In Louisiana, the industry for engineering consulting companies is rich with firms offering a diverse range of expertise. Companies in this sector provide technical & data solutions, environmental consulting, and project management services. Varied in their approach, these companies assist businesses in focusing on their core operations. They deliver critical services ranging from sustainable energy solutions to emergency management. They offer expertise spanning architecture and engineering, environmental health and safety training, and site remediation among other things. This industry sector's trajectory is aligned with the state's growing focus on streamlined operations, sustainable practices, and environmental compliance.


Top 23 engineering consulting companies in Louisiana

1. Aptim

  • Website: aptim.com
  • Headquarters: Baton Rouge, Louisiana, United States
  • Founded: 1889
  • Headcount: 5001-10000
  • LinkedIn

APTIM is a technical and data solutions company that enables businesses to focus on their core operations. They offer sustainable energy solutions, operations and maintenance services, and emergency management expertise. The company adapts its approach based on the specific needs of different industries. APTIM values diversity, equity, and inclusion, and is committed to providing opportunities for its employees. They specialize in services such as architecture and engineering, fuel systems construction and maintenance, and site assessment and remediation.


2. ATC Group Services LLC

ATC Group Services LLC provides integrated environmental consulting and engineering services nationwide. With expertise in air, land, and water, ATC offers comprehensive solutions from consulting to completion. They simplify clients' projects, reduce complexity, and ensure safety and efficiency. Their services include environmental consulting, construction materials testing, subsurface investigations, site remediation, and environmental health and safety training.


3. Recon Management Services INC

ReCon Group is a high-quality engineering consulting firm offering engineering design and project management services to the refining, chemical, power, terminals and pipelines, and pulp and paper industries. With over 500 employees and multiple locations, ReCon executes challenging projects including engineering, procurement, construction, and maintenance (EPCM) projects. They have a strong commitment to delivering a quality product, evidenced by their high customer retention rate and reputation for energy, innovation, and quality.


4. Providence - An Engineering and Environmental Consulting Firm

Providence is an engineering and environmental consulting company that offers services in construction engineering, inspection, transportation, coastal engineering, surveying, permitting, compliance, and support services. They also provide expertise in environmental assessment, air and water quality, solid and hazardous waste management, groundwater evaluation, and site remediation. With a focus on growth, Providence is committed to providing innovative solutions for their clients' needs.


5. T. Baker Smith

  • Website: tbsmith.com
  • Headquarters: Houma, Louisiana, United States
  • Founded: 1913
  • Headcount: 201-500
  • LinkedIn

T. Baker Smith is a civil engineering firm that has been providing quality services to customers for over a century. With precision, integrity, and ingenuity, they offer tailored engineering solutions to a wide range of markets. Their services include engineering, planning, construction, landscape architecture, and project management. They have expertise in pipeline projects, marine positioning, land development, and more. T. Baker Smith is committed to providing superior, integrated, and professional solutions to their clients.


6. Ampirical

  • Website: ampirical.com
  • Headquarters: Covington, Louisiana, United States
  • Founded: 2006
  • Headcount: 201-500
  • LinkedIn

Ampirical Engineering is a leading provider of power solutions with a focus on innovation and creativity. They offer cutting-edge services in 3D design, cybersecurity, EPC, protection & control, and substation engineering.


7. Project Consulting Services

Project Consulting Services (PCS) is a professional services company specializing in energy infrastructure. With over 30 years of experience, PCS offers engineering, project and construction management, procurement, and regulatory expertise to deliver energy solutions. They provide services for onshore and offshore commercial, operational, and specialty projects. PCS leverages their integrity, experience, and agility to solve challenges and ensure successful project outcomes.


8. ECI Group

Advanced Recycling Services is an international technology-led engineering services company that specializes in the design and development of process plants and industrial facilities. They have expertise in biofuels, renewables, and advanced recycling, offering innovative and sustainable solutions. With a focus on polymers, chemicals, and valuable products, they provide a comprehensive range of engineering, procurement, construction, and technical services.


9. Sigma Engineers and Constructors, Inc.

  • Website: sigmaec.com
  • Headquarters: Baton Rouge, Louisiana, United States
  • Founded: 1987
  • Headcount: 51-200
  • Latest funding type: Grant
  • LinkedIn

Sigma Engineering is an engineering consulting company headquartered in Baton Rouge, LA. They offer innovative technology solutions and provide engineering consulting services to over 30 companies, including 8 Fortune 500 companies.


10. Stonewall

Practical Engineering Solutions is an innovative and proven engineering company that offers comprehensive services in mechanical engineering, civil engineering, and technical inspection. We provide accurate and reliable engineering solutions for various industries such as oil and gas, mining, energy, marine, and lithium. Our highly formalized processes guarantee quality designs from conception to completion. Contact us for a quote to get started.


11. Gulf States Engineering Co., Inc.

  • Website: gsengr.com
  • Headquarters: Covington, Louisiana, United States
  • Founded: 1967
  • Headcount: 11-50
  • LinkedIn

Gulf States Engineering is a company that specializes in providing technical expertise to analyze systems and provide effective solutions. They offer aftermarket parts and service to reduce power consumption and minimize downtime during repairs. They ensure consistent environmental compliance and improve mean run time between failures.


12. Quick & Associates, Inc.

Quick Forensics is a forensic engineering firm that provides technical expertise and consulting services to insurance carriers, independent adjusters, and policyholders. They specialize in determining the cause and origin of damage resulting from various perils. With an in-depth understanding of diverse business sectors, Quick Forensics offers comprehensive solutions for claims and dispute resolution. Their team of highly educated and experienced experts specializes in analyzing property damage, fires, accidents, failures, and more. Quick Forensics also offers equipment restoration services.


13. Gregory Consulting and Controls, LLC

  • Website: gregorycc.com
  • Headquarters: Lafayette, Louisiana, United States
  • Founded: 2016
  • Headcount: 11-50
  • LinkedIn

Gregory Consulting and Controls (GCC) is a consulting and engineering company that offers a diverse range of services including instrumentation, controls, and automation. With expertise in various industries such as oil & gas, food & beverage, and power generation, GCC provides excellent service and tailored solutions to meet clients' needs.


14. Design Engineering, Inc.

  • Website: dei-engr.com
  • Headquarters: Metairie, Louisiana, United States
  • Founded: 1984
  • Headcount: 11-50
  • LinkedIn

Design Engineering, Inc. (DEI) is an innovative company that offers full-service project design, development, and management or maintenance for airports wastewater treatment facilities. With over 25 years of experience, DEI provides expertise in civil engineering, software engineering, and construction services. DEI strives to exceed clients' expectations by integrating inspired design with expert economic analysis and technical excellence. They have won multiple awards for their projects, including the Overall Best Project of 2012 from the American Concrete Institute.


15. Julien Engineering-Consulting

Julien Engineering & Consulting, Inc. is a civil/structural engineering firm that provides a variety of services, including permit approvals, conceptual planning, design development, bidding & negotiation, construction administration and representation, and building condition assessments.


16. Hunt Guillot & Associates (HGA)

  • Website: hga-llc.com
  • Headquarters: Ruston, Louisiana, United States
  • Founded: 1997
  • Headcount: 201-500
  • LinkedIn

Hunt, Guillot & Associates (HGA) is a professional services firm offering a range of engineering, project management, and consulting services to various industries. With over 25 years of experience, HGA provides innovative solutions and expertise in areas such as oil and gas, renewable energy, infrastructure, and more.


17. Gallo Mechanical, LLC

Gallomechanical is a company providing innovative solutions in the field of mechanical engineering. They offer a wide range of products and services related to machinery and mechanical systems.


18. The Personnel Consulting Group

  • Website: pcgla.com
  • Headquarters: Metairie, Louisiana, United States
  • Founded: 1969
  • Headcount: 11-50
  • LinkedIn

The Personnel Consulting Group (pcgla.com) is a professional recruiting and staffing agency based in New Orleans. With over 50 years of experience, PCG specializes in direct hire recruiting and contract staffing services for various industries. They prioritize building long-lasting relationships with both clients and candidates, focusing on meeting their needs and changing lives. PCG offers expertise in accounting, finance, administrative, clerical, construction, engineering, technical, human resources, and technology divisions.


19. McHugh Kelly And Associates

Kelly McHugh and Associates is a professional service firm offering land development, surveying, wastewater engineering, and water resources expertise in Mandeville, Louisiana.


20. Bernhard

  • Website: bernhard.com
  • Headquarters: Metairie, Louisiana, United States
  • Founded: 1919
  • Headcount: 1001-5000
  • LinkedIn

Bernhard is a company that delivers innovative solutions to clients' challenges. They bring together a multidisciplinary team with expertise, technology, and techniques to improve communities and the world.


21. CEG Assessments

CEG Assessments is a company in the due diligence industry, providing clients with partnership, project management support, and highly-trained technical talent. They offer customized solutions and have a nationwide footprint, serving as partners on due diligence assessments and site inspections for projects of any size across the United States.


22. Keystone Engineering Inc

Keystone Engineering is a multi-disciplined, multi-location engineering firm that provides engineering and design services and solves problems with a dedicated drive to go further for our clients and our people.


23. Waldemar S. Nelson & Co.

  • Website: wsnelson.com
  • Headquarters: New Orleans, Louisiana, United States
  • Founded: 1945
  • Headcount: 201-500
  • LinkedIn

Waldemar S. Nelson and Company, Inc. is a multi-discipline design and project management consultancy that offers professional services in architecture, engineering, and construction administration. With over 60 years of experience, they specialize in creating complex industrial successes in challenging locations in the U.S. and abroad.


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