Geotechnical engineering companies in Ohio focus on analyzing soil, rock, and groundwater to ensure safe construction practices. These firms provide essential services such as site assessments, materials testing, and geotechnical consultations, playing a vital role in construction and infrastructure projects. With advances in technology and increasing demands for sustainable practices, the industry is shifting toward innovative methodologies and more comprehensive environmental considerations. Notably, Ohio is home to a mix of long-established firms and emerging companies, reflecting a blend of tradition and modernity in engineering solutions that meet the evolving needs of the construction landscape.


This list features 24 prominent geotechnical engineering companies based in Ohio, ranging in size from small firms to large organizations. Founded from 1911 to 2018, these companies operate across several Ohio cities, including Columbus, Dayton, and Cincinnati. Each specializes in various aspects of geotechnical engineering, including materials testing, site exploration, and environmental assessments, catering to both public and private clients. The firms vary in scope and expertise, reflecting a rich history in engineering while adapting to current industry demands.


Continue reading to discover the top geotechnical engineering companies in Ohio.


Top 24 Geotechnical Engineering Companies in Ohio


1. Geo-Sci

  • Website: geo-sci.com
  • Ownership type: Private
  • Headquarters: Berea, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1996
  • Headcount: 11-50
  • LinkedIn: geosci

Geo-Sci, Inc. is an engineering consulting firm based in Berea, Ohio, specializing in geotechnical engineering, materials testing, and inspection services. Established in 1996, the company has built a strong reputation over nearly 30 years of operation. Geo-Sci serves a wide range of clients in the construction industry, including private developers, architects, contractors, and government agencies. Their services cover various projects such as commercial, residential, and industrial developments, as well as roadway projects, sewer lines, and bridges. The firm emphasizes a personal approach to each project, ensuring that they meet the specific needs and goals of their clients. Geo-Sci is also recognized for its commitment to quality, having been pre-qualified by the Ohio Department of Transportation and accredited by the AASHTO Accreditation Program. Their team consists of experienced professionals dedicated to providing expert analysis and compliance assurance throughout the construction process.


2. Geotechnical Consultants, Inc.

  • Website: gci2000.com
  • Ownership type: Private
  • Headquarters: Westerville, Ohio, United States (USA)
  • Employee distribution: United States (USA) 94%, Iran 3%, Nigeria 3%
  • Founded year: 1979
  • Headcount: 51-200
  • LinkedIn: geotechnical-consultants-inc.

Geotechnical Consultants, Inc. (GCI), based in Westerville, Ohio, is a consulting firm that specializes in geotechnical engineering, environmental consulting, and construction materials testing. Established in 1979, GCI has built a reputation for providing practical and cost-effective solutions to developers, contractors, and property managers. The company operates primarily in the Midwest and Mid-Atlantic regions, offering a wide array of services that help clients manage risks and ensure compliance with regulatory standards during construction projects. GCI's expertise includes subsurface exploration, soil testing, environmental assessments, and special inspections, among others. Their team comprises experienced professionals who are well-versed in the complexities of construction and environmental regulations. GCI also utilizes advanced technologies, such as drone imaging, to enhance their service delivery and improve project outcomes. With a workforce of approximately 143 employees, GCI continues to be an active and relevant player in the geotechnical engineering industry.


3. National Engineering & Architectural Services Inc.


National Engineering & Architectural Services Inc. (NEAS), based in Columbus, Ohio, has been providing engineering and construction services since its inception in 1992. Originally a small bridge design firm, NEAS has evolved into a multi-faceted organization that offers a wide range of services, including geotechnical engineering, materials testing, and surveying. The company operates three AASHTO-accredited laboratories, ensuring high standards in their testing and analysis processes. NEAS has worked on numerous projects across Ohio, collaborating with over 50 firms and serving clients that range from federal and state agencies to educational institutions. Their expertise in geotechnical engineering is complemented by their capabilities in construction inspection and materials testing, making them a comprehensive service provider in the civil engineering sector. NEAS is also recognized as a certified Disadvantaged Business Enterprise (DBE) in Ohio, which reflects their commitment to inclusivity and diversity in the industry.


4. 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, based in Mentor, Ohio, is a private consulting firm that specializes in engineering, architecture, planning, and construction services. Founded in 1922, the company has built a solid reputation for delivering professional services across various sectors, including education, government, and healthcare. Their geotechnical engineering division plays a crucial role in their offerings, providing essential services such as field testing, drilling, and comprehensive soils laboratory testing. This division is vital for ensuring the safety and stability of structures, pavements, and containment facilities. CT Consultants is committed to helping clients navigate complex projects and regulatory requirements, leveraging their extensive experience and knowledge in the industry. The firm employs around 207 professionals, primarily in the United States, and emphasizes a culture of collaboration and client-focused solutions.


5. Bowser-Morner, Inc.

  • Website: bowser-morner.com
  • Ownership type: Private
  • Headquarters: Dayton, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1911
  • Headcount: 51-200
  • LinkedIn: bowser-morner-inc-

Bowser-Morner, Inc. is a consulting engineering and testing firm based in Dayton, Ohio, with a history dating back to 1911. The company specializes in geotechnical engineering, environmental consulting, and laboratory testing, serving clients primarily in the construction and environmental sectors. Bowser-Morner provides essential services such as site selection, subsurface exploration, and forensic engineering, ensuring that projects are built on solid foundations. Their team of experienced engineers and scientists is dedicated to delivering reliable data and actionable recommendations, helping clients manage risks and comply with regulatory standards. The firm is also recognized for its independent testing capabilities, holding accreditation from the American Council of Independent Laboratories. With a focus on quality and client satisfaction, Bowser-Morner continues to play a significant role in the geotechnical engineering industry.


6. 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, environmental remediation, forensic science, and notably, geotechnical engineering. Their geotechnical engineering services are essential for assessing soil and rock properties, which are critical for the design and construction of foundations, retaining structures, and other infrastructure projects. CTL Engineering serves various sectors, including construction, healthcare, and manufacturing, ensuring compliance and safety in their projects. The firm operates with a strong employee ownership model, fostering a culture of collaboration and accountability among its staff. Their commitment to quality and innovation is evident in their extensive experience and the comprehensive nature of their services, which also include testing and inspection, construction administration, and environmental assessments.


7. Soil Testing & Engineering, Ltd.

  • Website: soiltestltd.com
  • Ownership type: Private
  • Headquarters: Dublin, Ohio, United States (USA)
  • Employee distribution: United States (USA) 71%, Nepal 10%, Ghana 10%, Other 10%
  • Founded year: 1999
  • Headcount: 11-50
  • LinkedIn: soil-testing-%26-engineering-ltd

Soil Testing & Engineering, Ltd. (STL) is a consulting engineering firm based in Dublin, Ohio, founded in 1999. The company specializes in geotechnical and environmental engineering, offering a comprehensive suite of services that includes soil and concrete testing, environmental assessments, and construction project support. With a team of licensed professionals and technicians, STL has built a reputation for delivering quality services tailored to the needs of their clients. Their laboratory is certified by several authoritative bodies, ensuring that they maintain high standards in testing and analysis. STL has worked on a variety of projects across sectors such as construction, education, and transportation, demonstrating their capability to handle both small and large-scale projects. Their commitment to effective communication and client relationships further solidifies their position in the industry.


8. 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, founded in 1955. With a workforce of approximately 434 employees, the company provides a wide array of services that include civil engineering, environmental compliance, construction management, and notably, geotechnical engineering. Their geotechnical engineering services involve in-depth analysis and recommendations, supported by in-house drilling capabilities and a nationally-accredited laboratory. This allows them to efficiently deliver projects while ensuring compliance with regulatory standards. The firm serves both public and private sector clients, helping them navigate complex projects and regulatory requirements. Their commitment to innovative solutions enhances infrastructure and promotes environmental sustainability, making them a significant player in the engineering sector.


9. CBC Engineers & Associates, Ltd


CBC Engineers & Associates, Ltd, operating under the name Koontz Bryant Johnson Williams (KBJW), is a private engineering firm based in Centerville, Ohio. Founded in 1995, the company has grown to employ between 51 and 200 individuals. KBJW provides a variety of services, including civil engineering, environmental compliance, land planning, and notably, geotechnical engineering. Their client base includes both government agencies and private sector businesses, indicating a broad market reach. The firm has been recognized for its community involvement and has participated in various projects that require expertise in infrastructure development and environmental management. Their laboratory services are accredited by relevant authorities, ensuring quality in their testing and compliance efforts. Despite their active role in geotechnical engineering, it is one of many services they offer, which may affect their positioning in a list focused solely on top geotechnical firms.


10. 7NT Engineering

  • Website: 7nteng.com
  • Ownership type: Private
  • Headquarters: Dayton, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2008
  • Headcount: 11-50
  • LinkedIn: 7nt-engineering

7NT Engineering, founded in 2008 and based in Dayton, Ohio, is a private engineering firm that specializes in geotechnical services and construction. With a team of 34 employees, the company focuses on providing essential drilling, inspection, engineering, and laboratory testing services primarily for large-scale infrastructure projects. Their work is particularly significant in the water and wastewater management sectors, where they contribute to the design and construction of deep tunnels used for storage and transportation. The firm has built a reputation for delivering precise geotechnical data, which is crucial for the successful execution of complex projects. 7NT Engineering has participated in numerous high-profile projects, showcasing their capability to handle tight timelines and demanding specifications. Their commitment to integrity, reliability, and performance is evident in their client relationships and project outcomes.


11. GRL Engineers, Inc.

  • Website: grlengineers.com
  • Ownership type: Private
  • Headquarters: Solon, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1976
  • Headcount: 11-50
  • LinkedIn: grl-engineers-inc

GRL Engineers, Inc., based in Solon, Ohio, is a professional engineering firm that specializes in deep foundation testing and consulting services. Founded in 1976, the company has built a reputation for providing a wide range of services, including load testing, integrity evaluation, and wave equation analysis. Their work is essential for construction and civil engineering firms, ensuring the safety and effectiveness of foundation systems across various projects. GRL Engineers operates the largest dynamic pile testing firm in the world and is recognized for its advanced testing methods, such as Thermal Integrity Profiling and Bi-Directional Static Load Testing. The firm employs a team of highly skilled engineers, many of whom have achieved advanced proficiency in dynamic measurement and analysis. Their commitment to quality and innovation has made them a trusted partner in the deep foundation industry.


12. Resource International, Inc.


Resource International, Inc. (Rii) is a consulting and engineering services firm based in Columbus, Ohio, established in 1973. The company specializes in providing high-quality solutions for infrastructure improvement, serving both public and private clients across various sectors, including healthcare, education, and transportation. Rii offers a range of services, prominently featuring geotechnical and material engineering, which is critical for assessing soil and material properties in construction projects. Their expertise extends to construction management, environmental assessments, and innovative technologies such as ground penetrating radar. Rii has built a reputation for delivering effective and efficient project solutions, supported by a team of experienced professionals who have often spent their entire careers with the firm. This stability fosters a collaborative environment that enhances project outcomes. Rii's commitment to quality is underscored by its ISO 9001:2015 certification, ensuring adherence to high standards in service delivery. The firm has also received recognition for its contributions to the industry, including awards for environmental excellence and innovative construction methodologies.


13. Wertz Geotechnical Engineering, Inc.

  • Website: wertzgeo.com
  • Ownership type: Private
  • Headquarters: Doylestown, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2018
  • Headcount: 11-50
  • LinkedIn: wertzgeotechnical

Wertz Geotechnical Engineering, Inc. is a consulting firm based in Doylestown, Ohio, specializing in geotechnical engineering, construction materials testing, and subsurface exploration. Founded in 2018, the company has quickly established itself as a reliable partner for clients in the construction and engineering sectors. With a team of experienced engineers, geoscientists, and technicians, Wertz Geotechnical Engineering focuses on delivering tailored solutions to address complex soil and site issues. Their services include a wide range of geotechnical analyses, field and laboratory testing, and special inspections, ensuring that projects meet safety and compliance standards. The firm operates with a commitment to quality and professionalism, making it a valuable resource for clients looking for expertise in geotechnical challenges.


14. Civil Solutions


Civil Solutions, based in Cincinnati, Ohio, is a private engineering firm founded in 2011. The company specializes in civil and geotechnical engineering services, providing a range of solutions that include construction management, emergency restoration, and engineering design. With a team of skilled professionals, Civil Solutions addresses complex engineering challenges, particularly in the construction and real estate sectors. Their services cover critical areas such as foundation design, temporary earth retention, and landslide remediation. The firm prides itself on delivering projects that meet client expectations in terms of safety, budget, and timeline. Civil Solutions has built a reputation for honest advice and creative problem-solving, making them a notable player in the geotechnical engineering field.


15. CDS Associates, Inc.

  • Website: cds-assoc.com
  • Ownership type: Private
  • Headquarters: Cincinnati, Ohio, United States (USA)
  • Founded year: 1968
  • Headcount: 51-200
  • LinkedIn: cds-associates-inc.

CDS Associates, Inc., also known as CT Consultants, is a private consulting firm based in Cincinnati, Ohio, founded in 1968. The company specializes in a range of services including engineering, architecture, planning, and construction. Among its offerings, geotechnical engineering plays a significant role, addressing the needs of various sectors such as government, healthcare, and land development. CT Consultants is dedicated to fostering long-term relationships with clients, which enhances their ability to deliver tailored solutions. Their commitment to project management and environmental assessments further underscores their expertise in navigating complex engineering challenges. With a workforce of 51-200 employees, the firm continues to grow and adapt to the evolving demands of the industry.


16. Natural Resources Management, LLC


Natural Resources Management, LLC (NRM) is a private environmental consulting firm based in Sylvania, Ohio, established in 2007. The company specializes in geological and environmental services, primarily catering to the mining sector, site development firms, and various private entities. NRM's offerings include environmental compliance solutions, resource management, and wastewater treatment. They are particularly noted for their expertise in hydrogeologic modeling, mineral evaluations, and environmental permitting. With a team boasting over 50 years of combined experience, NRM operates across North America, focusing on sustainable practices and adherence to regulatory standards. Their involvement in the mining industry includes conducting geological assessments, sampling, and drilling, as well as providing support for environmental impact assessments. NRM also collaborates with state and federal agencies, ensuring that their projects meet necessary compliance requirements. The firm has established itself as a reliable partner for clients seeking to navigate the complexities of environmental regulations and resource management.


17. Goettle

  • Website: goettle.com
  • Ownership type: Private
  • Headquarters: Cincinnati, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1956
  • Headcount: 201-500
  • LinkedIn: goettleconstruction

Goettle, founded in 1956 and based in Cincinnati, Ohio, is a private construction services company that specializes in geotechnical engineering. With a workforce of approximately 123 employees, Goettle has built a strong presence in the industry over the past 65 years. The company offers a wide range of services, including deep foundations, earth retention systems, and marine construction, catering primarily to businesses and organizations in the construction sector. Their expertise in various foundation techniques, such as augercast piles, driven piles, and drilled piers, allows them to address the unique challenges posed by different soil and rock conditions. Goettle is committed to safety and quality, employing certified specialists and adhering to rigorous safety standards. Their employee ownership model fosters a culture of accountability and dedication, ensuring that projects are executed with precision and care. Goettle's portfolio includes significant projects across the United States, showcasing their capability to handle complex infrastructure needs.


18. Kwest Group

  • Website: kwestgroup.com
  • Ownership type: Private
  • Headquarters: Perrysburg, Ohio, United States (USA)
  • Employee distribution: United States (USA) 98%, Other 2%
  • Founded year: 2002
  • Headcount: 201-500
  • LinkedIn: kwest-group

Kwest Group, founded in 2002 and based in Perrysburg, Ohio, is a private construction and environmental services company. With a workforce of approximately 158 employees, Kwest specializes in civil construction projects across multiple sectors, including energy, petrochemical, rail, and federal/public works. Their service offerings are extensive, covering site grading, erosion control, underground utilities, and structural concrete, among others. Kwest Group is particularly noted for its expertise in managing complex civil construction projects, which often involve significant geotechnical considerations. The company emphasizes safety and quality, having received numerous awards for its performance in these areas. Kwest Group operates in nearly 40 states and the Caribbean, showcasing its broad geographic reach and commitment to serving both public and private sector clients.


19. Hammontree & Associates, Limited


Hammontree & Associates, Limited is a private engineering and surveying firm based in North Canton, Ohio, with a history dating back to 1966. The company provides a wide array of services, including civil engineering, environmental assessments, municipal engineering, and surveying. They cater to both municipalities and private developers, focusing on project planning and execution. Their service offerings include soil evaluations, which are critical for geotechnical engineering, as well as environmental site assessments and transportation infrastructure projects. Hammontree operates primarily in Ohio and Pennsylvania, and their team consists of professionally registered engineers and surveyors. The firm emphasizes meeting project deadlines and budgets, ensuring that client goals are achieved effectively. They have also been involved in various award-winning projects, further establishing their reputation in the engineering sector.


20. Ijus LLC

  • Website: ijus.net
  • Ownership type: Corporate
  • Headquarters: Columbus, Ohio, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: October 2018
  • Founded year: 2005
  • Headcount: 201-500
  • LinkedIn: ijus

Ijus LLC, based in Columbus, Ohio, is a corporate entity that operates as part of TRC Companies, Inc., a consulting and engineering firm established in 2005. The company specializes in a wide array of professional services, including environmental consulting, construction management, and engineering solutions. Ijus LLC serves both government and private sector clients, assisting them in navigating complex projects and ensuring compliance with industry standards. Within its engineering services, Ijus LLC offers geotechnical engineering, which involves analyzing soil and rock conditions to inform construction practices. This capability is crucial for projects that require a solid understanding of subsurface conditions. The firm has built a reputation for delivering innovative and sustainable solutions across various sectors, although it does not appear to have received any recent funding, indicating a stable operational status without external financial backing.


21. Beaver Excavating Company


Beaver Excavating Company, based in Canton, Ohio, has been a significant player in the construction sector since its establishment in 1953. With a workforce of approximately 310 employees, the company focuses on civil construction services, including mass excavation, infrastructure development, and environmental services. They cater primarily to commercial and industrial clients, providing essential solutions for various projects. Notably, Beaver Excavating offers specialized services in geotechnical construction, which includes soil stabilization and deep dynamic compaction. Their commitment to safety and quality is evident in their operational practices and the numerous awards they have received for safety excellence. The company also emphasizes community service, actively participating in local initiatives and contributing to various charitable organizations. This blend of technical expertise and community involvement positions Beaver Excavating as a reputable firm in the construction and geotechnical engineering sectors.


22. 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, founded in 1946 and based in Columbus, Ohio, is a private architecture and engineering firm with a workforce of approximately 859 employees. The company provides a wide array of professional services, including architecture, environmental consulting, construction management, and notably, geotechnical engineering. DLZ serves local governments and commercial clients, assisting them in navigating regulatory requirements and improving infrastructure. Their geotechnical services include engineering, explorations, and drilling, which are essential for assessing soil and site conditions for construction projects. DLZ's multidisciplinary approach ensures that they can tailor solutions to meet the specific needs of their clients, making them a valuable partner in various projects. The firm has received recognition for its work, including being named among Central Ohio's fastest-growing firms and ranking in the Top 500 Design Firms by Engineering News-Record.


23. Robbins

  • Website: robbinstbm.com
  • Ownership type: Corporate
  • Headquarters: Solon, Ohio, United States (USA)
  • Employee distribution: India 43%, United States (USA) 26%, China 16%, Other 15%
  • Latest funding: November 2012
  • Founded year: 1952
  • Headcount: 501-1000
  • LinkedIn: the-robbins-company

Robbins, founded in 1952 and based in Solon, Ohio, specializes in the design and manufacture of tunneling equipment. The company is particularly recognized for its advanced Tunnel Boring Machines (TBMs), which are engineered to tackle a wide range of geological challenges. Robbins' product lineup includes various types of TBMs, small boring machines, and conveyor systems, all aimed at enhancing excavation efficiency in large-scale infrastructure projects. Their equipment has been utilized in numerous significant projects worldwide, showcasing their capability to adapt to different geological conditions. Robbins also provides comprehensive support services, including equipment rental, spare parts, and technical assistance, ensuring that clients can maximize the performance of their machinery. With a workforce distributed across several countries, Robbins maintains a global presence in the tunneling industry, contributing to major infrastructure developments.


24. Precision Blasting Services


Precision Blasting Services (PBS), based in Cleveland, Ohio, has been a significant player in the blasting industry since its founding in 1973. The company specializes in providing technical blasting solutions tailored for the construction and mining sectors. With a workforce of 11 to 50 employees, PBS has built a reputation for its expertise in mine blasting, construction blasting, and blast engineering. Their services are designed to optimize safety, efficiency, and compliance with regulatory standards. PBS has worked on projects across the globe, demonstrating their capability in handling complex blasting operations in various environments. The company is particularly noted for its innovative approaches, including the use of advanced technology for seismic monitoring and blast effects analysis. Under the leadership of Dr. Anthony Konya, who took over in 2019, PBS continues to push the boundaries of blast engineering, ensuring that their solutions meet the evolving needs of their clients while minimizing environmental impact. Their commitment to research and development has positioned them as a knowledgeable partner in the industry, capable of addressing the unique challenges faced in geotechnical projects.



Geotechnical Engineering Insights: Key Companies in Ohio


CompanyHeadquarterSizeFoundedOwnership
Geo-SciBerea, Ohio, United States (USA)11-501996Private
Geotechnical Consultants, Inc.Westerville, Ohio, United States (USA)51-2001979Private
National Engineering & Architectural Services Inc.Columbus, Ohio, United States (USA)51-2001992Private
CT Consultants, A Verdantas CompanyMentor, Ohio, United States (USA)201-5001922Private
Bowser-Morner, Inc.Dayton, Ohio, United States (USA)51-2001911Private
CTL Engineering, Inc.Columbus, Ohio, United States (USA)201-5001927Private
Soil Testing & Engineering, Ltd.Dublin, Ohio, United States (USA)11-501999Private
The Mannik & Smith Group, Inc.Maumee, Ohio, United States (USA)501-10001955Private Equity
CBC Engineers & Associates, LtdCenterville, Ohio, United States (USA)51-2001995Private
7NT EngineeringDayton, Ohio, United States (USA)11-502008Private
GRL Engineers, Inc.Solon, Ohio, United States (USA)11-501976Private
Resource International, Inc.Columbus, Ohio, United States (USA)51-2001973Private
Wertz Geotechnical Engineering, Inc.Doylestown, Ohio, United States (USA)11-502018Private
Civil SolutionsCincinnati, Ohio, United States (USA)11-502011Private
CDS Associates, Inc.Cincinnati, Ohio, United States (USA)51-2001968Private
Natural Resources Management, LLCSylvania, Ohio, United States (USA)1-102007Private
GoettleCincinnati, Ohio, United States (USA)201-5001956Private
Kwest GroupPerrysburg, Ohio, United States (USA)201-5002002Private
Hammontree & Associates, LimitedNorth, Ohio, United States (USA)51-2001966Private
Ijus LLCColumbus, Ohio, United States (USA)201-5002005Corporate
Beaver Excavating CompanyCanton, Ohio, United States (USA)501-10001953Private
DLZ CorporationColumbus, Ohio, United States (USA)501-10001946Private
RobbinsSolon, Ohio, United States (USA)501-10001952Corporate
Precision Blasting ServicesCleveland, Ohio, United States (USA)11-501973Private


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