Environmental consulting companies in Louisiana specialize in addressing ecological challenges while ensuring compliance with regulations. These firms provide various services, such as environmental impact assessments, resource management, site remediation, and regulatory guidance. Increased state and federal regulations are pushing growth in this sector, prompting firms to adopt innovative solutions that tackle emerging environmental issues. Furthermore, Louisiana’s unique geographical features, like its coastlines and wetlands, yield opportunities for specialized consulting in restoration and conservation projects. The industry is evolving with a focus on sustainability, impacting both local businesses and communities as they adapt to climate challenges.


The companies in this list represent a mix of sizes, from larger firms like Aptim to smaller entities like Jesco Environmental. Most are headquartered in Baton Rouge, with various specializations in engineering, permitting, and coastal restoration. Established in different decades, these firms have adapted to the evolving environmental landscape, offering valuable expertise and services. Some firms, like Jesco and G.E.C., provide innovative solutions tailored to local needs, while larger companies typically tackle broader scopes involving government and private sector clients. This research highlights nearly three dozen years of overall operational experience within the state.


Continue reading to discover Louisiana's top environmental consulting companies.


Top 20 Environmental Consulting Companies in Louisiana


1. Aptim

  • Website: aptim.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 70%, Peru 21%, Canada 7%, Other 2%
  • Founded year: 2017
  • Headcount: 1001-5000
  • LinkedIn: aptim.com

Aptim, founded in 2017 and headquartered in Baton Rouge, Louisiana, is a consulting firm that specializes in environmental, sustainability, resilience, and infrastructure solutions. With a workforce of nearly 3,000 employees, Aptim provides integrated services to a range of clients, including government agencies, commercial and industrial sectors, and energy customers. The company addresses complex challenges in sustainability and resource management, offering services such as environmental compliance, remediation, and ESG consulting. Aptim has also been recognized for its commitment to safety and quality, consistently ranking among the top firms in environmental and construction sectors. Their focus on energy transition, nuclear decommissioning, and waste minimization reflects their proactive approach to current environmental issues, making them a relevant player in the consulting industry.


2. Providence - An Engineering and Environmental Consulting Firm

  • Website: providenceeng.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 94%, India 2%, Other 4%
  • Founded year: 2000
  • Headcount: 51-200
  • LinkedIn: providence

Providence - An Engineering and Environmental Consulting Firm, established in 2000 and based in Baton Rouge, Louisiana, specializes in engineering and environmental consulting services. The firm provides a wide array of services, including construction engineering, environmental compliance, and technology solutions. Their expertise spans various areas such as permitting, impact assessments, air and water quality management, and solid waste management. Providence serves a mix of government agencies and private sector clients, focusing on infrastructure projects and regulatory adherence. The firm has recently expanded its service offerings to include cultural resource management, enhancing its capabilities in regulatory compliance. With a workforce of 51-200 employees, Providence is committed to delivering high-quality services that positively impact both the environment and the communities they serve.


3. CK Associates Environmental Consultants

  • Website: c-ka.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1981
  • Headcount: 51-200
  • LinkedIn: c-k-associates-llc

CK Associates Environmental Consultants, founded in 1981 and based in Baton Rouge, Louisiana, is an employee-owned environmental consulting firm. The company specializes in providing a wide array of services, including air, water, and waste permitting, compliance support, ecological investigations, and risk assessment. With a dedicated team of professionals, CK Associates serves clients primarily in the oil and gas, manufacturing, and power industries, helping them navigate complex environmental regulations. The firm has built a solid reputation for its quality of work and commitment to client satisfaction. CK Associates has multiple offices across Louisiana and Texas, allowing them to effectively address regional environmental challenges. Their focus on professional development and safety ensures that they attract and retain skilled personnel, which is crucial for maintaining high standards in environmental consulting.


4. T. Baker Smith

  • Website: tbsmith.com
  • Ownership type: Family Owned
  • Headquarters: Houma, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1913
  • Headcount: 201-500
  • LinkedIn: t--baker-smith

T. Baker Smith, founded in 1913 and based in Houma, Louisiana, is a family-owned consulting firm that specializes in engineering, environmental, and surveying services. With a workforce of approximately 284 employees, the company has built a reputation for delivering innovative solutions across various sectors, including energy and government. T. Baker Smith emphasizes community impact and sustainability, integrating these principles into their operations. Their environmental services focus on regulatory compliance and natural science, ensuring that clients meet necessary standards while promoting ecological health. The firm has a rich history of over a century, marked by a commitment to quality and excellence, and continues to evolve by adopting cutting-edge technologies to enhance project outcomes. Their project portfolio includes significant initiatives such as flood control structures and coastal restoration efforts, showcasing their active involvement in addressing environmental challenges.


5. Csrs

  • Website: csrsinc.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 96%, Canada 4%
  • Founded year: 1978
  • Headcount: 51-200
  • LinkedIn: csrs

CSRS, founded in 1978 and based in Baton Rouge, Louisiana, is a private consulting firm specializing in civil engineering, disaster recovery, and environmental planning. With a workforce of approximately 431 employees, CSRS provides services to both government agencies and private organizations. Their mission is to support the development of sustainable infrastructure and navigate complex regulatory environments. The firm is particularly noted for its work in environmental planning, where it offers services such as site investigation, risk assessment, and compliance with environmental regulations. CSRS has a strong focus on community resilience and economic development, helping clients manage environmental risks while enhancing property value. Their team includes experienced professionals in various environmental disciplines, enabling them to effectively address the challenges faced by their clients in the environmental sector.


6. G.E.C., Inc. (GEC)

  • Website: gecinc.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 97%, Brazil 3%
  • Founded year: 1986
  • Headcount: 201-500
  • LinkedIn: gec-inc

G.E.C., Inc. (GEC), established in 1986 and based in Baton Rouge, Louisiana, is a private engineering and consulting firm that provides a wide range of project planning, design, and implementation services. With a workforce of approximately 176 employees, GEC serves both public and private clients across the United States. The firm has built a strong reputation for delivering high-quality services on time and within budget. GEC's expertise spans several areas, including civil and structural engineering, electrical engineering, and notably, environmental consulting. Their focus on green infrastructure designs and sustainable practices demonstrates their commitment to addressing environmental challenges. GEC has been involved in significant projects such as the Mid-Barataria Sediment Diversion Project and various coastal restoration initiatives, showcasing their capability in managing complex environmental issues. The firm has received multiple awards for its innovative management and project execution, further establishing its presence in the engineering and environmental consulting sectors.


7. Waldemar S. Nelson & Co., Inc.

  • Website: wsnelson.com
  • Ownership type: Private
  • Headquarters: New Orleans, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1945
  • Headcount: 201-500
  • LinkedIn: waldemar-s-nelson-co-

Waldemar S. Nelson & Co., Inc. is an engineering consultancy based in New Orleans, Louisiana, with a history dating back to 1945. The firm specializes in civil, chemical, and environmental engineering, along with project management and architectural services. They serve a wide range of clients, including industrial, commercial, and governmental sectors. Their environmental engineering team is particularly focused on helping clients navigate complex regulatory landscapes, ensuring compliance while also promoting sustainable practices. The company has undertaken numerous projects that involve permitting, risk-based corrective actions, and the design of containment systems. Their commitment to environmental stewardship is evident in their work on wetland restoration and wastewater treatment facilities, showcasing their capability to address pressing environmental challenges. With a workforce of over 200 professionals, Waldemar S. Nelson & Co. continues to play a significant role in the engineering and environmental consulting industries.


8. Jesco Environmental & Geotechnical Services, Inc.


Jesco Environmental & Geotechnical Services, Inc., based in Jennings, Louisiana, has been active in the environmental consulting and engineering sector since its inception in 1994. The company specializes in a range of services, including environmental management, infrastructure development, and disaster response. With a team of approximately 22 employees, Jesco has built a reputation for delivering quality results through a multi-disciplinary approach. They cater to a variety of clients, including federal, state, and local government agencies, as well as private enterprises. Jesco's services include environmental site assessments, geospatial data analysis, and compliance with environmental regulations. Their involvement in disaster response, particularly in the aftermath of hurricanes and wildfires, showcases their capability to address urgent environmental challenges. Jesco's commitment to innovative solutions and community-focused projects positions them as a relevant player in the environmental consulting industry.


9. Gulf South Research Corporation

  • Website: gsrcorp.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1993
  • Headcount: 11-50
  • LinkedIn: gsrcorp

Gulf South Research Corporation (GSRC), founded in 1993 and based in Baton Rouge, Louisiana, is a private environmental consulting firm. With a workforce of approximately 40 employees, GSRC offers a range of services that include National Environmental Policy Act (NEPA) studies, ecological restoration, and Geographic Information Systems (GIS) services. The company serves a mix of government and corporate clients, showcasing its ability to navigate the complexities of environmental compliance and resource management. GSRC has worked on projects across the United States, demonstrating its capability to handle diverse environmental challenges. The firm has established a reputation for high-quality consulting services, as evidenced by its repeat clientele and successful project completions. GSRC's commitment to environmental stewardship is reflected in its ecological restoration projects, which often involve sensitive ecosystems and endangered species. The company is also recognized for its growth and workplace culture, having been named one of the 2021 Best Places to Work in Baton Rouge.


10. Leaaf Environmental, LLC

  • Website: leaaf.com
  • Ownership type: Private
  • Headquarters: Gretna, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2005
  • Headcount: 11-50
  • LinkedIn: leaaf-environmental-llc

Leaaf Environmental, LLC, based in Gretna, Louisiana, is an environmental consulting firm that has been operational since 2005. With a team of 24 professionals, the company specializes in a range of services including environmental site assessments, remediation, and compliance support. Their clientele spans various sectors such as construction, healthcare, and light industrial, reflecting their adaptability to different industry needs. Leaaf is particularly recognized for its work in brownfields redevelopment, helping communities navigate the complexities of environmental cleanup and site reuse. The firm also offers training programs for certifications related to environmental quality, further demonstrating their commitment to industry standards and education. Their focus on minimizing environmental risks positions them as a relevant player in the environmental consulting field.


11. Delta Coast Consultants

  • Website: deltacoastllc.com
  • Ownership type: Private
  • Headquarters: Houma, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2014
  • Headcount: 11-50
  • LinkedIn: delta-coast-consultants

Delta Coast Consultants, founded in 2014 and based in Houma, Louisiana, is a private engineering and consulting firm with a workforce of 26 employees. The company specializes in engineering, surveying, environmental analysis, and land use planning. They serve both businesses and government entities, assisting them in navigating complex regulatory requirements and executing projects efficiently. Delta Coast Consultants has a strong focus on coastal restoration and infrastructure development, which is particularly relevant given Louisiana's unique environmental challenges. Their portfolio includes significant projects like the Morganza to the Gulf Hurricane Protection Project, showcasing their commitment to enhancing coastal resilience and managing flood risks. The firm employs advanced technologies in their surveying and mapping services, ensuring precision in data collection and analysis. Their multidisciplinary team is dedicated to delivering integrated solutions that meet environmental standards and support sustainable development.


12. Qri

  • Website: qri.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1986
  • Headcount: 51-200
  • LinkedIn: quaternary-resource-investigations-llc

Quaternary Resource Investigations, LLC (Qri), based in Baton Rouge, Louisiana, is an environmental consulting firm founded in 1986. With a workforce of approximately 51-200 employees, Qri specializes in a variety of services including environmental consulting, drilling, geophysical assessments, remediation, and emergency response. The company serves a broad spectrum of clients, including federal agencies and private sector companies, particularly in the petrochemical and oil and gas industries. Qri has developed proprietary technologies, such as HTAS™ and Pulser™, enhancing their service delivery. Over the years, they have successfully managed numerous contracts, demonstrating their ability to respond effectively to environmental challenges and disasters. Their mission emphasizes a commitment to preserving the environment while ensuring compliance and safety for their clients. Qri's proactive approach to disaster recovery and environmental protection positions them as a significant player in the environmental consulting field.


13. SEMS, Inc.

  • Website: semsinc.net
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 91%, Pakistan 4%, Nigeria 4%
  • Founded year: 1992
  • Headcount: 51-200
  • LinkedIn: sems-inc-

SEMS, Inc., based in Baton Rouge, Louisiana, is an environmental consulting firm that has been operational since 1992. With a workforce of approximately 67 employees, the company specializes in a variety of services, including environmental consulting, remediation, industrial hygiene, and demolition. SEMS serves clients across multiple states, with offices in Baton Rouge, Jackson, Mandeville, Memphis, Nashville, Shreveport, and Tyler. The firm is particularly focused on helping businesses navigate the complexities of environmental compliance in highly regulated sectors. Their team consists of experienced professionals, including engineers and scientists, who are well-versed in addressing intricate environmental issues. SEMS has participated in notable projects, such as the cleanup following the Deepwater Horizon disaster, showcasing their capability to handle large-scale environmental challenges. Their emphasis on safety and quality service has earned them a reputation for reliability in the industry.


14. Trigon Associates, LLC (ED WOSB)

  • Website: trigonassociates.com
  • Ownership type: Private
  • Headquarters: New Orleans, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 83%, Jordan 9%, Haiti 9%
  • Founded year: 2009
  • Headcount: 11-50
  • LinkedIn: trigon-associates-llc_310833

Trigon Associates, LLC is an engineering and consulting firm based in New Orleans, Louisiana, established in 2009. The company specializes in a range of services, including planning, engineering design, project management, and environmental remediation. With a workforce of 11-50 employees, Trigon serves municipal governments and federal agencies, focusing on infrastructure and disaster recovery needs. Their expertise in environmental assessments and remediation positions them as a key player in the environmental consulting sector. Trigon holds various licenses across several states, including Louisiana, Texas, and Florida, and is recognized as an Economically Disadvantaged Woman Owned Small Business (EDWOSB). The firm has been involved in notable projects, such as the USAID Vietnam Dioxin Remediation Project, which underscores their capability in handling complex environmental challenges. Their commitment to quality and client service is reflected in their numerous awards and recognitions, including being named one of the best firms to work for in their industry.


15. Michael Pisani & Associates, Inc., an ERM Group company


Michael Pisani & Associates, Inc., an ERM Group company, is a consulting firm based in Metairie, Louisiana, specializing in sustainability solutions. Founded in 1995, the company has built a reputation for assisting businesses and organizations in navigating the intricate challenges of sustainability. Their services include compliance with environmental regulations, strategies for decarbonization, and fostering environmental stewardship. As part of the ERM Group, they leverage a global network of expertise to provide tailored solutions across various industries. Their focus on helping clients achieve sustainability goals positions them as a significant contributor to the environmental consulting field.


16. Eagle Environmental Services, Inc.

  • Website: eaglered.com
  • Ownership type: Private
  • Headquarters: Baton Rouge, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1998
  • Headcount: 11-50
  • LinkedIn: eagle-environmental-services-inc-

Eagle Environmental Services, Inc., based in Baton Rouge, Louisiana, is an environmental consulting firm that has been operational since 1998. The company specializes in a wide array of services, including air quality management, water consulting, waste permitting, and environmental site assessments. With a dedicated team of professionals, Eagle Environmental caters primarily to clients in the chemical, petrochemical, and oil and gas industries, helping them navigate the complexities of regulatory compliance and environmental responsibilities. The firm prides itself on its ability to provide tailored solutions that meet the specific needs of its clients, ensuring that projects proceed smoothly and efficiently. Their expertise extends to conducting comprehensive audits, corrective actions, and environmental assessments, which are critical for maintaining compliance with federal and state regulations. Eagle Environmental's commitment to client service and satisfaction is evident in their approach, which emphasizes building lasting relationships and providing consistent support throughout the project lifecycle.


17. Goodwin & Associates, Inc.


Goodwin & Associates, Inc., founded in 1981 and based in New Orleans, Louisiana, is a consulting firm that specializes in cultural resources management and historic preservation. With a workforce of approximately 101 employees, the company has built a reputation for providing a wide range of services, including terrestrial and maritime archaeology, environmental permitting, and disaster response. Their clientele includes government agencies and private developers who require compliance with preservation laws and regulations. Goodwin & Associates operates across various sectors, such as energy, military support, and transportation, ensuring that projects meet both legal and environmental standards. Notably, they have been involved in significant projects related to climate change and resiliency, working with agencies like Louisiana’s Coastal Protection and Restoration Agency to address the impacts of climate change on cultural resources. Their extensive experience and commitment to preserving cultural heritage while addressing environmental challenges make them a notable entity in the consulting industry.


18. Fenstermaker

  • Website: fenstermaker.com
  • Ownership type: Family Owned
  • Headquarters: Lafayette, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1950
  • Headcount: 201-500
  • LinkedIn: fenstermaker

C. H. Fenstermaker & Associates, L.L.C., established in 1950, is a family-owned consulting firm based in Lafayette, Louisiana. The company specializes in surveying, engineering, and environmental consulting services. With a workforce of approximately 251 employees, Fenstermaker has built a reputation for assisting clients across various sectors, including oil and gas, transportation, and municipal services. Their environmental consulting services include permitting, environmental documentation, NEPA assessments, and natural resources management. This breadth of expertise allows them to navigate complex regulatory landscapes and support clients in achieving compliance. Fenstermaker's commitment to customer service and their extensive experience in the industry position them as a notable player in the environmental consulting field.


19. Blue Ox Enterprises, LLC


Blue Ox Enterprises, LLC, based in Lafayette, Louisiana, is a private consulting firm founded in 2008. The company specializes in regulatory compliance and environmental management, offering a range of services that include compliance management, environmental assessments, and risk management. Blue Ox primarily serves clients in the oil and gas sector, as well as construction and commercial development. Their team of experts assists clients in navigating the complexities of environmental regulations, ensuring that they meet legal and ethical obligations while minimizing risks. The firm emphasizes personalized service and affordable pricing, aiming to provide clients with a competitive edge in compliance management. Blue Ox's consultants are equipped to handle various environmental challenges, from due diligence assessments to onsite safety support, making them a significant contributor to the environmental consulting industry.


20. Elos

  • Website: elosenv.com
  • Ownership type: Corporate
  • Headquarters: Hammond, Louisiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: October 2023
  • Founded year: 2006
  • Headcount: 11-50
  • LinkedIn: elos-environmental-llc

Elos, based in Hammond, Louisiana, is an environmental consulting firm that has been providing expert guidance since its inception in 2006. The company specializes in a variety of services, including environmental compliance, coastal restoration, and innovative technologies. Elos serves a mix of private businesses and government entities, helping them navigate the complexities of environmental regulations and project management. Their expertise spans several critical areas, such as NEPA compliance, environmental impact analysis, and soil and groundwater investigations. Elos is also involved in coastal resilience planning and ecosystem restoration, reflecting their commitment to addressing pressing environmental issues. With a team of trained professionals, Elos is well-equipped to support clients in achieving their environmental goals while ensuring compliance with regulatory requirements.



Environmental Consulting Insights: Key Companies in Louisiana


CompanyHeadquarterSizeFoundedOwnership
AptimBaton Rouge, Louisiana, United States (USA)1001-50002017Private
Providence - An Engineering and Environmental Consulting FirmBaton Rouge, Louisiana, United States (USA)51-2002000Private
CK Associates Environmental ConsultantsBaton Rouge, Louisiana, United States (USA)51-2001981Private
T. Baker SmithHouma, Louisiana, United States (USA)201-5001913Family Owned
CsrsBaton Rouge, Louisiana, United States (USA)51-2001978Private
G.E.C., Inc. (GEC)Baton Rouge, Louisiana, United States (USA)201-5001986Private
Waldemar S. Nelson & Co., Inc.New Orleans, Louisiana, United States (USA)201-5001945Private
Jesco Environmental & Geotechnical Services, Inc.Jennings, Louisiana, United States (USA)11-501994Private
Gulf South Research CorporationBaton Rouge, Louisiana, United States (USA)11-501993Private
Leaaf Environmental, LLCGretna, Louisiana, United States (USA)11-502005Private
Delta Coast ConsultantsHouma, Louisiana, United States (USA)11-502014Private
QriBaton Rouge, Louisiana, United States (USA)51-2001986Private
SEMS, Inc.Baton Rouge, Louisiana, United States (USA)51-2001992Private
Trigon Associates, LLC (ED WOSB)New Orleans, Louisiana, United States (USA)11-502009Private
Michael Pisani & Associates, Inc., an ERM Group companyMetairie, Louisiana, United States (USA)11-501995Corporate
Eagle Environmental Services, Inc.Baton Rouge, Louisiana, United States (USA)11-501998Private
Goodwin & Associates, Inc.New Orleans, Louisiana, United States (USA)51-2001981Private
FenstermakerLafayette, Louisiana, United States (USA)201-5001950Family Owned
Blue Ox Enterprises, LLCLafayette, Louisiana, United States (USA)1-102008Private
ElosHammond, Louisiana, United States (USA)11-502006Corporate


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