Private
• Headquarters: Oakland, California, United States (USA)
• Employee distribution: United States (USA) 94%, South Africa 6%
• Founded year: 2018
• Headcount: 11-50
• LinkedIn: vst-engineering

VST Engineering Inc. is a private engineering firm based in Oakland, California, specializing in transportation and civil engineering services. Established in 2018, the company has quickly made a name for itself by providing a range of services that include rail and roadway design, project management, and construction oversight. VST Engineering has been involved in high-profile projects such as the California High-Speed Rail and the Bay Area Rapid Transit system, showcasing their expertise in managing complex infrastructure initiatives. Their client base primarily consists of transportation authorities and agencies, reflecting their focus on delivering expert engineering solutions for critical infrastructure projects. With a team of skilled professionals, VST Engineering emphasizes quality, accountability, and user-centric solutions in their work, contributing to the advancement of transportation systems in California and beyond.

18. Hexagon Transportation Consultants, Inc.

• Website: hextrans.com
• Ownership type: Private
• Headquarters: San Jose, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1998
• Headcount: 11-50
• LinkedIn: hexagon-transportation-consultants-inc

Hexagon Transportation Consultants, Inc. is a transportation consulting firm based in San Jose, California, with additional offices in Gilroy and Pleasanton. Established in 1998, the company specializes in traffic engineering and transportation planning services, catering to both private and public entities throughout the San Francisco Bay Area. Their service offerings include feasibility studies, traffic control plans, traffic simulation studies, and neighborhood traffic studies, among others. Hexagon prides itself on delivering high-quality work that is double-checked and presented clearly. The firm emphasizes accessibility and responsiveness, ensuring that clients receive timely and effective consulting services. With a team of experienced professionals proficient in state-of-the-art software, Hexagon is well-equipped to handle a variety of transportation-related projects, contributing to the improvement of traffic systems and urban planning in the region.

19. CR Associates

• Website: cramobility.com
• Ownership type: Private
• Headquarters: San Diego, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2011
• Headcount: 11-50
• LinkedIn: chen-ryan-associates-inc

CR Associates, founded in 2011 and based in San Diego, California, is a woman-owned transportation planning and engineering consultancy. The firm specializes in providing high-quality services to local agencies and communities, focusing on civil and traffic engineering, transportation planning, and active transportation solutions. With a team of approximately 45 employees, CR Associates is dedicated to creating and supporting vibrant, sustainable communities through innovative transportation systems. Their expertise spans various areas, including traffic operations, collision analysis, and grant writing, which positions them as a valuable partner for public agencies seeking to enhance mobility and safety. The firm has successfully assisted communities in securing significant funding for transportation projects, demonstrating their capability and commitment to the industry.

20. RSE Corp

• Website: rsecorp.com
• Ownership type: Private
• Headquarters: Belmont, California, United States (USA)
• Employee distribution: United States (USA) 96%, Brazil 4%
• Founded year: 1998
• Headcount: 51-200
• LinkedIn: rse-inc.

RSE Corporation, founded in 1998 and based in Belmont, California, is a private engineering firm that specializes in civil engineering and transportation infrastructure. With a workforce of approximately 55 employees, RSE provides a range of services including subsurface utility engineering, construction management, and railway systems engineering. The company has built a strong portfolio by working with various rail transit agencies and local government entities, delivering expert engineering solutions aimed at enhancing transportation systems. Notable clients include LA Metro, Metrolink, and Caltrain, among others. RSE has been involved in significant projects such as the Caltrain Electrification Project, which aims to improve system performance and reduce environmental impacts, and the BART Program Management Support, focusing on asset management for the Bay Area Rapid Transit system. RSE's commitment to quality and client partnership is evident in their approach to project management and execution, ensuring timely and effective delivery of services.

21. WMH Corporation

• Website: wmhcorporation.com
• Ownership type: Private
• Headquarters: San Jose, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 11-50
• LinkedIn: wmh-corporation

WMH Corporation, based in San Jose, California, is a civil engineering firm founded in 2008. With a team of approximately 40 employees, the company specializes in project management and design services tailored for transportation infrastructure projects. WMH serves a variety of clients, including state and local agencies, as well as private sector entities. Their expertise covers all phases of project development, ensuring high-quality delivery and compliance with regulatory standards. WMH has successfully completed numerous projects, including highway alignments, interchanges, and transit facilities, demonstrating their capability in handling complex transportation challenges. Their commitment to innovative solutions and a client-first approach has resulted in a strong record of repeat business, highlighting their effectiveness in the transportation engineering sector.

Transportation Engineering Insights: Key Companies in California

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