Engineering consulting in Ohio thrives in a competitive market, where companies provide essential services including design, management, and compliance solutions across sectors like construction, healthcare, and environmental projects. Recent trends point towards innovative practices, such as sustainable building and advanced technologies like AI and automation, transforming traditional approaches. A significant focus on energy efficiency and environmental responsibility is emerging as regulations tighten and client expectations evolve. Industry players are not just solving engineering challenges but are also contributing to a greener future, making strategic partnerships and investments critical for remaining relevant and responsive to market demands.

The companies listed vary in size, from small firms with under 50 employees to larger organizations employing thousands. Headquartered primarily in key Ohio cities such as Columbus, Dayton, and Toledo, these firms were founded between the early 20th century and the late 20th century. Many specialize in areas such as civil, mechanical, and structural engineering, while some focus on niche sectors like energy management and environmental consulting. Collectively, they represent a robust hub of engineering expertise necessary to meet growing demand for infrastructure development and sustainable practices.

Continue reading to explore the top engineering consulting companies in Ohio.

Top 23 Engineering Consulting Companies in Ohio

1. Woolpert

• Website: woolpert.com
• Ownership type: Private Equity
• Headquarters: Dayton, Ohio, United States (USA)
• Employee distribution: United States (USA) 95%, South Africa 3%, Other 2%
• Latest funding: $2.9M, November 2022
• Founded year: 1911
• Headcount: 1001-5000
• LinkedIn: woolpert

Woolpert is a professional services firm based in Dayton, Ohio, specializing in architecture, engineering, and geospatial solutions. Established in 1911, the company has built a reputation for providing innovative and cost-effective services to a wide range of clients, including government entities and private organizations. Woolpert's expertise spans various sectors such as aviation, education, transportation, and utilities, allowing them to address complex infrastructure challenges effectively. The firm employs approximately 1,290 professionals, primarily in the United States, with a small presence in South Africa and other regions. In November 2022, Woolpert secured funding, which reflects their commitment to growth and adaptation in a competitive market. Their comprehensive service offerings include civil engineering, surveying, and advanced technologies like Lidar and GIS, positioning them as a significant player in the engineering consulting industry.

2. ThermalTech Engineering

• Website: thermaltech.com
• Ownership type: Private
• Headquarters: Cincinnati, Ohio, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Founded year: 1980
• Headcount: 51-200
• LinkedIn: thermaltech-engineering_2

ThermalTech Engineering, based in Cincinnati, Ohio, has been a prominent player in the engineering consulting sector since its inception in 1980. With a workforce of approximately 186 employees, the company specializes in MEP engineering, process engineering, and energy management. They cater to a variety of sectors, including industrial, healthcare, food and beverage, and pharmaceuticals, providing customized solutions that enhance operational efficiency and compliance. ThermalTech operates through a network of offices across six states, allowing them to serve clients effectively. Their team includes over 30 Professional Engineers registered in 32 states, along with LEED Certified Professionals and Certified Energy Managers, showcasing their commitment to high standards in engineering practices. The firm has successfully completed thousands of projects, including central utility plant designs and energy audits, and has received recognition for its innovative approaches and sustainable practices.

3. SSOE Group

• Website: ssoe.com
• Ownership type: Private
• Headquarters: Toledo, Ohio, United States (USA)
• Employee distribution: United States (USA) 81%, Mexico 11%, India 6%, Other 2%
• Latest funding: $928,000, October 2023
• Founded year: 1948
• Headcount: 1001-5000
• LinkedIn: ssoe-group

SSOE Group is an architecture and engineering firm based in Toledo, Ohio, with a history dating back to 1948. The company employs approximately 1,666 professionals and operates primarily in the United States, with additional presence in Mexico and India. SSOE offers a comprehensive range of services, including architecture, engineering, project management, and consulting. They cater to various sectors such as manufacturing, healthcare, and education, focusing on delivering high-quality projects tailored to client needs. The firm is recognized for its commitment to collaboration and innovation, which are integral to their project execution. SSOE has been acknowledged in multiple industry rankings, including being named a top firm in industrial engineering and semiconductor design. Their recent funding of $927,500 in October 2023 indicates a proactive approach to growth and development within the engineering consulting space.

4. LJB Inc.

• Website: ljbinc.com
• Ownership type: Private Equity
• Headquarters: Miamisburg, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: July 2022
• Founded year: 1966
• Headcount: 201-500
• LinkedIn: ljbinc

LJB Inc., founded in 1966 and based in Miamisburg, Ohio, is a national engineering firm that specializes in civil and structural engineering, safety, and environmental services. The company serves a wide array of clients, including commercial enterprises, educational institutions, healthcare facilities, and government agencies. LJB Inc. is known for its innovative approach to infrastructure projects, having designed significant structures such as the world’s largest tilt-up concrete building. The firm operates across multiple states and holds professional engineering licenses in all 50 states, showcasing its capability to handle projects nationwide. LJB Inc. emphasizes a culture of integrity, quality, and service, which is reflected in their commitment to professional development and community involvement. Their recent acquisitions and expansion into new markets further demonstrate their active role in the engineering consulting industry.

5. Heapy

• Website: heapy.com
• Ownership type: Private
• Headquarters: Dayton, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1945
• Headcount: 201-500
• LinkedIn: heapy

Heapy is a consulting engineering firm based in Dayton, Ohio, with a history dating back to 1945. The company specializes in mechanical, electrical, and plumbing (MEP) engineering, building optimization, and sustainability services. Heapy serves a variety of sectors, including healthcare, education, aviation, and commercial markets. Their services range from energy audits and commissioning to intelligent building management and fire protection. Heapy prides itself on a collaborative approach, ensuring that projects align with client goals and regulatory requirements. The firm has completed over 1,000 projects in 2023 alone, showcasing its active engagement in the industry. Heapy also emphasizes community involvement, encouraging employees to participate in charitable activities and support local initiatives. This commitment to both engineering excellence and community service positions Heapy as a significant player in the consulting engineering field.

6. Advanced Engineering Consultants

• Website: aecmep.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 88%, Nigeria 12%
• Founded year: 1998
• Headcount: 51-200
• LinkedIn: advanced-engineering-consultants

Advanced Engineering Consultants (AEC) is an engineering consulting firm based in Columbus, Ohio, founded in 1998. The company specializes in mechanical, electrical, and plumbing engineering design, as well as fire protection and sustainability services. AEC serves a wide range of clients, including government agencies, educational institutions, and commercial entities, providing expert solutions to complex engineering challenges. With a workforce of approximately 68 employees, AEC has expanded its operations to multiple locations, including offices in Cincinnati, Cleveland, and Virginia Beach. The firm has been recognized for its contributions to the industry, ranking 15th among the largest engineering firms in Central Ohio based on consulting engineering billings. AEC is also committed to sustainable design practices, aiming to reduce energy consumption and optimize building performance. Their dedication to quality and client satisfaction is reflected in numerous testimonials from satisfied clients, highlighting their professionalism and attention to detail.

7. GPD Group

• Website: gpdgroup.com
• Ownership type: Private
• Headquarters: Akron, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $105,000, September 2023
• Founded year: 1961
• Headcount: 501-1000
• LinkedIn: gpd-group

GPD Group, founded in 1961 and based in Akron, Ohio, is a private architecture and engineering firm that offers a comprehensive range of services in planning, design, and consulting. With a workforce of approximately 714 employees, the company operates across the United States, serving both public and private sector clients. GPD Group specializes in various sectors, including education, healthcare, and infrastructure, demonstrating a strong commitment to delivering quality and functional projects. Their unique employee ownership structure fosters a collaborative culture, allowing for agile decision-making and innovative problem-solving. Recently, GPD Group secured funding of $105,344 in September 2023, indicating ongoing growth and investment in their capabilities. The firm is dedicated to making a positive impact in the communities they serve, engaging in volunteer efforts and mentorship programs that enhance their social responsibility.

8. DLZ Corporation

• Website: dlz.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 94%, Costa Rica 6%
• Founded year: 1946
• Headcount: 501-1000
• LinkedIn: dlz-corporation

DLZ Corporation, based in Columbus, Ohio, is an architecture and engineering firm that has been operational since 1946. With a workforce of approximately 859 employees, the company provides a comprehensive range of professional services. These include ADA compliance assistance, environmental consulting, construction management, and various engineering disciplines such as geotechnical and transportation engineering. DLZ serves a mix of local governments and commercial clients, helping them navigate regulatory requirements and enhance infrastructure. Their multidisciplinary approach ensures that they can tailor solutions to meet the specific needs of each project. DLZ has also been recognized for its commitment to sustainability, with LEED-accredited professionals actively engaged in promoting eco-friendly practices. The firm has received several awards, including recognition in the Top 500 Design Firms and as a top architecture/engineering firm, underscoring its active role in the industry.

9. M-Engineering

• Website: mengineering.us.com
• Ownership type: Private
• Headquarters: Westerville, Ohio, United States (USA)
• Employee distribution: United States (USA) 96%, United Arab Emirates 4%
• Founded year: 1973
• Headcount: 51-200
• LinkedIn: m-engineering_2

M-Engineering, based in Westerville, Ohio, has been a player in the engineering consulting field since its inception in 1973. The firm specializes in mechanical, electrical, plumbing, structural, and technology design, catering to a variety of sectors including healthcare, education, and commercial industries. With a workforce of approximately 83 employees, M-Engineering prides itself on delivering innovative and sustainable solutions tailored to meet the specific needs of its clients. The company emphasizes energy efficiency and environmental responsibility in its projects, which is increasingly important in today's construction and design landscape. M-Engineering has successfully completed numerous projects, showcasing its expertise and commitment to quality. The firm is licensed to operate in all 50 states, the District of Columbia, and Puerto Rico, allowing it to serve a broad client base. Its strategic partnerships extend internationally, further enhancing its capabilities and reach.

10. ms consultants, inc.

• Website: msconsultants.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 99%
• Founded year: 1963
• Headcount: 201-500
• LinkedIn: ms-consultants-inc-

ms consultants, inc. is a consulting firm based in Columbus, Ohio, specializing in engineering, architecture, planning, and environmental services. Founded in 1963, the company has built a strong reputation for providing innovative solutions to complex infrastructure and environmental challenges. They serve a wide range of clients, including government entities, educational institutions, and private developers. Their service portfolio includes transportation planning, water resource management, energy services, and sustainable design, among others. With a workforce of over 500 employees, ms consultants operates in several states, including Ohio, Pennsylvania, Indiana, North Carolina, South Carolina, and West Virginia. The firm has been recognized in the Top 500 Design Firms by Engineering News Record, reflecting its significant presence in the industry. Their commitment to community involvement and a collaborative approach to project delivery further enhances their standing in the engineering consulting sector.

11. CT Consultants, A Verdantas Company

• Website: ctconsultants.com
• Ownership type: Private
• Headquarters: Mentor, Ohio, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Founded year: 1922
• Headcount: 201-500
• LinkedIn: ct-consultants

CT Consultants, A Verdantas Company is a consulting firm based in Mentor, Ohio, specializing in engineering, architecture, planning, and construction services. Established in 1922, the company has built a reputation for providing professional services to a variety of clients, including those in education, government, and healthcare sectors. Their expertise spans multiple areas, such as environmental consulting, geotechnical engineering, land surveying, and project management. CT Consultants is dedicated to helping clients navigate complex projects and regulatory landscapes, ensuring compliance and successful outcomes. The firm emphasizes a talent-focused culture, fostering a collaborative environment where professionals share knowledge and expertise to better serve clients. Their commitment to developing long-term relationships with clients reflects a strategic approach to project management and service delivery.

12. Burgess & Niple

• Website: burgessniple.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1912
• Headcount: 501-1000
• LinkedIn: burgess-%26-niple

Burgess & Niple is an engineering and architecture firm based in Columbus, Ohio, with a mission to improve communities through practical infrastructure solutions. Established in 1912, the company has built a reputation for addressing infrastructure challenges while enhancing quality of life through sustainable practices. They offer a wide range of services, including engineering, architectural design, and environmental engineering, primarily catering to municipalities and government agencies. Their project portfolio reflects a commitment to innovation, as seen in their development of the PipeAId™ system, which utilizes artificial intelligence for sewer pipe inspections. This integration of technology into their services highlights their adaptability in a rapidly evolving industry. With a workforce of approximately 746 employees, Burgess & Niple continues to play a significant role in shaping infrastructure across the United States.

13. CTL Engineering, Inc.

• Website: ctleng.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 96%, Other 4%
• Founded year: 1927
• Headcount: 201-500
• LinkedIn: ctl-engineering-inc-

CTL Engineering, Inc., based in Columbus, Ohio, is a private engineering consulting firm founded in 1927. With a workforce of approximately 299 employees, the company provides a wide array of services that include civil engineering, geotechnical engineering, environmental remediation, forensic science, and IT services. They cater to multiple sectors, such as construction, healthcare, and manufacturing, ensuring compliance, safety, and efficiency in their projects. CTL Engineering is also involved in specialized testing services, which further enhances their capabilities in the engineering consulting space. The firm operates regional offices in Indiana, West Virginia, and Kentucky, allowing them to serve a broader client base. Their employee stock ownership plan (ESOP) promotes a culture of ownership and collaboration, which can lead to improved service delivery and client satisfaction.

14. Ceso, INC.

• Website: cesoinc.com
• Ownership type: Private
• Headquarters: Dayton, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1987
• Headcount: 201-500
• LinkedIn: ceso-inc

Ceso, INC. is a professional services firm based in Dayton, Ohio, specializing in engineering, environmental consulting, architecture, and landscape architecture. Established in 1987, the company has built a reputation for delivering tailored solutions to complex project challenges across various sectors, including retail, hospitality, and public works. Ceso emphasizes collaboration and long-term relationships with clients, which has allowed them to maintain a strong presence in the industry. With a workforce of approximately 406 employees and 15 offices nationwide, Ceso is well-equipped to handle a wide range of projects. Their services include civil engineering, environmental assessments, inspection, and landscape architecture, among others. Ceso's commitment to quality and client satisfaction positions them as a reliable partner in the engineering consulting space.

15. MDA Engineering, Inc.

• Website: mdaengr.com
• Ownership type: Private
• Headquarters: Maumee, Ohio, United States (USA)
• Founded year: 1976
• Headcount: 11-50
• LinkedIn: mda-engineering-inc.

MDA Engineering, Inc., based in Maumee, Ohio, has been a player in the engineering consulting sector since its inception in 1976. Specializing in mechanical and electrical engineering, the firm offers a comprehensive suite of services that includes consulting, design/build engineering, and project management. MDA Engineering has worked on a variety of projects, from new construction to renovations, and has a strong emphasis on sustainable design practices. Their expertise extends to various sectors, including commercial, educational, and industrial facilities. The firm prides itself on its ability to adapt to the evolving needs of its clients, ensuring that they deliver effective and efficient engineering solutions. MDA Engineering's commitment to quality and client satisfaction has allowed them to maintain long-standing relationships with a diverse clientele, further solidifying their position in the industry.

16. Korda/Nemeth Engineering

• Website: korda.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1964
• Headcount: 51-200
• LinkedIn: kordanemeth-engineering

Korda/Nemeth Engineering, based in Columbus, Ohio, is a private engineering firm that has been operational since 1964. With a workforce of approximately 123 employees, the company specializes in a broad spectrum of engineering services, including civil, structural, mechanical, and electrical engineering. Korda/Nemeth Engineering has built a strong portfolio, serving clients across various sectors such as healthcare, education, and government. Their projects often involve significant construction and renovation efforts, showcasing their expertise in managing complex engineering challenges. The firm has been recognized for its contributions to the industry, receiving awards for notable projects, which highlights their commitment to quality and innovation. Korda/Nemeth Engineering also emphasizes sustainability in its practices, reflecting a modern approach to engineering that resonates with current market demands.

17. BSI Engineering

• Website: bsiengr.com
• Ownership type: Private
• Headquarters: Cincinnati, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2007
• Headcount: 201-500
• LinkedIn: bsi-engineering

BSI Engineering, based in Cincinnati, Ohio, is a private engineering firm founded in 2007. With a team of over 250 employees, many of whom possess more than 20 years of experience, the company offers a wide array of services tailored to meet the needs of various industries. Their expertise spans architecture, automation, project management, and wastewater treatment, among others. BSI Engineering serves clients in sectors such as chemical manufacturing, food and beverage, and pharmaceuticals, focusing on improving production efficiency and ensuring compliance with safety regulations. The firm has successfully completed numerous projects, showcasing their ability to handle complex engineering challenges. Their commitment to quality and client satisfaction is evident in their integrated engineering-led EPCM process, which emphasizes collaboration and thoroughness throughout project execution.

18. Environmental Design Group

• Website: envdesigngroup.com
• Ownership type: Private
• Headquarters: Akron, Ohio, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Founded year: 1984
• Headcount: 51-200
• LinkedIn: environmental-design-group

Environmental Design Group, based in Akron, Ohio, is a private consulting firm founded in 1984. With a workforce of approximately 138 employees, the company specializes in planning, design, and civil engineering services. Their offerings include community planning, ecological and environmental consulting, and construction management. They cater to a variety of clients, including municipalities and private developers, focusing on enhancing community infrastructure and promoting sustainability. The firm has a strong emphasis on collaboration and quality, aiming to create positive impacts in the communities they serve. Their extensive service portfolio covers areas such as drinking water, wastewater management, transportation engineering, and green infrastructure, showcasing their comprehensive approach to engineering challenges. Environmental Design Group's commitment to community well-being and environmental stewardship positions them as a relevant player in the engineering consulting sector.

19. The Mannik & Smith Group, Inc.

• Website: manniksmithgroup.com
• Ownership type: Private Equity
• Headquarters: Maumee, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: July 2022
• Founded year: 1955
• Headcount: 501-1000
• LinkedIn: the-mannik-%26-smith-group-inc-

The Mannik & Smith Group, Inc. is a consulting and engineering firm based in Maumee, Ohio, with a strong presence in both public and private sectors. Founded in 1955, the company has built a reputation for providing a wide array of services that include civil engineering, environmental compliance, construction management, and more. Their expertise extends to areas such as geotechnical engineering, ecological services, and brownfield revitalization, showcasing their commitment to enhancing infrastructure while promoting environmental sustainability. The firm employs a team of skilled professionals who are adept at navigating complex projects and regulatory requirements, ensuring that clients receive effective and efficient solutions. Their recent inclusion in the Engineering News-Record's Midwest Top Design Firms further highlights their active role and recognition in the engineering consulting industry.

20. CBC Engineers & Associates, Ltd

• Website: cbceng.com
• Ownership type: Private
• Headquarters: Centerville, Ohio, United States (USA)
• Founded year: 1995
• Headcount: 51-200
• LinkedIn: cbcengineers-and-associates-ltd

CBC Engineers & Associates, Ltd, operating under the name Koontz Bryant Johnson Williams (KBJW), is a privately owned engineering firm based in Henrico, Virginia. Founded in 1995, the company specializes in a variety of engineering services, including civil engineering, land planning, landscape architecture, and environmental compliance. KBJW serves a wide range of clients, from government agencies to private sector businesses, focusing on infrastructure development and environmental management. The firm has been recognized for its workplace culture, being named a top workplace by the Richmond Times-Dispatch in 2023. KBJW is also involved in community initiatives, such as supporting Engineers Without Borders and participating in local charitable events. Their commitment to quality and community engagement reflects their active role in the engineering consulting industry.

21. SMBH, Inc.

• Website: smbhinc.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1972
• Headcount: 11-50
• LinkedIn: smbh

SMBH, Inc. is a structural engineering firm based in Columbus, Ohio, founded in 1972. The company is dedicated to providing intelligent and sustainable engineering solutions for architects, contractors, and building owners. With a team of 46 employees, SMBH focuses on structural design, documentation, and expert analysis, ensuring that projects are not only safe and functional but also cost-effective. Their extensive portfolio includes over 25,000 projects across various sectors, such as civic, commercial, education, healthcare, and industrial. SMBH is known for its collaborative approach, working closely with clients to ensure that structural designs align with their visions. The firm has also been recognized for its commitment to sustainability, participating in programs like the US Green Building Council LEED Program. SMBH has a strong presence in the industry, with engineers registered in all 48 contiguous states and Washington, D.C., and has worked on projects both nationally and internationally.

22. Dynotec, Inc.

• Website: dynotecinc.com
• Ownership type: Private
• Headquarters: Columbus, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1990
• Headcount: 11-50
• LinkedIn: dynotec

Dynotec, Inc. is an engineering and architectural firm based in Columbus, Ohio, with additional offices in Cincinnati, Cleveland, and Pittsburgh. Established in 1990, the company has built a strong reputation for providing a comprehensive range of professional services, including architectural design, structural engineering, transportation engineering, civil engineering, construction management, and surveying. Dynotec serves a variety of clients, notably government agencies and municipalities, focusing on infrastructure projects that enhance community quality of life. The firm prides itself on its commitment to quality assurance and effective communication throughout project lifecycles. With a team of experienced professionals averaging over 25 years in the industry, Dynotec is well-equipped to manage projects from inception to completion. Their extensive certifications and pre-qualifications with state and local agencies underscore their credibility and expertise in the field.

23. HWH Architects Engineers Planners Inc.

• Website: hwhaep.com
• Ownership type: Private
• Headquarters: Cleveland, Ohio, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1908
• Headcount: 51-200
• LinkedIn: hwh-architects-engineers-planners-inc-

HWH Architects Engineers Planners Inc. is a professional services firm based in Cleveland, Ohio, specializing in architecture and engineering. Founded in 1908, the company has built a reputation for delivering a wide array of services, including civil, electrical, mechanical, and structural engineering, as well as architecture and interior design. HWH serves a variety of clients, including those in the industrial, commercial, and government sectors, providing tailored solutions to meet their specific project needs. The firm emphasizes project planning and management, ensuring that clients receive comprehensive support throughout the project lifecycle. With a team of experienced professionals, HWH is committed to addressing complex engineering challenges and delivering innovative solutions. Their portfolio includes significant projects across various markets, reflecting their capability and expertise in the field.

Engineering Consulting Insights: Key Companies in Ohio

Company	Headquarter	Size	Founded	Ownership
Woolpert	Dayton, Ohio, United States (USA)	1001-5000	1911	Private Equity
ThermalTech Engineering	Cincinnati, Ohio, United States (USA)	51-200	1980	Private
SSOE Group	Toledo, Ohio, United States (USA)	1001-5000	1948	Private
LJB Inc.	Miamisburg, Ohio, United States (USA)	201-500	1966	Private Equity
Heapy	Dayton, Ohio, United States (USA)	201-500	1945	Private
Advanced Engineering Consultants	Columbus, Ohio, United States (USA)	51-200	1998	Private
GPD Group	Akron, Ohio, United States (USA)	501-1000	1961	Private
DLZ Corporation	Columbus, Ohio, United States (USA)	501-1000	1946	Private
M-Engineering	Westerville, Ohio, United States (USA)	51-200	1973	Private
ms consultants, inc.	Columbus, Ohio, United States (USA)	201-500	1963	Private
CT Consultants, A Verdantas Company	Mentor, Ohio, United States (USA)	201-500	1922	Private
Burgess & Niple	Columbus, Ohio, United States (USA)	501-1000	1912	Private
CTL Engineering, Inc.	Columbus, Ohio, United States (USA)	201-500	1927	Private
Ceso, INC.	Dayton, Ohio, United States (USA)	201-500	1987	Private
MDA Engineering, Inc.	Maumee, Ohio, United States (USA)	11-50	1976	Private
Korda/Nemeth Engineering	Columbus, Ohio, United States (USA)	51-200	1964	Private
BSI Engineering	Cincinnati, Ohio, United States (USA)	201-500	2007	Private
Environmental Design Group	Akron, Ohio, United States (USA)	51-200	1984	Private
The Mannik & Smith Group, Inc.	Maumee, Ohio, United States (USA)	501-1000	1955	Private Equity
CBC Engineers & Associates, Ltd	Centerville, Ohio, United States (USA)	51-200	1995	Private
SMBH, Inc.	Columbus, Ohio, United States (USA)	11-50	1972	Private
Dynotec, Inc.	Columbus, Ohio, United States (USA)	11-50	1990	Private
HWH Architects Engineers Planners Inc.	Cleveland, Ohio, United States (USA)	51-200	1908	Private

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