Structural engineering companies in Connecticut play a critical role in designing and analyzing structures to ensure safety and functionality. They specialize in a range of services including new construction, rehabilitation, and inspection tailored to various sectors such as healthcare, education, and transportation. As sustainability becomes a priority, firms are increasingly integrating eco-friendly practices into their projects. The push for greener structures and modernization of aging infrastructure indicates that the industry is evolving toward innovative solutions, driven by technology and a focus on community impact.


This list features 20 structural engineering companies based in Connecticut, varying in size from smaller firms to larger corporations. Founded between 1924 and 2002, these firms are strategically positioned in cities like Danbury, Meriden, and New London. They offer specialized services in structural engineering, construction management, and environmental consulting. Each company has carved out a niche—be it through innovative designs, technical expertise, or community-focused projects, highlighting their commitment to enhancing the built environment.


Read on to discover the top structural engineering companies in Connecticut.


Top 20 Structural Engineering Companies in Connecticut


1. The Di Salvo Engineering Group, Structural Engineers, Inc.


The Di Salvo Engineering Group, Structural Engineers, Inc. (TDEG) is a professional engineering corporation based in Danbury, Connecticut, with a branch office in Castle Rock, Colorado. Established in 1973, TDEG specializes in providing comprehensive structural engineering services. The firm is known for its innovative solutions in new construction, adaptive reuse, and structural investigations. They serve a variety of sectors, including education, healthcare, and commercial development. TDEG prides itself on technical excellence and customer satisfaction, which has earned them awards from organizations such as the American Institute of Architects and the American Council of Engineering Companies/Connecticut. The company is also actively involved in community service, showcasing their commitment to social responsibility. With a team of registered Professional Engineers and designers, TDEG continues to contribute to the structural engineering industry with a focus on quality and integrity.


2. Russell and Dawson Inc

  • Website: rdaep.com
  • Ownership type: Private
  • Headquarters: East Hartford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 67%, India 33%
  • Founded year: 1965
  • Headcount: 11-50
  • LinkedIn: rdaepct

Russell and Dawson Inc. is an architecture and engineering firm based in East Hartford, Connecticut, founded in 1965. With a workforce of approximately 33 employees, the company has built a solid reputation in the New England region, completing over 10,000 projects across various sectors, including healthcare, commercial, and residential. Their service offerings include architectural design, mechanical, electrical, plumbing, and structural engineering. The firm emphasizes collaboration and client satisfaction, ensuring that projects are managed effectively from conception to completion. They have also engaged in community projects, providing pro bono services to local organizations, which highlights their commitment to social responsibility. Russell and Dawson Inc. is recognized for its technical expertise and creative solutions, making it a significant player in the architecture and engineering industry.


3. Loureiro Engineering Associates, Inc.

  • Website: loureiro.com
  • Ownership type: Private
  • Headquarters: Plainville, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1975
  • Headcount: 51-200
  • LinkedIn: loureiro-engineering

Loureiro Engineering Associates, Inc. is a private engineering and construction firm based in Plainville, Connecticut, founded in 1975. The company specializes in providing integrated services that include engineering, environmental consulting, and construction. With a workforce of approximately 166 employees, Loureiro has established itself as a reliable partner for clients in various sectors, particularly in industrial and government projects. Their approach emphasizes seamless project delivery, ensuring that clients have a single point of accountability throughout the project lifecycle. Loureiro's commitment to exceptional client experiences is reflected in their high rate of repeat business, with 95% of their work stemming from existing clients or referrals. The firm operates under an employee stock ownership plan (ESOP), which fosters a culture of ownership and accountability among its staff. This structure not only enhances service quality but also aligns the interests of employees with those of clients, promoting a collaborative environment focused on achieving project goals.


4. BL Companies

  • Website: blcompanies.com
  • Ownership type: Private
  • Headquarters: Meriden, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1986
  • Headcount: 201-500
  • LinkedIn: bl-companies

BL Companies, founded in 1986 and based in Meriden, Connecticut, is a private architecture and engineering firm that offers a range of integrated services. The company specializes in architecture, civil engineering, environmental consulting, land surveying, and notably, structural engineering. With a workforce of approximately 489 employees, BL Companies emphasizes collaboration and employee ownership, which fosters a strong commitment to client satisfaction. They serve a variety of markets, including commercial, healthcare, education, and public infrastructure, showcasing their adaptability and expertise across different project types. Their approach combines technical proficiency with a focus on sustainable practices, ensuring that their projects not only meet client needs but also contribute positively to the community. BL Companies has been recognized in the industry, consistently appearing in lists of top design firms, which reflects their ongoing relevance and activity in the engineering sector.


5. e2 engineers

  • Website: e2engineers.com
  • Ownership type: Private
  • Headquarters: New London, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2002
  • Headcount: 11-50
  • LinkedIn: e2engineers

e2 engineers is a structural engineering consulting firm based in New London, Connecticut, founded in 2002. The company specializes in providing comprehensive engineering services across various building sectors, assisting clients in understanding, designing, and constructing projects while ensuring compliance with safety and regulatory standards. With a team of 15 employees, e2 engineers has built a reputation for delivering reliable consulting services that balance practical and creative considerations, regardless of project size or complexity. Their clientele includes developers and construction firms, highlighting their role as a trusted partner in the industry. e2 engineers has been involved in numerous projects, showcasing their expertise in structural integrity and design. They are licensed to practice in multiple states, further extending their influence in the structural engineering market. The firm has also been recognized for its contributions to the built environment and employee well-being, reflecting a commitment to quality and community engagement.


6. VN Engineers, Inc.

  • Website: vnengineers.com
  • Ownership type: Private
  • Headquarters: North Haven, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 96%, India 4%
  • Founded year: 1983
  • Headcount: 51-200
  • LinkedIn: vnengineers

VN Engineers, Inc. is a private engineering consulting firm based in North Haven, Connecticut, established in 1983. With a workforce of approximately 70 employees, the company specializes in civil engineering and construction inspection services. Their offerings include design-build, transportation planning, geotechnical services, and notably, structural engineering. VN Engineers has played a significant role in various infrastructure projects across several states, working with both government entities and private clients. Their portfolio includes notable projects such as the George Washington Bridge construction inspection and the Charter Oak Bridge design services. The firm is recognized as a Women-owned Business Enterprise (WBE) and a Disadvantaged Business Enterprise (DBE), which enhances their standing in the industry. VN Engineers has received accolades, including the 2018 ASCE Transportation Award, further solidifying their reputation in the engineering sector.


7. A/Z Corporation

  • Website: a-zcorp.com
  • Ownership type: Corporate
  • Headquarters: North Stonington, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Latest funding: April 2019
  • Founded year: 1968
  • Headcount: 501-1000
  • LinkedIn: a-z-corporation

A/Z Corporation, founded in 1968 and based in North Stonington, Connecticut, is a corporate entity specializing in construction and engineering services. With a workforce of approximately 409 employees, the company operates primarily within the United States. A/Z Corporation provides a comprehensive range of services, including design and engineering, energy management, and specialty services. They cater to various sectors, notably life sciences, healthcare, and manufacturing, where they assist clients in navigating complex projects and regulatory requirements. Their design and engineering services include mechanical, electrical, and civil engineering, showcasing their capability in structural engineering. A/Z Corporation has built a reputation for delivering projects that require meticulous planning and execution, ensuring functionality and compliance with industry standards. Their commitment to integrating advanced technologies in their processes further enhances their service offerings, making them a significant player in the construction and engineering industry.


8. GM2 Associates, Inc.

  • Website: gm2inc.com
  • Ownership type: Corporate
  • Headquarters: Glastonbury, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 97%, Other 3%
  • Latest funding: August 2021
  • Founded year: 1988
  • Headcount: 51-200
  • LinkedIn: gm2-associates-inc

GM2 Associates, Inc., based in Glastonbury, Connecticut, is an engineering and construction firm that has been operational since 1988. With a workforce of approximately 177 employees, GM2 specializes in a wide array of services, including engineering solutions, construction inspection, and surveying. The company primarily serves municipalities and private developers, focusing on infrastructure projects that span various sectors such as transportation, energy, and municipal services. GM2 has played a pivotal role in numerous significant projects, including the rehabilitation and renovation of historic structures and the construction of new facilities. Their structural engineering team is well-versed in providing design, peer review, and special inspection services, ensuring that projects meet high standards of quality and safety. GM2's commitment to excellence is reflected in their approach to risk management and their dedication to community engagement through philanthropy. They have built a reputation for delivering projects on time and within budget, making them a trusted partner in the engineering field.


9. Garg Consulting Services, Inc.


Garg Consulting Services, Inc. is a private engineering firm based in Rocky Hill, Connecticut, with an additional office in Princeton, New Jersey. Founded in 1990, the company has grown to employ around 96 professionals who specialize in a wide array of engineering services. These include structural and civil engineering, rail and transit engineering, as well as construction management and inspection. Garg Consulting has built a strong presence in the Northeastern United States, working on projects across Connecticut, New York, New Jersey, Massachusetts, Rhode Island, and Pennsylvania. Their client base primarily consists of federal and state agencies, reflecting their focus on infrastructure projects that prioritize safety and compliance. The firm is recognized for its commitment to client satisfaction and innovative engineering solutions, which are evident in their extensive project portfolio that includes significant upgrades and improvements to transportation facilities and systems.


10. Siefert Associates, LLC

  • Website: siefertassociates.com
  • Ownership type: Private
  • Headquarters: Watertown, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2000
  • Headcount: 11-50
  • LinkedIn: siefert-associates-llc

Siefert Associates, LLC is an engineering firm based in Watertown, Connecticut, specializing in construction engineering services. Established in 2000 by Vincent Siefert, the company has grown from a one-person operation to a team of approximately 34 professionals. They provide a comprehensive suite of services, including structural engineering, demolition engineering, erection engineering, and geotechnical engineering. The firm is particularly known for its work on large-scale infrastructure projects, where they apply advanced modeling and tailored engineering solutions to meet unique project requirements. Siefert Associates has developed a strong network of contractor clients across North America, particularly in the New York City metropolitan area. Their focus on quality, timely delivery, and effective communication has earned them a reputation for reliability in the construction engineering sector. The firm operates with core values centered around honesty, integrity, and work-life balance, fostering strong relationships with clients and partners alike.


11. Fuss & O'Neill

  • Website: fando.com
  • Ownership type: Private
  • Headquarters: Hartford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1924
  • Headcount: 201-500
  • LinkedIn: fuss-%26-o%27neill

Fuss & O'Neill is an engineering firm based in Hartford, Connecticut, specializing in civil and environmental engineering services. Founded in 1924, the company has built a reputation for addressing complex engineering challenges and regulatory requirements. Their service portfolio includes site planning, climate resilience, water management, and notably, structural engineering. In the structural engineering domain, they focus on bridge design, building design, and the engineering of critical infrastructure such as dams and parking structures. The firm actively engages in projects that promote sustainability and resilience, reflecting their commitment to addressing contemporary environmental challenges. With a workforce of approximately 458 employees, Fuss & O'Neill operates entirely within the United States, ensuring a localized approach to their projects and client needs.


12. Luchs Consulting Engineers|DeCarlo & Doll Architects

  • Website: luchs.com
  • Ownership type: Private
  • Headquarters: Meriden, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1948
  • Headcount: 11-50
  • LinkedIn: luchs-consulting-engineers-llc

Luchs Consulting Engineers|DeCarlo & Doll Architects is a private engineering and architectural consulting firm based in Meriden, Connecticut. Founded in 1948, the company has built a solid reputation over the decades, providing a wide array of services that include civil engineering, traffic engineering, and construction inspection. Their client base primarily consists of municipalities and utility providers in Connecticut, who depend on their expertise for various infrastructure projects. The firm has a strong emphasis on structural engineering, particularly in the design and inspection of educational facilities, bridges, and urban streetscapes. They have received recognition for their client service, including the 2016 Distinguished Service Award from the Connecticut Association of Street & Highway Officials. With a dedicated team of professionals, Luchs Consulting Engineers|DeCarlo & Doll Architects continues to play a significant role in the engineering landscape of Connecticut, ensuring compliance with regulatory standards and delivering quality project outcomes.


13. The S/L/A/M Collaborative (SLAM)

  • Website: slamcoll.com
  • Ownership type: Corporate
  • Headquarters: Glastonbury, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Latest funding: November 2019
  • Founded year: 1976
  • Headcount: 201-500
  • LinkedIn: the-s-l-a-m-collaborative

The S/L/A/M Collaborative (SLAM) is an architecture and engineering firm based in Glastonbury, Connecticut, founded in 1976. With a workforce of approximately 278 employees, SLAM operates through a collaborative model that integrates various design disciplines, including architecture, civil engineering, interior design, and structural engineering. The firm serves clients across multiple sectors, notably education, healthcare, and corporate environments, focusing on creating functional and inspiring spaces. Their approach emphasizes teamwork and innovation, allowing them to tackle complex design challenges effectively. SLAM has a significant presence across the United States, with offices in cities such as Atlanta, Boston, and Los Angeles. They have been recognized for their contributions to the industry, including awards for their projects in healthcare and education. Their commitment to sustainable design and community engagement further highlights their role in shaping environments that enhance the quality of life for users.


14. Cowley Engineering, P.C

  • Website: cowleyengineering.com
  • Ownership type: Private
  • Headquarters: Stamford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1994
  • Headcount: 11-50
  • LinkedIn: cowley-engineering

Cowley Engineering, P.C. is a private engineering firm based in Stamford, Connecticut, with a focus on forensic engineering, structural design, and various inspection and repair services for both commercial and residential buildings. Founded in 1994, the company has built a reputation for providing expert assessments and solutions aimed at ensuring structural integrity and facilitating restoration projects. Their service offerings include façade inspections, parking garage inspections, and waterproofing solutions, among others. Cowley Engineering prides itself on delivering tailored solutions that simplify complex engineering challenges, making them a valuable partner for clients in need of specialized engineering expertise. With a dedicated team of professionals, the firm serves clients across the United States, emphasizing their commitment to quality and client satisfaction.


15. ChemTech Inc.

  • Website: chemt.com
  • Ownership type: Corporate
  • Headquarters: Monroe, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: December 1997
  • Founded year: 1993
  • Headcount: 11-50
  • LinkedIn: chemtech-inc.

ChemTech Inc., founded in 1993 and based in Monroe, Connecticut, is an engineering firm that specializes in loss assessment and engineering services. The company offers a range of solutions, including structural design, process optimization, and project management, primarily serving clients in the petrochemical, pharmaceutical, and aviation industries. With a team of experienced engineers, ChemTech addresses complex operational challenges and ensures compliance with industry standards. Their services extend to structural rehabilitation, where they restore and stabilize various structures, showcasing their commitment to maintaining safety and functionality. ChemTech's engineers are equipped with advanced tools and methodologies, allowing them to provide comprehensive engineering support from conceptual studies to project completion. The firm operates with a strong emphasis on quality and responsiveness, driven by a team of industry veterans who bring decades of experience to the table.


16. AI Engineers, Inc.

  • Website: aiengineers.com
  • Ownership type: Venture Capital
  • Headquarters: Middletown, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 83%, Pakistan 17%
  • Latest funding: $29.5M, November 2018
  • Founded year: 1991
  • Headcount: 201-500
  • LinkedIn: ai-engineers-inc

AI Engineers, Inc. is an engineering firm based in Middletown, Connecticut, established in 1991. The company specializes in a wide array of engineering services, including bridge design, transportation engineering, and water/wastewater management. They serve both government agencies and private sector clients, focusing on infrastructure development and construction management. With a workforce of approximately 369 employees, AI Engineers has a significant presence in the engineering sector. Their project portfolio includes notable works such as bridge inspections, load ratings, and various construction management services. The firm has also received $29.5 million in funding as of November 2018, indicating a commitment to growth and innovation in their engineering practices. AI Engineers is dedicated to improving infrastructure and ensuring the safety and functionality of critical assets across the regions they serve.


17. RZ Design Associates, Inc.


RZ Design Associates, Inc., now a GM2 Company, is a consulting engineering firm based in Rocky Hill, Connecticut. Founded in 1988, the firm specializes in a variety of engineering disciplines, including mechanical, electrical, plumbing, and notably, structural engineering. With a workforce of around 34 employees, RZ Design has built a reputation for delivering customized engineering solutions to a wide range of clients, including educational institutions and government facilities. The firm has recently expanded its reach and capabilities through its acquisition by GM2 Associates, Inc. in May 2024, which allows them to provide a more comprehensive suite of engineering services. RZ Design's portfolio showcases a variety of completed projects, reflecting their active engagement in the industry and commitment to quality service. They operate nationally from multiple offices along the East Coast and beyond, ensuring they can meet the needs of their clients effectively.


18. WMC Consulting Engineers

  • Website: wmcengineers.com
  • Ownership type: Private
  • Headquarters: Newington, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 83%, Philippines 8%, Serbia 8%
  • Founded year: 1988
  • Headcount: 11-50
  • LinkedIn: wmc-consulting-engineers

WMC Consulting Engineers, founded in 1988 and based in Newington, Connecticut, is a private consulting engineering firm specializing in civil engineering and infrastructure projects. With a team of approximately 36 employees, the firm provides a comprehensive range of services including planning, design, and construction management. They have a strong focus on structural engineering, particularly in the design and management of bridges, roadways, and various municipal projects. WMC has successfully completed projects for over 120 municipalities and state agencies in Connecticut and western Massachusetts, demonstrating their expertise and reliability in the field. The firm is recognized for its commitment to technical excellence, innovative solutions, and effective community engagement, which has earned them a solid reputation among clients. Notably, WMC has received awards for its dedication to engineering excellence, including a Distinguished Service Award from the Connecticut Association of Street and Highway Officials. Their experience spans a variety of projects, from dam rehabilitation to the design of greenways, showcasing their capability in handling complex engineering challenges.


19. Centek Engineering, Inc.

  • Website: centekeng.com
  • Ownership type: Private
  • Headquarters: Branford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1997
  • Headcount: 11-50
  • LinkedIn: centek-engineering-inc.

Centek Engineering, Inc., based in Branford, Connecticut, is a private engineering firm founded in 1997. With a team of approximately 32 employees, the company specializes in providing design solutions and project management services across various sectors, including healthcare, residential, and telecommunications. Centek is dedicated to a client-oriented approach, ensuring timely and effective design solutions tailored to meet the specific needs of their clients. Their portfolio features a range of projects, particularly in the healthcare sector, where they have renovated and constructed facilities such as the Yale New Haven Hospital's Pediatric Catheterization Lab and the Adult Dental Center. The firm is known for its ability to handle complex projects with sophisticated requirements, showcasing their expertise in structural engineering and project execution. Centek Engineering has not reported any funding, indicating a self-sustained operational model.


20. Innovative Engineering Services

  • Website: iesllc.biz
  • Ownership type: Private
  • Headquarters: Wallingford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 61%, Pakistan 29%, India 10%
  • Founded year: 2000
  • Headcount: 51-200
  • LinkedIn: innovative-engineering-services

Innovative Engineering Services, LLC, based in Wallingford, Connecticut, is a private engineering firm founded in 2000. The company specializes in providing a wide range of engineering and design services across multiple sectors, including healthcare, education, commercial, and public projects. With a team of professional engineers and skilled technical personnel, IES focuses on delivering innovative solutions tailored to the unique challenges of each project. Their services include engineering design, Building Information Modeling (BIM), commissioning, and technology integration, emphasizing sustainability and operational efficiency. IES has successfully completed numerous projects, such as the renovation of medical facilities and educational institutions, demonstrating their capability in handling complex structural engineering tasks. The firm has not reported any funding, indicating a self-sustained growth model since its inception.



Structural Engineering Insights: Key Companies in Connecticut


CompanyHeadquarterSizeFoundedOwnership
The Di Salvo Engineering Group, Structural Engineers, Inc.Danbury, Connecticut, United States (USA)11-501973Private
Russell and Dawson IncEast Hartford, Connecticut, United States (USA)11-501965Private
Loureiro Engineering Associates, Inc.Plainville, Connecticut, United States (USA)51-2001975Private
BL CompaniesMeriden, Connecticut, United States (USA)201-5001986Private
e2 engineersNew London, Connecticut, United States (USA)11-502002Private
VN Engineers, Inc.North Haven, Connecticut, United States (USA)51-2001983Private
A/Z CorporationNorth Stonington, Connecticut, United States (USA)501-10001968Corporate
GM2 Associates, Inc.Glastonbury, Connecticut, United States (USA)51-2001988Corporate
Garg Consulting Services, Inc.Rocky Hill, Connecticut, United States (USA)51-2001990Private
Siefert Associates, LLCWatertown, Connecticut, United States (USA)11-502000Private
Fuss & O'NeillHartford, Connecticut, United States (USA)201-5001924Private
Luchs Consulting Engineers|DeCarlo & Doll ArchitectsMeriden, Connecticut, United States (USA)11-501948Private
The S/L/A/M Collaborative (SLAM)Glastonbury, Connecticut, United States (USA)201-5001976Corporate
Cowley Engineering, P.CStamford, Connecticut, United States (USA)11-501994Private
ChemTech Inc.Monroe, Connecticut, United States (USA)11-501993Corporate
AI Engineers, Inc.Middletown, Connecticut, United States (USA)201-5001991Venture Capital
RZ Design Associates, Inc.Rocky Hill, Connecticut, United States (USA)201-5001988Private
WMC Consulting EngineersNewington, Connecticut, United States (USA)11-501988Private
Centek Engineering, Inc.Branford, Connecticut, United States (USA)11-501997Private
Innovative Engineering ServicesWallingford, Connecticut, United States (USA)51-2002000Private


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