Structural engineering companies in Alabama play a vital role in designing, analyzing, and constructing infrastructure that meets safety and functionality standards. These firms range from large consultancies to small specialized shops, offering services like civil, mechanical, and environmental engineering. The industry is adapting to modern demands, incorporating technology for improved efficiency and sustainability. With the increasing focus on resilient infrastructure and smart cities, Alabama's structural engineering sector is poised for growth, fostering community development and responding to emerging challenges in construction and maintenance.

The structural engineering firms listed here vary in size from small teams of just a few employees to larger corporations with thousands on staff. Most of these companies are headquartered in key cities such as Mobile, Montgomery, or Birmingham, reflecting the urban hubs of industry. Founded between the early 1920s and the 2000s, each firm specializes in areas like project management, construction, and environmental design. Their collective expertise supports a wide array of sectors, making contributions to both local and regional development efforts.

Continue reading to learn more about Alabama’s top structural engineering companies.

Top 21 Structural Engineering Companies in Alabama

1. Goodwyn Mills Cawood (GMC)

• Website: gmcnetwork.com
• Ownership type: Private
• Headquarters: Montgomery, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1947
• Headcount: 501-1000
• LinkedIn: goodwyn-mills-and-cawood

Goodwyn Mills Cawood (GMC) is an architecture and engineering firm based in Montgomery, Alabama, founded in 1947. With a workforce of approximately 582 employees, GMC operates across multiple states, including Alabama, Florida, Georgia, Louisiana, North Carolina, South Carolina, and Tennessee. The firm offers a wide array of services, such as engineering, architecture, interior design, and environmental consulting. Their engineering services cover critical areas like water management, transportation, land development, geotechnical, and electrical engineering. GMC serves various sectors, including municipalities, educational institutions, and industries, focusing on infrastructure development and community planning. Their recent accolades, such as being named ENR Southeast 2024 Design Firm of the Year, highlight their commitment to quality and community engagement. GMC's projects range from civic buildings to advanced water treatment facilities, showcasing their capability in handling complex engineering challenges.

2. Volkert, Inc.

• Website: volkert.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1925
• Headcount: 1001-5000
• LinkedIn: volkert-inc.

Volkert, Inc. is a consulting firm based in Mobile, Alabama, specializing in engineering, environmental consulting, program management, and construction services. Established in 1925, the company has built a solid reputation for its commitment to infrastructure development. Volkert serves a wide range of clients, including municipalities and private developers, providing comprehensive solutions for various infrastructure projects. Their engineering services include bridge and structure design, traffic engineering, and water resources management. The firm emphasizes sustainability and regulatory compliance, ensuring that their projects not only meet client needs but also contribute positively to community development. With a workforce of over 1,000 employees, Volkert is well-equipped to handle large-scale projects and has a significant presence in the transportation, energy, and municipal sectors.

3. SS&A Design Collective

• Website: ssainc.com
• Ownership type: Private
• Headquarters: Montgomery, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1946
• Headcount: 51-200
• LinkedIn: sherlock-smith-and-adams

SS&A Design Collective, also known as Sherlock Smith & Adams, Inc., is an architecture-engineering firm based in Montgomery, Alabama. Founded in 1946, the company has built a reputation for providing a wide array of design services, including architecture, civil engineering, and notably, structural engineering. With a workforce of approximately 79 employees, SS&A emphasizes a collaborative approach to project management, ensuring that client needs are met through tailored solutions. The firm has worked on numerous projects across the United States and internationally, particularly in sectors such as healthcare and education, where they deliver innovative and functional designs. Their commitment to quality is reflected in their meticulous attention to detail and their ability to adapt to various project requirements. SS&A is also recognized for its in-house engineering capabilities, which streamline communication and enhance project efficiency.

4. Thompson Engineering

• Website: thompsonengineering.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 98%, Other 2%
• Founded year: 1953
• Headcount: 201-500
• LinkedIn: thompsonengineering

Thompson Engineering, based in Mobile, Alabama, is an engineering firm that has been operational since 1953. The company specializes in a wide array of services, including civil, structural, and environmental engineering, as well as construction management. With a workforce of approximately 383 employees, Thompson Engineering serves a variety of clients, including contractors, developers, and government agencies. Their projects often focus on infrastructure and community development, demonstrating their commitment to enhancing the built environment. The firm is known for its expertise in ensuring compliance with environmental regulations, which is crucial in today's regulatory landscape. Their portfolio includes significant projects such as the renovation of the Homeland Security Building and various transportation and commercial developments. Thompson Engineering's approach combines technical proficiency with a strong emphasis on safety and sustainability, making them a noteworthy player in the engineering sector.

5. PSE Designs

• Website: psedesigns.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2003
• Headcount: 11-50
• LinkedIn: pse-designs

PSE Designs, Inc. is a consulting engineering firm based in Mobile, Alabama, founded in 2003. The company specializes in a range of engineering services, including civil, structural, mechanical, and electrical engineering, as well as project and construction management. PSE Designs primarily serves clients in the commercial and industrial sectors, providing expert guidance and innovative solutions tailored to specific project needs. The firm prides itself on its commitment to client satisfaction and public safety, which has resulted in a high rate of repeat business. With a team of skilled professionals, PSE Designs handles projects of varying scales, from residential inspections to large-scale industrial facilities. Their approach emphasizes collaboration, communication, and integrity, ensuring that they meet the unique demands of each project while maintaining industry standards for quality and safety.

6. T.P. Engineering, Inc.

• Website: tpengineeringinc.com
• Ownership type: Private
• Headquarters: Trussville, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2005
• Headcount: 1-10
• LinkedIn: t.p.-engineering-inc.

T.P. Engineering, Inc. is a structural engineering firm based in Trussville, Alabama, with a secondary location in Conyers, Georgia. Founded in 2005, the company has built a reputation for delivering safe and economical designs through a collaborative approach. With a professional staff boasting over 30 years of experience, T.P. Engineering provides a variety of services including structural design and detailing for commercial and industrial projects, foundation design for pre-engineered buildings, and connection design for fabricators. They also conduct evaluations of existing structures and perform special inspections during construction. Their focus on building strong relationships with clients and stakeholders enhances their ability to meet project needs effectively. T.P. Engineering's expertise positions them as a valuable partner in the design and construction phases of projects, ensuring compliance with industry standards and regulations.

7. Gulf States Engineering, Inc.

• Website: gseeng.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1998
• Headcount: 51-200
• LinkedIn: gse-consulting-engineers

Gulf States Engineering, Inc. is a private engineering firm based in Mobile, Alabama, founded in 1998. With a workforce of approximately 90 employees, the company specializes in a variety of engineering services, including structural, mechanical, electrical, and civil engineering. They cater to multiple industries such as aerospace, manufacturing, and maritime, providing tailored solutions to meet complex engineering challenges. Notable projects include the engineering of the Airbus Final Assembly Line and modifications for NASA's facilities, demonstrating their expertise in high-stakes environments. Gulf States Engineering emphasizes innovation and quality, striving to exceed industry standards and ensure client satisfaction. Their commitment to utilizing advanced technologies, such as 3D scanning and BIM, further enhances their service offerings, positioning them as a relevant player in the engineering sector.

8. MBA Engineers, Inc.

• Website: mbasei.com
• Ownership type: Private
• Headquarters: Birmingham, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1928
• Headcount: 11-50
• LinkedIn: mba-engineers

MBA Engineers, Inc. is a private engineering firm based in Birmingham, Alabama, specializing in civil and structural design services. Founded in 1928, the company has a long-standing reputation in the industry, having successfully completed over 12,500 projects across various sectors. Their client base includes architects, contractors, private owners, and government entities, reflecting their capability to handle a wide range of projects. The firm emphasizes collaboration among its design teams, which enhances communication and efficiency in project execution. With a dedicated staff of experienced engineers, MBA Engineers, Inc. is committed to delivering high-quality designs and construction drawings that meet client needs while maintaining cost-effectiveness. Their services extend to structural forensics, special inspections, civil site design, and municipal utility projects, showcasing their comprehensive approach to engineering solutions.

9. TTL, Inc.

• Website: ttlusa.com
• Ownership type: Private
• Headquarters: Tuscaloosa, Alabama, United States (USA)
• Employee distribution: United States (USA) 99%
• Founded year: 1964
• Headcount: 201-500
• LinkedIn: ttl-usa

TTL, Inc., based in Tuscaloosa, Alabama, is an engineering firm that specializes in integrated infrastructure solutions for a variety of clients, both public and private. Established in 1964, TTL has built a solid reputation in the engineering industry, offering services that include civil, transportation, and geotechnical engineering, as well as environmental consulting. The firm operates primarily across the Southern United States, tackling complex engineering challenges while ensuring compliance with regulatory standards. TTL's commitment to quality and safety is evident in their projects, which often involve innovative problem-solving techniques to address unique site conditions. Their recent entry into the ENR Top 500 Design Firms list at No. 262 reflects their growth and success in the engineering sector, further solidifying their position as a relevant player in the industry.

10. SEI Group, Inc.

• Website: seigroupinc.com
• Ownership type: Private
• Headquarters: Huntsville, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: sei-group-inc

SEI Group, Inc. is a construction and engineering firm based in Huntsville, Alabama, established in 1997. With a workforce of approximately 30 employees, the company specializes in providing sustainable design, construction, and maintenance solutions tailored for both government and commercial clients. Their service offerings include architectural, civil, structural, mechanical, and electrical engineering, as well as facility management and energy solutions. SEI Group has successfully completed over 650 projects globally, demonstrating their operational capacity and expertise. They emphasize a commitment to health and safety, customer satisfaction, and continuous improvement, which are integral to their business model. The firm has also been recognized for its performance, receiving accolades such as the Boeing Performance Excellence Award in 2007. SEI Group operates as a small disadvantaged business and has a bonding capacity of $50 million, allowing them to take on significant projects.

11. Hargrove Engineers & Constructors

• Website: hargrove-epc.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1995
• Headcount: 1001-5000
• LinkedIn: hargrove-engineers-constructors

Hargrove Engineers & Constructors, founded in 1995 and based in Mobile, Alabama, is a private company specializing in engineering and construction solutions. With a workforce of over 1,900 employees, Hargrove offers a comprehensive suite of services, including project management, engineering design, and automation. They cater to various industries, notably manufacturing and oil and gas, emphasizing operational efficiency and safety. Their engineering design capabilities include civil, electrical, mechanical, and structural engineering, showcasing their commitment to providing tailored solutions for complex projects. Hargrove operates 19 full-service offices across the United States, serving over 2,100 client facilities. Their focus on innovation and quality has positioned them as a significant player in the engineering sector, particularly in structural engineering projects.

12. HCS Engineering Company, Inc

• Website: hcseng.com
• Ownership type: Private
• Headquarters: Decatur, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1992
• Headcount: 11-50
• LinkedIn: hcs-engineering-company

HCS Engineering Company, Inc., based in Decatur, Alabama, has been a significant player in the engineering sector since its founding in 1992. The firm specializes in mechanical, electrical, instrumentation, and civil/structural engineering, catering primarily to industrial clients across various sectors, including automotive and chemical manufacturing. HCS Engineering prides itself on delivering high-quality, cost-effective solutions that enhance operational efficiency and safety for its clients. The company has successfully completed numerous projects, demonstrating its capability in project management, construction management, and process design. With a team of experienced professionals, including licensed engineers, HCS Engineering has established a solid reputation for reliability and excellence in service. The recent merger with Salas O’Brien, effective March 2024, is expected to expand their expertise and service reach, further solidifying their position in the industry.

13. Alliance Engineering

• Website: allianceengr.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2017
• Headcount: 11-50
• LinkedIn: alliance-engineering-llc

Alliance Engineering, based in Mobile, Alabama, is a private engineering and construction management firm founded in 2017. The company specializes in mechanical, electrical, and structural engineering, providing comprehensive solutions to clients across various industries, including pulp and paper, food and beverage, and specialty chemicals. With a team of experienced professionals, Alliance Engineering emphasizes project efficiency and safety, ensuring that each project meets high standards of quality and compliance. Their structural engineering services include the design of steel framing, deep foundations, and marine structures, showcasing their expertise in the field. The firm operates multiple offices across the southeastern United States, allowing them to serve a broad client base effectively. Alliance Engineering is committed to maintaining strong relationships with clients, focusing on responsiveness and timely project completion.

14. Project Design Group Inc.

• Website: pdgeng.com
• Ownership type: Private
• Headquarters: Mobile, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2003
• Headcount: 11-50
• LinkedIn: project-design-group-inc.

Project Design Group Inc. (PDG), founded in 2003 and based in Mobile, Alabama, is an engineering firm that specializes in project management and consulting services across several industries, including pulp and paper, petrochemical, and power. With a team of professionals averaging over 25 years of experience, PDG is committed to delivering efficient, safe, and cost-effective solutions to industrial manufacturers. Their services include civil and structural engineering, mechanical, piping, electrical instrumentation, and project management. PDG has a proven track record of assisting clients through all phases of their projects, from initial studies and scoping to detailed design and construction quality assurance. The firm prides itself on its commitment to safety, responsiveness, and client-focused solutions, which have fostered long-term relationships with repeat clientele.

15. Key Engineering, Inc.

• Website: key-eng.com
• Ownership type: Private
• Headquarters: Decatur, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2003
• Headcount: 11-50
• LinkedIn: key-engineering-inc-

Key Engineering, Inc. is a private engineering firm based in Decatur, Alabama, established in 2003. The company offers a range of engineering and design services, with a specialization in electrical, mechanical, and structural engineering. They serve a variety of clients across industrial, commercial, municipal, and private sectors. Key Engineering prides itself on its attention to detail and commitment to delivering projects on time and within budget. The firm is staffed by qualified engineers and designers, many of whom hold professional engineering licenses. Their structural engineering services include steel and concrete design, building framing design, and foundation evaluations. With a focus on innovative solutions, Key Engineering has built a reputation for reliability and expertise in the engineering field, particularly in the North Alabama region.

16. Poly, Inc.

• Website: poly-inc.com
• Ownership type: Private
• Headquarters: Dothan, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1959
• Headcount: 51-200
• LinkedIn: poly-inc

Poly, Inc., established in 1959, is an engineering and architecture firm based in Dothan, Alabama. The company has built a reputation for providing a wide range of services, including architectural design, engineering solutions, environmental consulting, and federal services. With a workforce of approximately 51-200 employees, Poly, Inc. serves municipal clients and government agencies, focusing on delivering projects that meet specific regulatory requirements. Their portfolio includes notable projects such as the design of military training ranges, water infrastructure improvements, and community development initiatives. The firm emphasizes sustainability in its designs, adhering to energy-efficient practices and regulatory compliance. Poly, Inc. has maintained long-standing relationships with clients, showcasing their commitment to quality and client satisfaction.

17. Covenant Steel

• Website: covenantsteel.com
• Ownership type: Private
• Headquarters: Dothan, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 11-50
• LinkedIn: covenant-steel

Covenant Steel Warehouse, Inc., based in Dothan, Alabama, is a construction and manufacturing firm that has been operational since 1996. The company specializes in the design and fabrication of structural and pre-engineered steel buildings, catering to various sectors such as aviation, manufacturing, and public facilities. Covenant Steel offers a comprehensive suite of services that includes engineering, detailing, fabrication, and erection of steel structures. Over the years, they have completed numerous notable projects, including large industrial facilities and aircraft hangars, demonstrating their expertise in handling complex steel construction. The company is AISC certified, which reflects their adherence to high standards in steel building structures. With a workforce of 37 employees, Covenant Steel continues to play a significant role in the steel construction industry, providing tailored solutions to meet the specific needs of their clients.

18. Proximus Engineering PC

• Website: proximuseng.com
• Ownership type: Private
• Headquarters: Dothan, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2012
• Headcount: 11-50
• LinkedIn: proximus-engineering-pc

Proximus Engineering PC, based in Dothan, Alabama, is a private engineering firm founded in 2012. The company specializes in electrical, mechanical, and structural engineering services, providing a comprehensive suite of solutions that includes design, construction coordination, and forensic investigation. Proximus Engineering has developed a strong presence in the industry, serving clients across the United States. Their expertise in structural engineering covers a range of materials, including steel, wood, concrete, and masonry. The firm employs advanced computer modeling and analysis techniques to ensure the safety and effectiveness of their designs. Proximus Engineering has collaborated with various companies, including Georgia-Pacific and Kimberly-Clark, showcasing their ability to manage complex engineering projects. They are committed to fostering long-term relationships with clients and delivering quality service tailored to meet specific project needs.

19. Linc Research, Inc.

• Website: lincresearchinc.com
• Ownership type: Private
• Headquarters: Huntsville, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2012
• Headcount: 11-50
• LinkedIn: lincresearchinc

Linc Research, Inc., based in Huntsville, Alabama, is an engineering firm founded in 2012. The company specializes in innovative technology solutions, particularly in vibration mitigation and structural engineering. They have a strong focus on serving federal agencies and commercial clients, with notable collaborations with NASA and the Department of Defense. Linc Research is recognized for its expertise in developing advanced engineering solutions, including the Disruptive Tuned Mass System for vibration control. Their team consists of skilled professionals with multiple degrees across various engineering disciplines, ensuring high-quality outcomes in their projects. The company has successfully completed over 100 projects, demonstrating a solid track record in the engineering sector.

20. AJM United

• Website: ajmunited.com.au
• Ownership type: Private
• Headquarters: Auburn, Alabama, United States (USA)
• Employee distribution: Australia 100%
• Founded year: 2000
• Headcount: 11-50
• LinkedIn: ajm-united

AJM United, established in 1991, is an engineering and construction firm based in Auburn, Alabama, specializing in tailored solutions for various sectors, including water treatment, mining, and infrastructure. With a team of specialists that includes engineers, designers, and project managers, AJM United has successfully executed numerous projects, such as the Riverstone Wastewater Treatment Plant and the Western Sydney Stadium. Their services range from project management and asset maintenance to custom fabrications, demonstrating their comprehensive approach to engineering challenges. The company prides itself on its commitment to safety, quality, and reliability, ensuring that projects are completed on time and to the highest standards. AJM United has built a strong reputation in the industry, serving clients in critical sectors like water, power, and rail, and continues to focus on innovation and excellence in every project.

21. GW Systems

• Website: gwsys.net
• Ownership type: Private
• Headquarters: Birmingham, Alabama, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1983
• Headcount: 51-200
• LinkedIn: gwsystems

GW Systems, founded in 1983 and based in Birmingham, Alabama, is a private engineering and construction firm that specializes in heavy industrial projects. The company offers a comprehensive suite of services, including engineering, manufacturing, project management, and field services. They cater to various industries such as lime, chemical products, and aggregates, providing customized solutions that prioritize safety, quality, and timely project completion. With a strong emphasis on structural design, GW Systems employs advanced technologies like 3D modeling to enhance project accuracy and efficiency. Their in-house manufacturing capabilities allow them to maintain high standards of quality control throughout the fabrication process. Over the years, GW Systems has evolved from a construction-focused entity to a recognized provider of design-build solutions, demonstrating a commitment to innovation and customer satisfaction.

Structural Engineering Insights: Key Companies in Alabama

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