Environmental engineering companies in Texas play a vital role in developing sustainable solutions to pressing ecological challenges. They focus on protecting natural resources while aiding industries in adhering to regulations on waste management, pollution control, and compliance. These firms are increasingly leveraging advanced technologies to enhance efficiency and promote renewables, reflecting a shift towards greener practices. Additionally, the Texas industry is witnessing a notable evolution, with many companies working closely with state agencies to promote environmental resilience amid changing climate conditions.


The companies in this list reflect a breadth of expertise in environmental engineering, ranging from large firms with thousands of employees to smaller boutique setups. Most were founded between the 1940s and 2000s, and their headquarters span Texas cities like Austin, Dallas, and Houston. Services range from water management to environmental compliance, showcasing each company’s unique specialization and approach to addressing environmental challenges effectively.


Discover the top environmental engineering companies making an impact in Texas.


Top 25 Environmental Engineering Companies in Texas


1. Trinity Consultants

  • Website: trinityconsultants.com
  • Ownership type: Private Equity
  • Headquarters: Dallas, Texas, United States (USA)
  • Employee distribution: United States (USA) 93%, Canada 3%, Other 4%
  • Latest funding: June 2021
  • Founded year: 1974
  • Headcount: 1001-5000
  • LinkedIn: trinity-consultants

Trinity Consultants, based in Dallas, Texas, is a consulting firm that specializes in environmental consulting, engineering, and technology solutions. Established in 1974, the company has built a reputation for assisting businesses across multiple sectors in navigating complex regulatory landscapes and enhancing their sustainability efforts. Their service offerings include environmental assessments, compliance solutions, and software development tailored to industries such as manufacturing, energy, and life sciences. Trinity Consultants also provides training programs to help organizations address environmental challenges effectively. With a workforce of approximately 1,839 employees, the firm operates primarily in the United States, with a small presence in Canada and other regions. Their commitment to quality and client responsiveness has allowed them to maintain relevance in the environmental engineering sector.


2. INTERA Incorporated

  • Website: intera.com
  • Ownership type: Private
  • Headquarters: Austin, Texas, United States (USA)
  • Employee distribution: United States (USA) 88%, France 4%, Australia 3%, Other 4%
  • Founded year: 1974
  • Headcount: 201-500
  • LinkedIn: intera

INTERA Incorporated, founded in 1974 and based in Austin, Texas, is a consulting firm that specializes in environmental and water resource management. With a workforce of approximately 266 employees, the company provides a wide array of services, including air quality consulting, coastal engineering, and radioactive waste management. Their expertise extends to specialty services such as climate resiliency, uncertainty analysis, and carbon storage. INTERA serves a variety of industries, including mining, water utilities, oil and gas, and power and energy, among others. The firm is committed to helping clients navigate environmental regulations and implement sustainable practices, demonstrating a strong focus on innovation and stewardship for a sustainable future. Their projects often involve complex environmental challenges, showcasing their capability to deliver effective solutions. INTERA's client base includes both private businesses and government organizations, reflecting their established presence in the environmental consulting sector.


3. Halff

  • Website: halff.com
  • Ownership type: Private
  • Headquarters: Richardson, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1950
  • Headcount: 1001-5000
  • LinkedIn: halff-associates

Halff Associates, Inc., founded in 1950 and based in Richardson, Texas, is a private engineering and consulting firm with a workforce of over 1,300 employees. The company specializes in infrastructure and community development, offering a wide array of services that include mobility, environmental solutions, flood infrastructure design, and water management. Halff serves both public and private sector clients, focusing on sustainable practices that improve community resilience and quality of life. Their projects often integrate environmental considerations, such as water quality improvements and flood risk mitigation, showcasing their commitment to addressing pressing environmental issues. Halff's expertise in areas like watershed planning and flood control further solidifies their role in the environmental engineering industry.


4. Raba Kistner, Inc.

  • Website: rkci.com
  • Ownership type: Corporate
  • Headquarters: San Antonio, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: January 2019
  • Founded year: 1968
  • Headcount: 501-1000
  • LinkedIn: rabakistner

Raba Kistner, Inc. is an engineering consulting and program management firm based in San Antonio, Texas, founded in 1968. With a workforce of approximately 705 employees, the company specializes in a variety of services that include environmental compliance, project management, and engineering solutions. Raba Kistner serves a wide range of clients, from private businesses to government entities, helping them navigate complex regulatory landscapes and ensuring project success. Their offerings in environmental engineering are particularly noteworthy, as they provide services such as environmental due diligence, air quality permitting, and compliance management. The firm is dedicated to building a sustainable future, emphasizing the importance of environmental stewardship in all their projects. Their extensive experience across sectors like civil infrastructure, energy, and healthcare further solidifies their role in the environmental engineering industry.


5. Gunda Corporation - An Ardurra Company

  • Website: gundacorp.com
  • Ownership type: Corporate
  • Headquarters: Houston, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: January 2022
  • Founded year: 2001
  • Headcount: 51-200
  • LinkedIn: gunda-corporation

Gunda Corporation, now part of Ardurra, is an engineering firm based in Houston, Texas, founded in 2001. The company provides a wide array of services, particularly in water and wastewater treatment, environmental consulting, and transportation planning. Gunda Corporation collaborates with municipalities and private utilities, focusing on innovative solutions to tackle infrastructure and environmental challenges. Their expertise extends to various markets, emphasizing technical proficiency and collaboration in project execution. The firm is dedicated to delivering practical and effective solutions that not only meet client needs but also respect environmental considerations. With a team of experienced professionals, Gunda Corporation plays a significant role in enhancing community infrastructure while promoting sustainable practices.


6. LCA Environmental, Inc.

  • Website: lcaenvironmental.com
  • Ownership type: Private
  • Headquarters: Farmers Branch, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1992
  • Headcount: 11-50
  • LinkedIn: lca-environmental-inc-

LCA Environmental, Inc. is an environmental consulting firm based in Farmers Branch, Texas, founded in 1992. With a team of 17 employees, the company specializes in engineering solutions that address environmental compliance and risk management. Over its nearly 30 years of operation, LCA has built a reputation for providing practical and sustainable solutions to a variety of clients, including businesses and government entities. Their services range from site assessments and waste management to regulatory compliance and technical support. Notably, LCA has worked on significant projects such as the LBJ Freeway renovation and environmental assessments for educational institutions like Richland College and Eastfield College. The firm is recognized as a woman-owned business and has received various certifications, including those from the Texas Commission on Environmental Quality and the Texas Department of Licensing and Regulation. LCA Environmental is committed to helping clients navigate the complexities of environmental regulations while promoting sustainable practices.


7. Baer Engineering & Environmental Consulting, Inc.


Baer Engineering & Environmental Consulting, Inc., based in Austin, Texas, has been providing specialized engineering and environmental services since its inception in 1992. The firm operates with a workforce of 11 to 50 employees and has maintained a steady growth rate, achieving average annual revenues of $5.47 million. Baer Engineering offers a comprehensive range of services, including environmental compliance, industrial hygiene, and cultural resource management. Their clientele spans educational institutions, government agencies, and commercial developers, reflecting their ability to cater to various sectors. The company prides itself on high-quality service delivery and client satisfaction, which has helped them build a strong reputation in the industry. Additionally, Baer Engineering is recognized as a Platinum Certified Austin Green Business Leader, demonstrating their commitment to sustainability and responsible engineering practices. They also provide training services related to environmental health and safety, further contributing to the industry's knowledge base.


8. BGE, Inc.

  • Website: bgeinc.com
  • Ownership type: Private
  • Headquarters: Houston, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1975
  • Headcount: 1001-5000
  • LinkedIn: bgeinc

BGE, Inc. is an engineering consulting firm based in Houston, Texas, established in 1975. With a workforce of approximately 1,294 employees, the company specializes in a variety of services, including construction management, environmental consulting, land/site development, and planning. BGE, Inc. serves both private businesses and government entities, assisting them in managing complex projects while adhering to regulatory requirements. Their environmental services are particularly noteworthy, as they help clients navigate the evolving landscape of environmental regulations at local, state, and federal levels. This includes conducting environmental site assessments, managing waste, and ensuring compliance with air quality standards. BGE, Inc. is dedicated to creating sustainable solutions that benefit both clients and the communities they serve, reflecting a commitment to environmental stewardship.


9. Ensolum, LLC

  • Website: ensolum.com
  • Ownership type: Private
  • Headquarters: Dallas, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2018
  • Headcount: 51-200
  • LinkedIn: ensolum-llc

Ensolum, LLC is an environmental consulting firm based in Dallas, Texas, founded in 2018. With a workforce of approximately 114 employees, the company specializes in a variety of environmental services, including air quality assessments, biological resource services, and remediation efforts. Ensolum serves both private and public sector clients, assisting them in navigating complex environmental compliance and safety challenges. Their expertise extends across North America and the Pacific Rim, allowing them to tackle a wide array of environmental issues. The firm prides itself on hiring top environmental consultants and maintaining efficiency while adapting to the evolving needs of its clients. Ensolum's project portfolio includes significant work in industrial hygiene, stormwater compliance, and environmental site assessments, showcasing their capability to manage complex environmental projects effectively.


10. Az&b

  • Website: azb-engrs.com
  • Ownership type: Private
  • Headquarters: Dallas, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1981
  • Headcount: 11-50
  • LinkedIn: az%26b

Az&b, known as Ardurra, is a private engineering firm based in Dallas, Texas, founded in 1981. With a workforce of 11 to 50 employees, the company specializes in a wide array of services, including water and wastewater treatment, environmental consulting, and civil engineering. Ardurra serves municipalities, private utilities, and businesses, providing innovative solutions to infrastructure and environmental challenges. Their environmental services cover areas such as federal, state, and local environmental permitting, wetland delineations, and ecosystem restoration. The firm is committed to ensuring compliance and sustainability in its projects, making a significant impact in the environmental engineering sector.


11. Poznecki-Camarillo

  • Website: pozcam.com
  • Ownership type: Family Owned
  • Headquarters: San Antonio, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1981
  • Headcount: 51-200
  • LinkedIn: poznecki-camarillo-inc.

Poznecki-Camarillo, LLC, based in San Antonio, Texas, is a family-owned consulting firm founded in 1981. The company specializes in engineering, environmental planning, surveying, and public involvement services. With a team of skilled professionals, Poznecki-Camarillo provides essential expertise to both government agencies and private developers. Their environmental services include planning and permitting, NEPA documentation, and environmental impact assessments, among others. The firm emphasizes innovative solutions that address regulatory requirements while engaging communities effectively. Over the years, Poznecki-Camarillo has built a reputation for quality service and community impact, making significant contributions to various projects across Texas. They are committed to fostering relationships and ensuring compliance with environmental regulations, which is crucial in today's regulatory environment.


12. Ref-Chem

  • Website: ref-chem.com
  • Ownership type: Private
  • Headquarters: Odessa, Texas, United States (USA)
  • Founded year: 1957
  • Headcount: 501-1000
  • LinkedIn: ref-chem

Ref-Chem, a subsidiary of Burns & McDonnell, is based in Odessa, Texas, and has been operational since 1957. The company specializes in engineering and construction services across various sectors, with a strong emphasis on environmental engineering. Ref-Chem provides comprehensive solutions that include environmental studies, permitting, and compliance services. Their expertise extends to air quality management, remediation of contaminated sites, and solid waste recovery. The firm is committed to addressing the infrastructure and compliance needs of both government and private sector clients, ensuring that projects meet environmental standards and promote sustainability. With a workforce of approximately 457 employees, Ref-Chem is positioned to tackle complex environmental challenges and contribute to the development of sustainable practices in engineering and construction.


13. Parkhill

  • Website: parkhill.com
  • Ownership type: Corporate
  • Headquarters: Lubbock, Texas, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Latest funding: November 2012
  • Founded year: 1945
  • Headcount: 501-1000
  • LinkedIn: parkhill-smith-%26-cooper

Parkhill is an architecture and engineering firm based in Lubbock, Texas, established in 1945. With a workforce of approximately 566 employees, the company provides a wide array of services, including construction management, environmental engineering, and site development. Parkhill serves a variety of clients, including government entities, educational institutions, and private developers, with a strong emphasis on creating functional and sustainable spaces. Their environmental engineering services are particularly noteworthy, focusing on solid waste management and compliance with environmental regulations. The firm has built a reputation for its collaborative approach, working closely with stakeholders to meet current and future environmental goals. Parkhill's commitment to enhancing community quality of life through thoughtful design and engineering solutions is central to their mission.


14. Enprotec / Hibbs & Todd, Inc. (eHT)

  • Website: e-ht.com
  • Ownership type: Private
  • Headquarters: Abilene, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1989
  • Headcount: 51-200
  • LinkedIn: enprotec-hibbs-%26-todd-inc-

Enprotec / Hibbs & Todd, Inc. (eHT) is an engineering firm based in Abilene, Texas, established in 1989. With a workforce of approximately 74 employees, eHT specializes in civil, environmental, and geotechnical engineering. The company offers a comprehensive range of services, including water supply planning, wastewater treatment, environmental consulting, and solid waste management. eHT is dedicated to enhancing community infrastructure while ensuring compliance with environmental regulations. Their projects often involve collaboration with municipalities and private developers, showcasing their ability to address both public and private sector needs. The firm has successfully managed numerous projects, contributing to over $800 million in water and wastewater initiatives, demonstrating their significant impact in the field. eHT's commitment to sustainable practices and community engagement positions them as a relevant entity in the environmental engineering industry.


15. Geotech Engineering and Testing


Geotech Engineering and Testing, founded in 1985 and based in Houston, Texas, is a private engineering firm with a workforce of approximately 72 employees. The company specializes in a range of engineering services, including geotechnical, construction materials, geoforensic, and environmental engineering. With a strong emphasis on environmental engineering, Geotech provides vital testing and consulting services that help businesses and organizations in the construction sector ensure compliance with safety regulations. Their expertise extends to various project types, including commercial developments, public infrastructure, and industrial facilities, demonstrating their capability to handle both large and small-scale projects. The firm has successfully completed over 30,000 projects, showcasing their extensive experience and commitment to quality. Geotech is accredited by the American Association for Laboratory Accreditation (A2LA), which reflects their adherence to high standards in their testing and engineering practices. Operating primarily in Texas and neighboring states, Geotech Engineering and Testing continues to play a significant role in the environmental engineering field, contributing to the safety and sustainability of construction practices.


16. GSI Environmental Inc.

  • Website: gsienv.com
  • Ownership type: Private
  • Headquarters: Houston, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1986
  • Headcount: 51-200
  • LinkedIn: groundwater-services-inc

GSI Environmental Inc. is an environmental consulting firm based in Houston, Texas, established in 1986. The company specializes in a wide range of services, including air quality management, aquatic sciences, compliance auditing, and risk assessment. GSI serves various sectors, such as industrial, government, and legal, assisting clients in navigating complex environmental regulations and effectively managing associated risks. With a team of recognized experts in applied environmental research, GSI is committed to providing high-quality technical and regulatory expertise. Their work often involves innovative strategies for environmental risk management, site investigation, and remediation, showcasing their capability to address complex environmental challenges. GSI has also been involved in training programs, such as the Texas Risk Reduction Program, further solidifying their role in the industry.


17. Resource Environmental Solutions LLC

  • Website: res.us
  • Ownership type: Private Equity
  • Headquarters: Bellaire, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: February 2022
  • Founded year: 2007
  • Headcount: 501-1000
  • LinkedIn: resource-environmental-solutions-llc

Resource Environmental Solutions LLC (RES), founded in 2007 and based in Bellaire, Texas, is an ecological restoration company dedicated to restoring ecosystems and promoting environmental sustainability. With a workforce of approximately 641 employees, RES operates across the United States, providing services that help clients comply with environmental regulations and improve their sustainability practices. Their offerings include environmental mitigation, stormwater management, and climate adaptation solutions. RES works with a range of sectors, including transportation, utilities, and renewable energy, showcasing their ability to address various environmental challenges. The company emphasizes a hands-on approach, ensuring that projects are designed to thrive over the long term. Their commitment to ecological restoration is evident in their active involvement in local projects and partnerships aimed at enhancing the health of natural ecosystems.


18. MEP Engineering, Inc.

  • Website: mepengineering.com
  • Ownership type: Private
  • Headquarters: Austin, Texas, United States (USA)
  • Employee distribution: United States (USA) 82%, United Arab Emirates 5%, Brazil 5%, Other 9%
  • Founded year: 1995
  • Headcount: 11-50
  • LinkedIn: mep-engineering-inc.

MEP Engineering, Inc., founded in 1995 and based in Austin, Texas, is a private engineering consulting firm that specializes in mechanical, electrical, and plumbing engineering services. The company serves a variety of sectors, including educational institutions, government entities, and private corporations. MEP Engineering is known for its commitment to energy efficiency and sustainability, which is reflected in its extensive portfolio of projects. The firm has successfully completed numerous projects that prioritize environmentally friendly design, such as schools designed to achieve LEED certification and facilities that incorporate advanced energy-saving technologies. MEP Engineering is also a certified Small Business Enterprise (SBE), which highlights its dedication to providing exceptional service and innovative solutions tailored to the specific needs of its clients. With a team of skilled professionals, MEP Engineering continues to build strong relationships within the industry, ensuring that their projects not only meet but exceed client expectations.


19. Plummer Associates, Inc.

  • Website: plummer.com
  • Ownership type: Private
  • Headquarters: Fort Worth, Texas, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Founded year: 1978
  • Headcount: 51-200
  • LinkedIn: alan-plummer-associates-inc

Plummer Associates, Inc., based in Fort Worth, Texas, is a private engineering firm founded in 1978. The company focuses on intelligent solutions for water and telecommunications challenges, providing a wide array of services that include wastewater treatment, stormwater management, and environmental services. With a team of engineers, scientists, and planners, Plummer is dedicated to improving water quality and preserving the environment. Their clientele primarily consists of municipalities and utility companies, which rely on their expertise to manage water resources and infrastructure effectively. Plummer's innovative approaches, such as the use of constructed wetlands and advanced water treatment technologies, position them as a significant player in the environmental engineering sector.


20. JGC America, Inc.

  • Website: jgcamerica.com
  • Ownership type: Private
  • Headquarters: Houston, Texas, United States (USA)
  • Employee distribution: United States (USA) 93%, Saudi Arabia 7%
  • Founded year: 2013
  • Headcount: 5001-10000
  • LinkedIn: jgc-america-inc

JGC America, Inc., founded in 2013 and based in Houston, Texas, is a private engineering firm that operates under the umbrella of JGC Holdings Corporation. The company focuses on project management, energy transition, and environmental consulting, serving clients across the energy, healthcare, and industrial sectors. JGC America is dedicated to providing innovative solutions to complex engineering challenges, contributing to sustainable development on a global scale. Their services include energy and environmental consulting, with a particular emphasis on technologies that support decarbonization and the hydrogen economy. JGC America is also involved in projects that promote circular economy practices, showcasing their commitment to environmental stewardship. With a workforce primarily located in the United States, the company plays a significant role in advancing sustainable practices within the engineering sector.


21. Terra, A Bowman Company


Terra, A Bowman Company, based in Houston, Texas, is a corporate entity that operates under the umbrella of Bowman Consulting Group Ltd. Founded in 1979, the company has grown to employ between 501 and 1000 individuals, with a strong focus on engineering and consulting services. Their offerings span civil engineering, mechanical, electrical, and plumbing engineering, alongside significant environmental consulting services. Terra's clientele includes various sectors such as construction, transportation, and public infrastructure, which rely on their expertise for project design, management, and compliance. The firm is particularly noted for its work in water resources and environmental projects, showcasing its commitment to sustainable practices and regulatory adherence. Their projects often involve innovative solutions that address both client needs and environmental considerations, reinforcing their role in the environmental engineering sector.


22. Kenall

  • Website: kenallinc.com
  • Ownership type: Corporate
  • Headquarters: Houston, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: May 2017
  • Founded year: 2002
  • Headcount: 11-50
  • LinkedIn: kenall-inc-consulting-engineers

Kenall, Inc., founded in 2002 and based in Houston, Texas, is an engineering and consulting firm that has evolved from a geotechnical and materials testing company into a full-service architectural and engineering firm. With a team of around 21 professionals, Kenall provides a wide range of services, including civil and structural engineering, construction management, and environmental services. They have worked extensively with federal agencies and local governments, focusing on infrastructure development and project management. Their environmental services include stormwater and floodplain management, geotechnical engineering, and environmental assessments, which are crucial for ensuring compliance and sustainability in various projects. Kenall's commitment to quality and responsiveness has earned them a solid reputation in the industry, and they have successfully completed over 2,500 projects for more than 100 clients across Texas and Louisiana.


23. TLC Engineering Inc.

  • Website: tlceng.com
  • Ownership type: Private
  • Headquarters: Houston, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1994
  • Headcount: 11-50
  • LinkedIn: tlc-engineering-inc.

TLC Engineering Inc., based in Houston, Texas, is a private engineering and consulting firm founded in 1994. With a team of licensed engineers and environmental specialists, the company provides a wide array of services, including construction management, environmental services, and disaster management. TLC Engineering is particularly noted for its environmental services, which cover areas such as field investigations, environmental planning, and remediation. They have worked with both public and private sector clients, ensuring compliance with environmental regulations and promoting sustainable practices. The firm operates across multiple states, showcasing its capability to manage projects of varying scales and complexities. Their involvement in significant projects, such as water treatment and stormwater management, highlights their commitment to addressing environmental challenges. TLC Engineering is also recognized for its community-oriented approach, as evidenced by its certifications as a Minority Business Enterprise and a Historically Underutilized Business in Texas.


24. Enviro-Ag Engineering, Inc.

  • Website: enviroag.com
  • Ownership type: Private
  • Headquarters: Amarillo, Texas, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1993
  • Headcount: 11-50
  • LinkedIn: enviro-ag-engineering-inc-

Enviro-Ag Engineering, Inc., based in Amarillo, Texas, is an engineering firm that specializes in environmental consulting and compliance services. Founded in 1993, the company has developed a strong focus on the agricultural sector, providing a range of solutions that include engineering design, permitting, and environmental risk management. With a team of experienced professionals, Enviro-Ag assists clients in navigating complex regulatory landscapes, ensuring compliance with state and federal environmental rules. Their services extend to waste management plans, groundwater remediation, and the development of compliance tools like CafoPro, which streamlines data management for clients in the animal feeding industry. The firm prides itself on its innovative approach and commitment to sustainability, helping clients implement best management practices to enhance regulatory compliance and improve environmental outcomes.


25. SHW Group

  • Website: shwgroup.com
  • Ownership type: Corporate
  • Headquarters: Plano, Texas, United States (USA)
  • Employee distribution: United States (USA) 75%, Pakistan 25%
  • Latest funding: May 2014
  • Founded year: 1945
  • Headcount: 201-500
  • LinkedIn: shw-group

SHW Group is a consulting firm founded in 1945, located in Plano, Texas. The company specializes in a wide array of professional services, including architecture, engineering, and environmental consulting. With a workforce of approximately 112 employees, SHW Group has established itself as a significant player in the industry. The firm is dedicated to sustainable community development and infrastructure projects, catering to both government and private sector clients. Their projects often emphasize environmental stewardship and aim to create resilient communities. Although there is no recent funding reported, the company has maintained a steady presence in the market, focusing on innovative solutions that address contemporary environmental challenges.



Environmental Engineering Insights: Key Companies in Texas


CompanyHeadquarterSizeFoundedOwnership
Trinity ConsultantsDallas, Texas, United States (USA)1001-50001974Private Equity
INTERA IncorporatedAustin, Texas, United States (USA)201-5001974Private
HalffRichardson, Texas, United States (USA)1001-50001950Private
Raba Kistner, Inc.San Antonio, Texas, United States (USA)501-10001968Corporate
Gunda Corporation - An Ardurra CompanyHouston, Texas, United States (USA)51-2002001Corporate
LCA Environmental, Inc.Farmers Branch, Texas, United States (USA)11-501992Private
Baer Engineering & Environmental Consulting, Inc.Austin, Texas, United States (USA)11-501992Private
BGE, Inc.Houston, Texas, United States (USA)1001-50001975Private
Ensolum, LLCDallas, Texas, United States (USA)51-2002018Private
Az&bDallas, Texas, United States (USA)11-501981Private
Poznecki-CamarilloSan Antonio, Texas, United States (USA)51-2001981Family Owned
Ref-ChemOdessa, Texas, United States (USA)501-10001957Private
ParkhillLubbock, Texas, United States (USA)501-10001945Corporate
Enprotec / Hibbs & Todd, Inc. (eHT)Abilene, Texas, United States (USA)51-2001989Private
Geotech Engineering and TestingHouston, Texas, United States (USA)51-2001985Private
GSI Environmental Inc.Houston, Texas, United States (USA)51-2001986Private
Resource Environmental Solutions LLCBellaire, Texas, United States (USA)501-10002007Private Equity
MEP Engineering, Inc.Austin, Texas, United States (USA)11-501995Private
Plummer Associates, Inc.Fort Worth, Texas, United States (USA)51-2001978Private
JGC America, Inc.Houston, Texas, United States (USA)5001-100002013Private
Terra, A Bowman CompanyHouston, Texas, United States (USA)501-10001979Corporate
KenallHouston, Texas, United States (USA)11-502002Corporate
TLC Engineering Inc.Houston, Texas, United States (USA)11-501994Private
Enviro-Ag Engineering, Inc.Amarillo, Texas, United States (USA)11-501993Private
SHW GroupPlano, Texas, United States (USA)201-5001945Corporate


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