Arizona's environmental consulting companies navigate the intricate world of compliance, assessments, and sustainability. They serve numerous sectors, providing services such as compliance management, environmental impact assessments, and remediation strategies. With increasing environmental awareness, the industry is evolving, focusing on innovative strategies to mitigate ecological footprints. There is a constant demand for expertise in areas like air and water quality, as businesses and governments aim for sustainable practices. Staying ahead of regulations and technological advancements will be critical for these firms as they adapt to growing environmental challenges and the push for greater transparency and social responsibility.


The list features 23 environmental consulting firms in Arizona, varying in size from small operations with fewer than 10 employees to larger organizations with thousands. They were founded between 1984 and 2014, indicating a mix of established expertise and fresh perspectives. Concentrated in Phoenix and Tucson, these firms specialize in a wide array of services, including air quality management, water resource planning, and environmental compliance. Each company brings unique strengths, shaping Arizona’s response to environmental challenges while prioritizing client satisfaction and sustainable practices.


Continue reading to learn about Arizona's premier environmental consulting companies.


Top 23 Environmental Consulting Companies in Arizona


1. SWCA Environmental Consultants

  • Website: swca.com
  • Ownership type: Private
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Founded year: 1981
  • Headcount: 1001-5000
  • LinkedIn: swca-environmental-consultants

SWCA Environmental Consultants, based in Phoenix, Arizona, is a private environmental consulting firm founded in 1981. With a workforce of approximately 1,505 employees, SWCA specializes in a broad range of services, including air quality management, cultural resource management, and spill response. The firm serves a variety of clients, including government agencies and private organizations across sectors such as land development and energy. SWCA is particularly noted for its expertise in helping clients navigate environmental compliance while promoting sustainability. The company is 100% employee-owned, which fosters a culture of investment in both the firm's success and the well-being of its clients. SWCA has received numerous awards for its commitment to client satisfaction and its innovative approaches to environmental challenges. Their projects span the United States and include significant contributions to ecological restoration, disaster recovery, and strategic environmental planning.


2. Sol Solutions, LLC

  • Website: solsolutions.net
  • Ownership type: Private
  • Headquarters: Scottsdale, Arizona, United States (USA)
  • Employee distribution: United States (USA) 89%, Puerto Rico 11%
  • Founded year: 2009
  • Headcount: 51-200
  • LinkedIn: sol-environmental-solutions

Sol Solutions, LLC, based in Scottsdale, Arizona, is an environmental consulting firm established in 2009. The company provides a comprehensive suite of services that includes environmental compliance, restoration, and sustainability planning. With a workforce of 51-200 employees, Sol Solutions primarily caters to government agencies, particularly the U.S. Army and Air Force, assisting them in navigating complex regulatory landscapes and managing environmental programs. Their expertise spans various areas, including multi-media environmental compliance, hazardous materials management, and cultural resource assessments. The firm is recognized as an 8(a) Certified, Service-Disabled Veteran-Owned Small Business, which underscores its commitment to high-quality service and ethical standards. Sol Solutions has built a reputation for delivering reliable and efficient environmental services, as evidenced by positive testimonials from clients in the federal sector.


3. EPG Environmental Planning Group, LLC

  • Website: epgllc.co
  • Ownership type: Private Equity
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 74%, Iran 26%
  • Latest funding: November 2012
  • Founded year: 1999
  • Headcount: 51-200
  • LinkedIn: epg-inc.-environmental-planning-group

EPG Environmental Planning Group, LLC, based in Phoenix, Arizona, is an environmental consulting firm that specializes in planning, permitting, and compliance services. Established in 1999, EPG has built a strong presence in the industry, assisting clients across various sectors, including energy, transportation, and telecommunications. The firm is dedicated to helping clients navigate the complexities of environmental regulations, ensuring project success while minimizing ecological impacts. EPG's services cover a broad spectrum, including biological and cultural resource assessments, environmental compliance management, and landscape architecture. Their expertise extends to significant projects in power generation, oil and gas, and transportation infrastructure. In 2020, EPG was acquired by Terracon, which has allowed them to expand their geographic presence and enhance their service offerings. This acquisition reflects EPG's strategic importance in the environmental consulting field and their ongoing commitment to providing sustainable solutions.


4. Vernadero Group Incorporated

  • Website: vernadero.com
  • Ownership type: Private
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1999
  • Headcount: 11-50
  • LinkedIn: vernadero-group-incorporated

Vernadero Group Incorporated, founded in 1999 and based in Phoenix, Arizona, is a private environmental consulting and engineering services firm. With a workforce of approximately 35 employees, the company has carved out a niche in providing technical support to various U.S. government entities. Their service offerings include environmental resource planning, regulatory compliance, air, water, soils, and hazards compliance, as well as biological resource management. Vernadero has a strong track record of working with federal, state, and regional agencies, demonstrating their capability in managing complex environmental projects. Their commitment to quality and client satisfaction is reflected in their repeat business and positive performance assessments. The firm is also recognized for its proactive approach to cybersecurity, having achieved compliance with the Department of Defense's Cybersecurity Maturity Model Certification (CMMC) 2.0 Level 2, which underscores their dedication to safeguarding sensitive information in their operations.


5. Engineering and Environmental Consultants, Inc.


Engineering and Environmental Consultants, Inc. (EEC) is an engineering and environmental consulting firm based in Tucson, Arizona, with a history dating back to 1987. The company specializes in a variety of services, including air quality management, civil engineering, and waste management. EEC primarily serves industries such as manufacturing and mining, assisting clients in navigating the complexities of environmental regulations and project requirements. With a workforce of 11 to 50 employees, the firm emphasizes a collaborative approach to problem-solving, ensuring that client goals align with environmental compliance and sustainability practices. EEC's commitment to quality service and client satisfaction is evident in their operational strategies and project execution.


6. WestLand, a Trinity Consultants Team

  • Website: westlandresources.com
  • Ownership type: Private
  • Headquarters: Tucson, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: $4.7M, February 2021
  • Founded year: 1997
  • Headcount: 201-500
  • LinkedIn: westland-resources

WestLand, a Trinity Consultants Team, is an engineering and environmental consulting firm based in Tucson, Arizona. Established in 1997, the company specializes in a variety of services that include cultural resources management, environmental planning, GIS, landscape architecture, and engineering. With a workforce of approximately 172 employees, WestLand serves a broad spectrum of clients, including government entities, developers, and industrial sectors. Their expertise is particularly valuable in helping clients navigate complex regulatory landscapes and ensuring compliance with environmental standards. In February 2021, WestLand secured funding amounting to over $4.6 million, which underscores their growth potential and commitment to enhancing their service offerings. The firm has also expanded its footprint through its recent integration with Trinity Consultants, which aims to leverage combined expertise to tackle intricate environmental challenges more effectively.


7. Harris Environmental Group, Inc

  • Website: heg-inc.com
  • Ownership type: Private
  • Headquarters: Tucson, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1993
  • Headcount: 51-200
  • LinkedIn: harris-environmental-group-inc.

Harris Environmental Group, Inc. is an environmental consulting firm based in Tucson, Arizona, with additional offices across several states including Colorado, Washington, New Mexico, Utah, Oregon, and California. Established in 1993, the company specializes in a variety of services aimed at assisting clients in meeting environmental regulations and managing natural resources effectively. Their offerings include environmental planning, cultural resources management, natural resources consulting, habitat restoration, geospatial analysis, and drone support. The firm serves a mix of private businesses and government agencies, showcasing their adaptability and expertise in addressing a wide range of environmental challenges. With a team of qualified professionals, including archaeologists and environmental scientists, Harris Environmental Group is well-equipped to handle complex projects that require compliance with federal and state environmental laws.


8. Certified Environmental Services, Inc


Certified Environmental Services, Inc. (CES) is a professional environmental consulting firm based in Phoenix, Arizona. Established in 1990, CES specializes in environmental risk assessment and management, providing a range of services that include Phase I and Phase II Environmental Site Assessments, Indoor Air Quality consulting, and hazardous waste management. The firm serves a variety of clients, including commercial and industrial property owners, financial institutions, and government agencies. CES is known for its thorough approach to environmental compliance, helping clients understand and meet regulatory requirements. The company prides itself on delivering tailored solutions that enhance cost-effectiveness and efficiency. With a team of experienced professionals, CES has conducted thousands of assessments across multiple states and has built a reputation for reliability and expertise in the environmental consulting field.


9. Montgomery & Associates

  • Website: elmontgomery.com
  • Ownership type: Private
  • Headquarters: Tucson, Arizona, United States (USA)
  • Employee distribution: United States (USA) 63%, Chile 23%, Argentina 14%
  • Founded year: 1984
  • Headcount: 51-200
  • LinkedIn: montgomery-%26-associates

Montgomery & Associates (M&A) is a consulting firm based in Tucson, Arizona, specializing in hydrogeology and water resource management. Founded in 1984, the company has built a solid reputation for its expertise in groundwater and surface water issues. M&A offers a comprehensive suite of services, including water supply planning, environmental hydrogeology, groundwater modeling, and data management services. Their clientele spans various sectors, such as agriculture, mining, and municipal water agencies, indicating their broad applicability in addressing water-related challenges. The firm has also expanded its reach into South America, with significant operations in Chile and Argentina. M&A is known for its technical innovation and science-based solutions, helping clients navigate the complexities of water resource management and regulatory compliance. Their involvement in community engagement initiatives, such as scholarships for hydrology students and support for local non-profits, further underscores their commitment to fostering future water professionals and promoting sustainable practices in the industry.


10. KCB Consultants Ltd.

  • Website: kcbconsultants.com
  • Ownership type: Private
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: Australia 47%, Canada 28%, Peru 11%, Other 15%
  • Founded year: 2013
  • Headcount: 1-10
  • LinkedIn: kcb-consultants-ltd

KCB Consultants Ltd. is an engineering consulting firm based in Phoenix, Arizona, specializing in geoscience and environmental services. Founded in 2013, the company operates as the U.S. subsidiary of Klohn Crippen Berger, an internationally recognized engineering consulting company. KCB Consultants provides expert consulting to businesses and organizations, emphasizing responsible resource use and lifecycle management of facilities. Their service offerings include engineering, geoscience, and environmental consulting, addressing the needs of clients across various industries. The firm is dedicated to integrating environmental and social considerations into their projects, ensuring that their solutions are not only effective but also sustainable. With a small team of around 46 employees, KCB Consultants is actively involved in the industry, seeking to grow their team and expand their impact.


11. Earthworks Environmental, LLC


Earthworks Environmental, LLC is an environmental consulting firm based in Phoenix, Arizona, founded in 2014. The company specializes in compliance management services, particularly in stormwater pollution prevention and dust control. They assist businesses and organizations in understanding and adhering to environmental regulations, helping them avoid potential violations. Earthworks has developed its own software solution, ERX, which facilitates records retention and digital inspections, making compliance management more efficient for their clients. Over the years, Earthworks has built strong relationships with regulatory bodies, which aids in maintaining their clients' compliance status. The firm has expanded its reach significantly, now providing services across 26 markets nationwide. Their team is composed of knowledgeable professionals dedicated to fostering a culture of excellence and environmental stewardship.


12. ETD Inc.

  • Website: etd-inc.com
  • Ownership type: Private
  • Headquarters: Flagstaff, Arizona, United States (USA)
  • Founded year: 1995
  • Headcount: 1-10
  • LinkedIn: etd-inc-

ETD Inc., founded in 1995 and based in Flagstaff, Arizona, is a consulting firm dedicated to environmental compliance and project management services. The company has a strong focus on assisting federal, tribal, and private partners in navigating the unique challenges associated with projects on tribal lands. With a track record of over 500 projects and service to more than 260 tribal communities, ETD Inc. has established itself as a trusted ally in the field. Their offerings include environmental compliance, public relations, natural resource planning, and strategic planning, all tailored to meet the specific needs of their clients. The firm prides itself on its ability to foster community relationships and ensure compliance with environmental regulations, making it a valuable partner for initiatives that aim to enhance the quality of life in tribal areas.


13. Transcon Environmental

  • Website: transcon.com
  • Ownership type: Private
  • Headquarters: Mesa, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1999
  • Headcount: 51-200
  • LinkedIn: transcon-environmental

Transcon Environmental, founded in 1999 and based in Mesa, Arizona, is an environmental consulting firm that specializes in a broad spectrum of services. The company focuses on forestry and utility management, environmental assessments, and sustainability solutions. They cater to a variety of sectors, including agriculture, electric utilities, and municipalities, assisting clients in navigating complex environmental regulations. Transcon's team comprises experts in ecology, archaeology, and environmental planning, among other fields, which enhances their capability to deliver tailored solutions. Their commitment to sustainability and environmental stewardship is evident in their approach to projects, where they aim to balance client needs with ecological considerations. As a private company with a workforce of 51-200 employees, Transcon Environmental has maintained a steady presence in the industry, emphasizing innovation and collaboration in their service delivery.


14. Certerra (Western Technologies)

  • Website: wt-us.com
  • Ownership type: Private
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 99%, Other 1%
  • Founded year: 1955
  • Headcount: 201-500
  • LinkedIn: western-technologies

Certerra (Western Technologies), based in Phoenix, Arizona, is a private engineering firm that specializes in environmental consulting, geotechnical engineering, materials testing, and non-destructive testing services. Founded in 1955, the company has nearly 70 years of experience in providing high-quality engineering solutions. They serve clients across multiple sectors, including transportation, healthcare, and mining, ensuring compliance and project integrity. Their environmental consulting services include property site assessments, risk assessments, and remediation strategies, which are essential for managing environmental risks. In 2021, Western Technologies merged with RMA Companies, enhancing their service capabilities and geographic reach. This merger reflects their commitment to evolving with industry demands and expanding their expertise in environmental consulting and related fields.


15. Environmental Technology, LLC

  • Website: entech-us.com
  • Ownership type: Private
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1990
  • Headcount: 11-50
  • LinkedIn: entech-phoenix

Environmental Technology, LLC, based in Phoenix, Arizona, is an environmental consulting firm that has been operational since 1990. The company specializes in a wide array of services, including environmental consulting, remediation, and regulatory compliance. Their team consists of environmental scientists, engineers, and geologists who work collaboratively to solve clients' environmental issues in a cost-effective manner. Environmental Technology, LLC assists clients in navigating the complexities of federal, state, and local environmental regulations, ensuring compliance and addressing contamination challenges effectively. They have a strong focus on services such as underground storage tank management, aquifer protection permits, and Phase I Environmental Site Assessments. The firm has built a reputation for its technical expertise and innovative use of technology in environmental problem-solving, making it a relevant player in the environmental consulting industry.


16. Galileo Project LLC

  • Website: galileoaz.com
  • Ownership type: Private
  • Headquarters: Tempe, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2010
  • Headcount: 11-50
  • LinkedIn: galileo-project-llc

Galileo Project LLC, founded in 2010 and based in Tempe, Arizona, is a consulting firm that specializes in project management assistance and coordination (PMAC) for environmental compliance projects. The firm provides essential support to federal, state, and local agencies, helping them navigate the intricate regulatory landscape associated with environmental projects. With a team of professionals who possess extensive experience in NEPA processes, cultural and natural resource management, and public involvement, Galileo has successfully assisted agency staff on over 50 nationally significant infrastructure and energy projects. Their work includes facilitating stakeholder engagement, managing public outreach, and ensuring compliance with environmental regulations. As a wholly-owned subsidiary of Merjent, Inc., Galileo Project LLC enhances its capabilities by integrating a broader range of environmental, engineering, and restoration services, making it a notable player in the environmental consulting industry.


17. Fortech Energy Inc

  • Website: fortechenergyinc.com
  • Ownership type: Private
  • Headquarters: Tempe, Arizona, United States (USA)
  • Employee distribution: India 67%, United States (USA) 33%
  • Founded year: 1997
  • Headcount: 501-1000
  • LinkedIn: fortech-energy-inc

Fortech Energy Inc, founded in 1997 and based in Tempe, Arizona, is a private consulting firm that specializes in IT solutions and advisory services for the energy, water, and environmental sectors. With a workforce of around 18 employees, the company has carved out a niche in providing a wide array of services aimed at enhancing operational efficiency and ensuring compliance with regulatory requirements. Fortech's service portfolio includes SAP consulting, clean energy solutions, and environmental risk management. They have developed a strong practice in clean energy and environmental consulting, offering services such as carbon and energy advisory, climate change mitigation strategies, and waste-to-energy solutions. Their expertise extends to conducting environmental impact assessments and providing guidance on compliance and certification processes. Fortech has also been involved in sustainability projects sponsored by organizations like the World Bank and the United Nations, showcasing their commitment to addressing global environmental issues.


18. Ncs Engineers

  • Website: ncseng.com
  • Ownership type: Private Equity
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: April 2025
  • Founded year: 1998
  • Headcount: 51-200
  • LinkedIn: ncs-engineers

Ncs Engineers, founded in 1998 and based in Phoenix, Arizona, is an engineering consulting firm that specializes in water and wastewater services. With a dedicated team of professionals, the company provides a wide range of services including drinking water quality assessments, wastewater management, and regulatory compliance assistance. Ncs Engineers has established a reputation for delivering high-quality, timely, and cost-effective solutions tailored to the specific needs of their clients. Their clientele includes public agencies and private sector organizations, reflecting their capability to address various challenges in water resource management. Over the years, Ncs Engineers has been involved in significant projects that have contributed to advancements in water treatment methods and regulatory compliance. They have also engaged in water quality research, partnering with universities and research organizations to develop new technologies. With multiple offices across the United States, Ncs Engineers continues to play a vital role in the water engineering sector, focusing on innovative and sustainable practices.


19. EnviroSystems Management, Inc.

  • Website: esmaz.com
  • Ownership type: Private
  • Headquarters: Flagstaff, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1999
  • Headcount: 11-50
  • LinkedIn: envirosystems-management

EnviroSystems Management, Inc. is an environmental consulting firm based in Flagstaff, Arizona, with a focus on regulatory compliance and environmental planning. Established in 1999, the company has built a strong track record of success, particularly in the Southwest and other western states. With a team of qualified professionals, EnviroSystems provides expert guidance to clients navigating complex environmental regulations. Their services include public relations, cultural resource management, natural and biological resources management, and geospatial analysis. The firm has worked on a variety of projects, collaborating with federal agencies, utility companies, and Native American tribes, among others. Their commitment to professional integrity and client satisfaction is evident in their high rate of repeat business, with nearly 75% of ongoing projects coming from satisfied clients. EnviroSystems is also recognized as a woman-owned small business and holds certifications that enhance its standing in the industry.


20. Logan Simpson

  • Website: logansimpson.com
  • Ownership type: Private
  • Headquarters: Tempe, Arizona, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1990
  • Headcount: 51-200
  • LinkedIn: logan-simpson

Logan Simpson is an environmental consulting firm based in Tempe, Arizona, with additional offices in Colorado, Utah, and Nevada. Established in 1990, the company specializes in environmental planning, cultural resources, community planning, and landscape architecture. They assist a variety of clients, including government agencies and private enterprises, in navigating complex regulatory processes and developing sustainable project solutions. Logan Simpson emphasizes responsible change, aiming to create a positive impact on the environments they work in. Their interdisciplinary approach integrates public involvement and innovative engagement techniques, ensuring that community voices are heard in the planning process. The firm has received recognition for its projects, showcasing its commitment to excellence and community collaboration. With a team of skilled professionals, Logan Simpson continues to contribute significantly to the environmental consulting industry.


21. AZTEC Engineering Group, Inc.

  • Website: aztec.us
  • Ownership type: Corporate
  • Headquarters: Phoenix, Arizona, United States (USA)
  • Employee distribution: United States (USA) 98%, Other 2%
  • Latest funding: January 2006
  • Founded year: 1992
  • Headcount: 201-500
  • LinkedIn: aztec-engineering

AZTEC Engineering Group, Inc., established in 1992 and headquartered in Phoenix, Arizona, is a consulting firm that specializes in engineering and environmental solutions. The company serves both public and private clients, providing a wide array of services that include transportation, renewable energy engineering, and construction management. AZTEC is part of the TYPSA Group, an international firm that enhances its capabilities and reach. The firm is recognized for its innovative approaches and strong project management, focusing on long-term client relationships. AZTEC's work spans various sectors, with a notable emphasis on renewable energy projects, including solar power plants. Their proprietary software, PVGRAd™, showcases their commitment to advancing technology in environmental engineering. With a workforce of over 200 employees, AZTEC is well-positioned to tackle complex infrastructure projects while prioritizing environmental sustainability.


22. Clear Creek Associates


Clear Creek Associates, founded in 1999 and based in Scottsdale, Arizona, is a consulting firm that specializes in groundwater science and environmental services. With a team of approximately 40 professionals, including hydrologists, hydrogeologists, and environmental scientists, the firm has successfully completed over 1,000 projects for more than 300 clients. Their clientele includes municipalities, private water companies, industrial firms, and regulatory agencies, all of whom rely on Clear Creek's expertise to navigate complex water-related challenges. The firm offers a range of services, including water resource management, environmental assessments, mining support, and groundwater modeling. As a wholly owned subsidiary of Geo-Logic Associates, Clear Creek Associates collaborates with other firms to provide comprehensive geological and hydrogeological consulting services. Their commitment to practical solutions in groundwater science positions them as a significant player in the environmental consulting industry.


23. JE Fuller/Hydrology & Geomorphology, Inc


JE Fuller/Hydrology & Geomorphology, Inc. is an engineering consulting firm based in Tempe, Arizona, founded in 1995. The company specializes in hydrology, hydraulics, and environmental services, providing expert solutions to both public and private clients primarily in the Southwest United States. With a team of approximately 34 employees, JE Fuller focuses on flood risk management, dam safety, and regulatory compliance, offering a range of services that include planning studies, engineering design, and applied fluvial geomorphology. The firm operates under a client-driven model, emphasizing personalized service and technical expertise. Their commitment to environmental compliance is evident through their work with various federal agencies, ensuring that projects meet necessary regulations. JE Fuller has built a reputation for delivering high-quality work and maintaining strong relationships with clients, which is reflected in their repeat business. The company is 100% employee-owned, fostering a culture of trust and integrity among its staff.



Environmental Consulting Insights: Key Companies in Arizona


CompanyHeadquarterSizeFoundedOwnership
SWCA Environmental ConsultantsPhoenix, Arizona, United States (USA)1001-50001981Private
Sol Solutions, LLCScottsdale, Arizona, United States (USA)51-2002009Private
EPG Environmental Planning Group, LLCPhoenix, Arizona, United States (USA)51-2001999Private Equity
Vernadero Group IncorporatedPhoenix, Arizona, United States (USA)11-501999Private
Engineering and Environmental Consultants, Inc.Tucson, Arizona, United States (USA)11-501987Corporate
WestLand, a Trinity Consultants TeamTucson, Arizona, United States (USA)201-5001997Private
Harris Environmental Group, IncTucson, Arizona, United States (USA)51-2001993Private
Certified Environmental Services, IncPhoenix, Arizona, United States (USA)1-101990Private
Montgomery & AssociatesTucson, Arizona, United States (USA)51-2001984Private
KCB Consultants Ltd.Phoenix, Arizona, United States (USA)1-102013Private
Earthworks Environmental, LLCPhoenix, Arizona, United States (USA)51-2002014Private
ETD Inc.Flagstaff, Arizona, United States (USA)1-101995Private
Transcon EnvironmentalMesa, Arizona, United States (USA)51-2001999Private
Certerra (Western Technologies)Phoenix, Arizona, United States (USA)201-5001955Private
Environmental Technology, LLCPhoenix, Arizona, United States (USA)11-501990Private
Galileo Project LLCTempe, Arizona, United States (USA)11-502010Private
Fortech Energy IncTempe, Arizona, United States (USA)501-10001997Private
Ncs EngineersPhoenix, Arizona, United States (USA)51-2001998Private Equity
EnviroSystems Management, Inc.Flagstaff, Arizona, United States (USA)11-501999Private
Logan SimpsonTempe, Arizona, United States (USA)51-2001990Private
AZTEC Engineering Group, Inc.Phoenix, Arizona, United States (USA)201-5001992Corporate
Clear Creek AssociatesScottsdale, Arizona, United States (USA)11-501999Private
JE Fuller/Hydrology & Geomorphology, IncTempe, Arizona, United States (USA)11-501995Private


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