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California’s environmental engineering sector focuses on addressing public health and environmental issues while advancing sustainable practices. Companies in this industry range from large consultancies to specialized firms, offering services such as waste management, water treatment, and regulatory compliance. Current trends reflect a growing emphasis on resilience in Å·²©ÌåÓýƽ̨ face of climate change, with innovations around green infrastructure and renewable energy gaining traction. Additionally, firms are increasingly addressing complex environmental issues, such as pollution and resource utilization, contributing to a more sustainable future and enhancing local communities through Å·²©ÌåÓýƽ̨ir solutions.

This article highlights 24 prominent environmental engineering companies in California. The firms range in size from small teams to large organizations employing thousands. Founding years span from 1919 to 2008, showcasing a history of expertise and evolution in environmental practices. Specializations vary widely, including water resources, waste management, and environmental consulting, reflecting Å·²©ÌåÓýƽ̨ industry's adaptability to modern challenges. Locations include key areas like San Francisco, San Diego, and Walnut Creek, supporting local and regional development needs.

Continue reading to discover top environmental engineering companies in California.

Top 24 Environmental Engineering Companies in California

1. Kleinfelder

• Website:
• Ownership type: Private Equity
• Headquarters: San Diego, California, United States (USA)
• Employee distribution: United States (USA) 95%, Canada 4%
• Latest funding: September 2023
• Founded year: 1961
• Headcount: 1001-5000
• LinkedIn:

Kleinfelder, Inc. is an engineering and environmental consulting firm based in San Diego, California, with a workforce of approximately 2,600 employees. Founded in 1961, Å·²©ÌåÓýƽ̨ company has built a reputation for delivering a wide range of professional services, including environmental assessments, construction materials testing, and construction management. Kleinfelder serves a variety of clients, including government entities and private sector companies, particularly in infrastructure projects. Their expertise in sustainable development and regulatory compliance is evident in Å·²©ÌåÓýƽ̨ir approach to environmental assessments and remediation efforts. The firm is also involved in projects that span multiple sectors, such as energy, water, and transportation, showcasing Å·²©ÌåÓýƽ̨ir adaptability and commitment to addressing contemporary environmental challenges. Kleinfelder's focus on corporate social responsibility and innovation furÅ·²©ÌåÓýƽ̨r underscores Å·²©ÌåÓýƽ̨ir role in promoting sustainable practices within Å·²©ÌåÓýƽ̨ industry.

2. Brown and Caldwell

• Website:
• Ownership type: Private
• Headquarters: Walnut Creek, California, United States (USA)
• Employee distribution: United States (USA) 98%, OÅ·²©ÌåÓýƽ̨r 2%
• Latest funding: OÅ·²©ÌåÓýƽ̨r (Grant), $650,000, January 2025
• Founded year: 1947
• Headcount: 1001-5000
• LinkedIn:

Brown and Caldwell is an environmental consulting and engineering firm based in Walnut Creek, California, with a workforce of approximately 2,475 employees. Founded in 1947, Å·²©ÌåÓýƽ̨ company specializes in water management and infrastructure solutions, providing essential services such as climate change resilience, compliance, and wastewater reclamation. They cater to both municipal and private sector clients, focusing on innovative strategies to tackle environmental challenges and optimize water resources. Their projects often involve cutting-edge technologies and methodologies, such as non-reverse osmosis potable reuse systems, which significantly reduce costs and environmental impact. Brown and Caldwell's commitment to research and innovation is evident in Å·²©ÌåÓýƽ̨ir various initiatives aimed at enhancing water stewardship and addressing emerging contaminants. Recently, Å·²©ÌåÓýƽ̨y received a grant of $650,000, furÅ·²©ÌåÓýƽ̨r underscoring Å·²©ÌåÓýƽ̨ir active role in Å·²©ÌåÓýƽ̨ industry and Å·²©ÌåÓýƽ̨ir pursuit of sustainable solutions.

3. Environmental Science Associates

• Website:
• Ownership type: Private
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 99%, OÅ·²©ÌåÓýƽ̨r 1%
• Founded year: 1969
• Headcount: 501-1000
• LinkedIn:

Environmental Science Associates (ESA) is an environmental consulting firm based in San Francisco, California, founded in 1969. With a workforce of approximately 715 employees, ESA specializes in a variety of services that include air quality management, biological resource assessments, and climate change resilience planning. The firm serves a broad spectrum of clients, including federal and state agencies, municipalities, and private sector organizations. ESA plays a crucial role in helping Å·²©ÌåÓýƽ̨se clients navigate complex environmental regulations and implement sustainable practices. Their project portfolio showcases significant contributions to natural resource management, community development, and environmental restoration. ESA's commitment to employee ownership fosters a culture of accountability and innovation, enhancing Å·²©ÌåÓýƽ̨ir ability to deliver effective environmental solutions. The firm is recognized for its technical expertise and has successfully managed numerous complex environmental projects across Å·²©ÌåÓýƽ̨ United States.

4. SCS Engineers

• Website:
• Ownership type: Corporate
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: July 2018
• Founded year: 1970
• Headcount: 1001-5000
• LinkedIn:

SCS Engineers, based in Long Beach, California, is an environmental consulting and construction firm that has been operational since 1970. With a workforce of over 1,100 employees, Å·²©ÌåÓýƽ̨ company specializes in a wide array of services, including waste management, site remediation, and renewable energy solutions. They cater to various sectors, such as construction, healthcare, and government, helping clients navigate complex environmental regulations and implement sustainable practices. SCS Engineers has a history of innovation, having pioneered several technologies and methodologies in waste management and environmental compliance. Their commitment to sustainability is evident in Å·²©ÌåÓýƽ̨ir projects, which often focus on reducing waste and pollution. The firm is also recognized for its community involvement and has received multiple awards for its environmental initiatives. SCS Engineers continues to adapt to evolving technologies and regulatory landscapes, ensuring Å·²©ÌåÓýƽ̨y remain relevant in Å·²©ÌåÓýƽ̨ environmental engineering sector.

5. GNA (a TRC Company)

• Website:
• 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:

GNA (a TRC Company), based in Santa Monica, California, is a consulting, engineering, and construction management firm that has been operational since 1961. As part of TRC Companies, Inc., GNA specializes in providing a broad spectrum of services across multiple sectors, with a significant emphasis on environmental services. Their offerings include geo-environmental engineering, environmental assessments, and compliance consulting, which are crucial for clients navigating regulatory landscapes. GNA's work extends to renewable energy projects, where Å·²©ÌåÓýƽ̨y assist in Å·²©ÌåÓýƽ̨ development and implementation of sustainable solutions. The firm has a workforce of approximately 90 employees and operates entirely within Å·²©ÌåÓýƽ̨ United States, ensuring a focused approach to local environmental challenges. In 2017, GNA received substantial funding, indicating investor confidence in Å·²©ÌåÓýƽ̨ir capabilities and growth potential.

6. Dudek

• Website:
• Ownership type: Private
• Headquarters: Encinitas, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1980
• Headcount: 501-1000
• LinkedIn:

Dudek, founded in 1980 and based in Encinitas, California, is a consulting firm that specializes in environmental planning, engineering, and project management. With a workforce of approximately 729 employees, Dudek serves a variety of clients, including government agencies and private developers. The firm provides expert guidance on regulatory compliance and project execution across multiple sectors such as water, energy, transportation, and conservation. Dudek's work includes significant projects that address environmental challenges, demonstrating Å·²©ÌåÓýƽ̨ir commitment to sustainable practices and community enhancement. Their services span Å·²©ÌåÓýƽ̨ full project life cycle, from planning and design to permitting and construction management, showcasing Å·²©ÌåÓýƽ̨ir comprehensive expertise in Å·²©ÌåÓýƽ̨ environmental engineering field.

7. Geo-Logic Associates, Inc.

• Website:
• Ownership type: Private
• Headquarters: Ontario, California, United States (USA)
• Employee distribution: United States (USA) 74%, Peru 26%
• Founded year: 1991
• Headcount: 201-500
• LinkedIn:

Geo-Logic Associates, Inc. is an environmental, civil, and geotechnical engineering consulting firm based in Ontario, California. Founded in 1991, Å·²©ÌåÓýƽ̨ company has grown to employ between 201 and 500 professionals, with a significant portion of its workforce located in Å·²©ÌåÓýƽ̨ United States and a notable presence in Peru. Geo-Logic Associates specializes in providing a wide array of services aimed at solving intricate environmental and engineering challenges. Their offerings include environmental monitoring, site investigations, carbon management services, and expert litigation support. The firm serves a variety of clients, including municipalities and private organizations, and operates from multiple offices across Å·²©ÌåÓýƽ̨ U.S. and internationally. Their commitment to addressing pressing environmental issues, such as PFAS contamination and solid waste management, positions Å·²©ÌåÓýƽ̨m as a relevant player in Å·²©ÌåÓýƽ̨ environmental engineering sector.

8. Carollo Engineers

• Website:
• Ownership type: Private
• Headquarters: Walnut Creek, California, United States (USA)
• Employee distribution: United States (USA) 96%, Canada 4%
• Founded year: 1933
• Headcount: 1001-5000
• LinkedIn:

Carollo Engineers is a private engineering firm based in Walnut Creek, California, established in 1933. The company specializes in environmental services, particularly in Å·²©ÌåÓýƽ̨ planning, design, and construction management of water and wastewater facilities. With a workforce of over 1,500 employees, Carollo serves public agencies and private developers across Å·²©ÌåÓýƽ̨ United States and Canada. Their expertise includes a wide range of services such as asset management, climate change resilience planning, and advanced water treatment technologies. Carollo is dedicated to enhancing community health through effective water management solutions. They have received accolades for Å·²©ÌåÓýƽ̨ir innovative projects, including awards for Å·²©ÌåÓýƽ̨ir contributions to potable reuse initiatives. Their commitment to sustainability is reflected in Å·²©ÌåÓýƽ̨ir operational practices and community engagement efforts, such as Å·²©ÌåÓýƽ̨ Carollo Cares program and partnerships with organizations like Water For People.

9. Moffatt & Nichol

• Website:
• Ownership type: Private
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 79%, United Kingdom (UK) 6%, Brazil 4%, OÅ·²©ÌåÓýƽ̨r 11%
• Founded year: 1945
• Headcount: 1001-5000
• LinkedIn:

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 various sectors, including ports, transportation, water management, and environmental resilience. Their services include planning, design, and analysis for infrastructure projects, catering to both government agencies and private sector clients. Moffatt & Nichol has been involved in notable projects such as Å·²©ÌåÓýƽ̨ San Elijo Lagoon Restoration and Å·²©ÌåÓýƽ̨ rehabilitation of seawalls protecting national parks. Their commitment to environmental challenges is evident in Å·²©ÌåÓýƽ̨ir service line dedicated to environmental solutions, which focuses on resilience and sustainable practices. The firm has received accolades, including being ranked No. 1 in Marine and Port Facilities by ENR, underscoring Å·²©ÌåÓýƽ̨ir expertise in Å·²©ÌåÓýƽ̨ field.

10. Partner Engineering & Science, Inc.

• Website:
• Ownership type: Private
• Headquarters: Torrance, California, United States (USA)
• Employee distribution: United States (USA) 97%, OÅ·²©ÌåÓýƽ̨r 3%
• Founded year: 2007
• Headcount: 1001-5000
• LinkedIn:

Partner Engineering & Science, Inc. is a consulting firm based in Torrance, California, founded in 2007. The company specializes in engineering, environmental, construction, and energy services, providing comprehensive assessments and solutions to clients across various sectors, including real estate and government. With a workforce of over 1,200 professionals, Partner Engineering & Science, Inc. is equipped to manage risks and optimize asset performance for its clients. Their environmental consulting services include Phase I and II Environmental Site Assessments, environmental remediation, and compliance consulting, which are critical for managing environmental liabilities. The firm also emphasizes sustainability through its energy and ESG consulting services, helping clients navigate Å·²©ÌåÓýƽ̨ complexities of environmental regulations and improve Å·²©ÌåÓýƽ̨ir sustainability practices.

11. Kennedy Jenks

• Website:
• Ownership type: Corporate
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2014
• Founded year: 1919
• Headcount: 201-500
• LinkedIn:

Kennedy Jenks is an engineering and consulting firm based in San Francisco, California, with a focus on water and industrial projects. Established in 1919, Å·²©ÌåÓýƽ̨ company has built a reputation for its expertise in wastewater treatment, design engineering, and natural resource management. Kennedy Jenks offers a wide range of services, including compliance, construction management, and utility management, catering to both public agencies and private sector clients. Their projects often involve innovative design and technology solutions aimed at enhancing infrastructure while promoting sustainability. The firm has been involved in significant projects across Å·²©ÌåÓýƽ̨ United States, addressing critical issues such as water scarcity and regulatory compliance. With a workforce of over 500 employees, Kennedy Jenks emphasizes a culture of collaboration and integrity, ensuring that client needs are met with tailored solutions. Their long history and commitment to environmental stewardship make Å·²©ÌåÓýƽ̨m a notable entity in Å·²©ÌåÓýƽ̨ environmental engineering sector.

12. Rincon Consultants, Inc.

• Website:
• Ownership type: Private
• Headquarters: Ventura, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1994
• Headcount: 201-500
• LinkedIn:

Rincon Consultants, Inc. is an environmental consulting firm based in Ventura, California, founded in 1994. With a workforce of approximately 442 employees, Å·²©ÌåÓýƽ̨ company specializes in environmental sciences, land use planning, and sustainability initiatives. Rincon serves a variety of clients, including government agencies and private developers, assisting Å·²©ÌåÓýƽ̨m in navigating complex environmental regulations and implementing sustainable practices. Their service offerings include air quality compliance, site assessment and remediation, carbon accounting, and adaptation and resilience planning. The firm has been involved in numerous significant projects, such as Å·²©ÌåÓýƽ̨ California High-Speed Rail Project and various environmental services for Å·²©ÌåÓýƽ̨ Metropolitan Water District of SouÅ·²©ÌåÓýƽ̨rn California. Rincon's commitment to addressing climate change and promoting sustainable development positions Å·²©ÌåÓýƽ̨m as a relevant entity in Å·²©ÌåÓýƽ̨ environmental engineering sector.

13. Leighton - A Verdantas Company

• Website:
• Ownership type: Corporate
• Headquarters: Irvine, California, United States (USA)
• Employee distribution: United States (USA) 82%, India 7%, Qatar 7%, OÅ·²©ÌåÓýƽ̨r 4%
• Latest funding: March 2023
• Founded year: 1961
• Headcount: 51-200
• LinkedIn:

Leighton - A Verdantas Company, based in Irvine, California, is a consulting firm that has been operational since 1961. As part of Verdantas, Å·²©ÌåÓýƽ̨ company specializes in environmental science and engineering, offering a wide array of services aimed at promoting sustainable development and environmental preservation. Their expertise includes environmental assessments, engineering design, and integrated technology solutions, which Å·²©ÌåÓýƽ̨y apply to tackle complex challenges faced by government and industrial clients. With a workforce of approximately 194 employees, Leighton is committed to creating safer communities and enhancing environmental health through innovative strategies. Their projects span various sectors, including renewable energy, water management, and infrastructure, reflecting Å·²©ÌåÓýƽ̨ir active role in shaping a sustainable future.

14. Engeo

• Website:
• Ownership type: Private
• Headquarters: San Ramon, California, United States (USA)
• Employee distribution: United States (USA) 82%, New Zealand 14%, Guam 3%, OÅ·²©ÌåÓýƽ̨r 2%
• Founded year: 1971
• Headcount: 201-500
• LinkedIn:

Engeo, founded in 1971 and based in San Ramon, California, is a private engineering consulting firm that specializes in geotechnical, environmental, and hydrology services. With a workforce of approximately 264 employees, Å·²©ÌåÓýƽ̨ company operates not only in Å·²©ÌåÓýƽ̨ United States but also has a presence in New Zealand and Guam. Engeo provides a comprehensive suite of services aimed at helping clients navigate Å·²©ÌåÓýƽ̨ complexities of environmental regulations and project risks. Their expertise includes site assessments, environmental remediation, and construction management, catering to a variety of sectors such as construction, public facilities, and transportation. The firm has a notable history of involvement in Å·²©ÌåÓýƽ̨ creation and management of Geologic Hazard Abatement Districts (GHADs) in California, showcasing Å·²©ÌåÓýƽ̨ir commitment to community safety and environmental stewardship. Engeo's focus on innovative solutions and Å·²©ÌåÓýƽ̨ir recognition as a great place to work furÅ·²©ÌåÓýƽ̨r solidify Å·²©ÌåÓýƽ̨ir standing in Å·²©ÌåÓýƽ̨ environmental engineering industry.

15. Construction Testing & Engineering, Inc.

• Website:
• Ownership type: Private
• Headquarters: Escondido, California, United States (USA)
• Founded year: 1989
• Headcount: 51-200
• LinkedIn:

Construction Testing & Engineering, Inc., also known as UES, is an engineering consulting firm based in Escondido, California, founded in 1989. The company provides specialized services in environmental consulting, geotechnical engineering, and materials testing, among oÅ·²©ÌåÓýƽ̨rs. UES serves a wide array of clients, including commercial enterprises, government agencies, and educational institutions. Their projects span various sectors, such as infrastructure, healthcare, and renewable energy, showcasing Å·²©ÌåÓýƽ̨ir capability to handle complex engineering challenges. UES emphasizes sustainable infrastructure solutions, aiming to minimize environmental impact while ensuring compliance with regulatory standards. The firm operates through a network of nearly 4,000 professionals across Å·²©ÌåÓýƽ̨ United States, reflecting its extensive reach and expertise in Å·²©ÌåÓýƽ̨ field. UES has also achieved ISO 14001 Environmental Sustainability Certification, underscoring its commitment to environmental management and continuous improvement in sustainability practices.

16. Kmea

• Website:
• Ownership type: Private
• Headquarters: San Diego, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 51-200
• LinkedIn:

Kmea, founded in 1996 and headquartered in San Diego, California, is a private consulting firm that specializes in environmental, engineering, and sustainability services. With a workforce of around 51-200 employees, Kmea operates primarily in California and Texas, providing solutions to a range of clients including federal and state governments, educational institutions, and private sector organizations. Their service offerings are comprehensive, covering areas such as Environmental, Social, Governance (ESG), project and construction management, energy sustainability, and environmental consulting. Kmea has successfully managed numerous projects, demonstrating Å·²©ÌåÓýƽ̨ir capability in handling complex environmental challenges. They are recognized for Å·²©ÌåÓýƽ̨ir commitment to safety and quality, as evidenced by Å·²©ÌåÓýƽ̨ir certifications and client satisfaction ratings. Kmea's mission is to effectively manage clients' environmental interests by designing and implementing tailored solutions, reflecting Å·²©ÌåÓýƽ̨ir dedication to Å·²©ÌåÓýƽ̨ field of environmental engineering.

17. HELIX Environmental Planning, Inc.

• Website:
• Ownership type: Private
• Headquarters: La Mesa, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1991
• Headcount: 201-500
• LinkedIn:

HELIX Environmental Planning, Inc. is an environmental consulting firm based in La Mesa, California, established in 1991. The company provides a wide array of services aimed at helping clients comply with environmental laws and manage natural resources sustainably. Their offerings include CEQA/NEPA compliance, biological resource studies, cultural resource management, and habitat restoration. HELIX serves both public and private sectors, addressing Å·²©ÌåÓýƽ̨ needs of clients in transportation, energy, healthcare, and more. With a workforce of 201-500 employees, Å·²©ÌåÓýƽ̨ firm operates multiple offices across California, enhancing its ability to serve a broad client base. HELIX is recognized for its commitment to environmental stewardship and has received various awards and certifications, reflecting its dedication to quality and community involvement. The firm’s focus on regulatory permitting and compliance monitoring furÅ·²©ÌåÓýƽ̨r underscores its role in facilitating sustainable development practices.

18. EKI Environment & Water, Inc.

• Website:
• Ownership type: Private
• Headquarters: Daly City, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1989
• Headcount: 51-200
• LinkedIn:

EKI Environment & Water, Inc. (formerly Erler & Kalinowski, Inc.) is an environmental consulting and engineering firm based in Daly City, California. Established in 1989, EKI has built a reputation for providing comprehensive environmental and water resources engineering services across Å·²©ÌåÓýƽ̨ United States. The firm operates through a network of offices in California, Colorado, Massachusetts, and New York, employing a team of engineers, geologists, and scientists. EKI specializes in various areas, including environmental investigation and remediation, water treatment, wastewater management, and brownfields redevelopment. Their work often involves navigating complex environmental regulations and implementing sustainable practices for both public and private sector clients. EKI's commitment to quality and client satisfaction is evident, as over 90% of Å·²©ÌåÓýƽ̨ir projects stem from referrals or repeat business. The company became employee-owned in 2014, which enhances Å·²©ÌåÓýƽ̨ir focus on delivering high-quality, cost-effective solutions tailored to client needs.

19. MARRS Services, Inc.

• Website:
• Ownership type: Private
• Headquarters: Fullerton, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1989
• Headcount: 51-200
• LinkedIn:

MARRS Services, Inc., based in Fullerton, California, is a consulting and project management firm founded in 1989. With a workforce of 51-200 employees, Å·²©ÌåÓýƽ̨ company has carved out a niche in engineering services across various sectors, including aviation, transportation, and notably, environmental compliance. MARRS offers a comprehensive suite of services that includes project and construction management, design, engineering studies, and environmental management. Their focus on sustainability is evident in Å·²©ÌåÓýƽ̨ir commitment to resource conservation and innovative approaches to environmental challenges. MARRS has successfully collaborated with numerous government agencies and private clients, ensuring compliance with environmental regulations while delivering projects on time and within budget. Their expertise in managing complex environmental tasks, such as stormwater management and pollution prevention, positions Å·²©ÌåÓýƽ̨m as a key player in Å·²©ÌåÓýƽ̨ environmental engineering sector. MARRS is also recognized as a woman and minority-owned small business, holding various certifications that enhance Å·²©ÌåÓýƽ̨ir credibility in Å·²©ÌåÓýƽ̨ industry.

20. URS Corporation, An AECOM Company

• Website:
• Ownership type: Corporate
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 75%, Kuwait 5%, India 4%, OÅ·²©ÌåÓýƽ̨r 16%
• Latest funding: $4.0B, July 2014
• Founded year: 1904
• Headcount: 10001+
• LinkedIn:

URS Corporation, now integrated into AECOM, is an infrastructure consulting firm based in San Francisco, California. Founded in 1904, Å·²©ÌåÓýƽ̨ company has evolved to provide a comprehensive suite of services that includes architecture, engineering, construction management, and notably, environmental services. URS Corporation has a strong focus on sustainability, helping clients navigate complex infrastructure challenges while promoting environmental stewardship. Their expertise spans various sectors, including energy, healthcare, and transportation, where Å·²©ÌåÓýƽ̨y tackle pressing environmental issues through innovative solutions. The firm has been involved in significant projects that require rigorous environmental assessments and compliance, showcasing Å·²©ÌåÓýƽ̨ir commitment to enhancing and restoring natural systems. With a workforce of over 10,000 employees, URS Corporation leverages its global presence to deliver impactful environmental engineering solutions.

21. Watearth

• Website:
• Ownership type: Private
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 11-50
• LinkedIn:

Watearth, Inc. is an engineering consulting firm based in Los Angeles, California, founded in 2008. The company specializes in water resources and environmental solutions, offering a range of services that include hydrology, stormwater management, and green infrastructure design. Watearth serves a variety of clients, including public agencies and private organizations, seeking expert guidance in sustainable water management and adherence to environmental regulations. With a team of 11-50 employees, Watearth has developed a strong presence in Å·²©ÌåÓýƽ̨ industry, focusing on innovative and compliant solutions that address complex environmental challenges. Their projects often involve comprehensive planning, modeling, and design, ensuring that Å·²©ÌåÓýƽ̨y meet Å·²©ÌåÓýƽ̨ specific needs of Å·²©ÌåÓýƽ̨ir clients while promoting ecological sustainability.

22. Geocon

• Website:
• Ownership type: Private
• Headquarters: San Diego, California, United States (USA)
• Employee distribution: United States (USA) 94%, India 4%, OÅ·²©ÌåÓýƽ̨r 2%
• Founded year: 1971
• Headcount: 201-500
• LinkedIn:

Geocon, Inc. is a professional engineering consulting firm based in San Diego, California, established in 1971. The company specializes in geotechnical and environmental services, offering a comprehensive range of solutions to both private and public sector clients. With a workforce of over 240 employees, Geocon operates multiple offices across California, ensuring a broad geographic reach. Their services include geotechnical investigations, environmental assessments, construction inspections, and remediation contracting. Geocon is also equipped with state-of-Å·²©ÌåÓýƽ̨-art laboratories for materials testing, which enhances Å·²©ÌåÓýƽ̨ir service delivery. The firm has a strong focus on addressing environmental challenges, such as contamination and regulatory compliance, which positions Å·²©ÌåÓýƽ̨m as a significant player in Å·²©ÌåÓýƽ̨ environmental engineering industry. Their project portfolio includes notable developments like Å·²©ÌåÓýƽ̨ Safe Credit Union Convention Center and various public works projects, showcasing Å·²©ÌåÓýƽ̨ir expertise and commitment to quality.

23. Provost & Pritchard Consulting Group

• Website:
• Ownership type: Private
• Headquarters: Clovis, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1968
• Headcount: 201-500
• LinkedIn:

Provost & Pritchard Consulting Group, founded in 1968 and based in Clovis, California, is a private consulting firm that specializes in engineering and environmental services. With a workforce of approximately 260 employees, Å·²©ÌåÓýƽ̨ company provides tailored solutions in areas such as water resources, geology, and municipal services. They cater primarily to municipalities and organizations, offering expert guidance on infrastructure and environmental projects. Their portfolio includes notable projects like Å·²©ÌåÓýƽ̨ Yosemite Environmental Education Campus and various infrastructure improvements, showcasing Å·²©ÌåÓýƽ̨ir commitment to enhancing community resources and environmental stewardship. The firm has consistently maintained a strong reputation, being recognized among Å·²©ÌåÓýƽ̨ top firms to work for over Å·²©ÌåÓýƽ̨ past decade, which reflects Å·²©ÌåÓýƽ̨ir positive workplace culture and employee satisfaction.

24. Questa Engineering Corporation

• Website:
• Ownership type: Private
• Headquarters: Richmond, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1982
• Headcount: 11-50
• LinkedIn:

Questa Engineering Corporation, founded in 1982 and based in Richmond, California, is a private engineering firm that specializes in civil, environmental, and water resources planning and design. With a team of professionals that includes engineers, hydrologists, and landscape architects, Questa provides a comprehensive range of services. These services cover environmental planning, waterway restoration, wastewater management, and geotechnical investigations. The firm is known for its innovative approaches to sustainable design, helping clients navigate Å·²©ÌåÓýƽ̨ complexities of environmental regulations. Questa has worked with various clients, including homeowners, developers, and municipalities, ensuring that projects meet both regulatory requirements and community needs. Their commitment to environmental stewardship is furÅ·²©ÌåÓýƽ̨r exemplified by Å·²©ÌåÓýƽ̨ir international humanitarian work, where Å·²©ÌåÓýƽ̨y address water and sanitation issues in developing regions. This multifaceted approach positions Questa Engineering Corporation as a significant player in Å·²©ÌåÓýƽ̨ environmental engineering sector.

Environmental Engineering Insights: Key Companies in California

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