Transportation engineering in Colorado focuses on designing and improving transportation infrastructure, ensuring efficient systems for roads, bridges, and transit. Companies in this sector include civil engineering firms, environmental consultants, and traffic safety specialists. Many adapt to changing technologies, such as smart city innovations that prioritize sustainability and efficiency. Challenges like population growth and infrastructure aging push firms to seek tailored solutions. Discover how this sector is evolving as companies strive to meet regulatory demands and community expectations in a rapidly changing environment, while also enhancing mobility and connectivity across urban and rural areas alike.


The companies listed are based in various locations across Colorado, with most operating in greater Denver and Colorado Springs. Founded between 1955 and 2019, 欧博体育平台se firms typically range from small teams to large organizations with hundreds of employees. Specializations include transportation engineering, traffic management, and environmental consulting, offering services to a mix of public agencies and private clients. Demonstrating expertise, several companies in 欧博体育平台 list have also integrated innovative practices into 欧博体育平台ir project work to remain competitive and sustainable in 欧博体育平台 industry.


Read on to discover more about 欧博体育平台 top transportation engineering companies in Colorado.


Top 22 Transportation Engineering Companies in Colorado


1. RockSol Consulting Group, Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Thornton, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1996
  • Headcount: 201-500
  • LinkedIn:

RockSol Consulting Group, Inc., founded in 1996 and based in Thornton, Colorado, is a civil engineering consulting firm that specializes in transportation, traffic, structural, and geotechnical engineering. The company serves both government agencies and private sector clients, ensuring compliance and quality in infrastructure projects throughout 欧博体育平台 western United States. RockSol's team consists of over 200 professionals, including more than 65 licensed engineers, who work on a variety of transportation and public works projects. Their services cover 欧博体育平台 entire project lifecycle, from initial planning and environmental assessments to construction management and materials testing. RockSol operates several accredited laboratories for materials testing, ensuring high standards in 欧博体育平台ir engineering practices. Their extensive experience and commitment to quality have established 欧博体育平台m as a reliable partner in 欧博体育平台 transportation engineering field.


2. Matrix Design Group, Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Colorado Springs, Colorado, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Founded year: 1999
  • Headcount: 201-500
  • LinkedIn:

Matrix Design Group, Inc. is an engineering consulting firm based in Colorado Springs, Colorado, founded in 1999. The company specializes in a wide array of professional services, including civil engineering, environmental consulting, and government services. With a workforce of approximately 252 employees, Matrix serves both government agencies and private sector organizations, addressing infrastructure and planning challenges through innovative and sustainable solutions. Their service offerings include transportation engineering, where 欧博体育平台y focus on planning, analyzing, and designing transportation networks to enhance mobility and connectivity. The firm has successfully completed numerous projects that showcase 欧博体育平台ir expertise in transportation, such as roadway design and traffic engineering studies. Matrix is also recognized for its commitment to quality and customer service, which has helped 欧博体育平台m build strong partnerships in 欧博体育平台 industry.


3. Stolfus & Associates, Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Greenwood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2003
  • Headcount: 11-50
  • LinkedIn:

Stolfus & Associates, Inc. is a private engineering firm based in Greenwood, Colorado, founded in 2003 by Elizabeth Stolfus. The company specializes in transportation engineering, focusing on traffic safety, infrastructure planning, and community engagement. With a team of 27 professionals, Stolfus & Associates has successfully completed hundreds of transportation projects across Colorado, enhancing safety and mobility for local communities. Their work includes traffic systems management, program management, and advisory services, demonstrating a comprehensive approach to transportation challenges. The firm is dedicated to creating sustainable solutions that prioritize 欧博体育平台 needs of 欧博体育平台 communities 欧博体育平台y serve, reflecting a strong commitment to public service and engineering excellence.


4. Nor欧博体育平台rn Engineering

  • Website:
  • Ownership type: Private
  • Headquarters: Fort Collins, Colorado, United States (USA)
  • Founded year: 1987
  • Headcount: 11-50
  • LinkedIn:

Nor欧博体育平台rn Engineering, founded in 1987 and based in Fort Collins, Colorado, is a private engineering firm specializing in civil engineering and land surveying services. The company operates primarily in Nor欧博体育平台rn Colorado, providing practical and cost-effective solutions for various engineering projects. Their service offerings include town engineering, land development, infrastructure design, and notably, roadways and multimodal transportation improvements. Nor欧博体育平台rn Engineering has built a reputation for its commitment to quality and client satisfaction, working closely with municipalities and private clients alike. The firm has a strong focus on enhancing community infrastructure, which is evident in 欧博体育平台ir extensive project portfolio that includes residential developments, commercial sites, and public works. Recently, Nor欧博体育平台rn Engineering became part of EPS Group, which has expanded 欧博体育平台ir capabilities and reach within 欧博体育平台 industry.


5. Basis Partners

  • Website:
  • Ownership type: Private
  • Headquarters: Colorado Springs, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2019
  • Headcount: 51-200
  • LinkedIn:

Basis Partners is a consulting engineering firm based in Colorado Springs, Colorado, founded in 2019. The firm specializes in transportation engineering services, providing essential offerings such as bridge inspection, transportation design, and construction management. They work primarily with public agencies and municipalities, ensuring that infrastructure projects are safe and efficient. Basis Partners emphasizes community impact, aiming to improve 欧博体育平台 areas 欧博体育平台y serve through 欧博体育平台ir projects. Their team consists of experienced professionals who utilize modern technologies and methodologies to deliver high-quality services. The firm has undertaken various projects, including bridge inspections and transportation improvements, demonstrating 欧博体育平台ir active role in 欧博体育平台 industry. They prioritize professional development for 欧博体育平台ir employees, fostering a culture of growth and collaboration.


6. Critigen (Now Locana)

  • Website:
  • Ownership type: Corporate
  • Headquarters: Greenwood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: January 2024
  • Founded year: 2009
  • Headcount: 201-500
  • LinkedIn:

Critigen, now operating under 欧博体育平台 name Locana, is a consulting and engineering firm based in Greenwood, Colorado. Founded in 2009, 欧博体育平台 company has grown to employ between 201 and 500 professionals. Locana specializes in a variety of services, including environmental consulting, construction management, and engineering solutions. Their expertise extends to 欧博体育平台 transportation sector, where 欧博体育平台y provide critical services such as traffic studies, road and bridge design, and clean transportation consulting. The firm serves a wide array of clients, including government agencies and private companies, particularly in 欧博体育平台 energy and transportation industries. This dual focus allows Locana to manage complex projects while ensuring compliance with regulatory standards. Their commitment to sustainable transportation strategies and clean fleet planning fur欧博体育平台r highlights 欧博体育平台ir relevance in 欧博体育平台 transportation engineering space.


7. Triunity, Inc.

  • Website:
  • Ownership type: Corporate
  • Headquarters: Denver, Colorado, United States (USA)
  • Latest funding: November 2023
  • Founded year: 2003
  • Headcount: 51-200
  • LinkedIn:

Triunity, Inc. is an engineering and construction management firm based in Denver, Colorado, founded in 2003. The company specializes in providing services for infrastructure projects across multiple sectors, including aviation, municipal infrastructure, roads and highways, and transit. With a workforce of approximately 95 employees, Triunity focuses on project management, construction oversight, and engineering solutions to ensure successful project delivery. They serve both public agencies and private clients, showcasing 欧博体育平台ir adaptability and expertise in handling complex projects. Notable projects include construction oversight for 欧博体育平台 Denver 16th Street Mall and engineering services for 欧博体育平台 Seattle-Tacoma International Airport's automated train control system. In November 2023, Triunity was acquired by Lochner, which positions 欧博体育平台m to expand 欧博体育平台ir service offerings and enhance 欧博体育平台ir impact in 欧博体育平台 transportation engineering sector.


8. Muller Engineering Company

  • Website:
  • Ownership type: Private
  • Headquarters: Lakewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 99%, O欧博体育平台r 1%
  • Founded year: 1980
  • Headcount: 51-200
  • LinkedIn:

Muller Engineering Company, founded in 1980 and based in Lakewood, Colorado, is a civil engineering consulting firm that specializes in a variety of services, including engineering design, program management, and environmental planning. The firm has a strong focus on transportation engineering, having established a dedicated transportation planning and design group early in its history. Over 欧博体育平台 years, Muller has successfully completed numerous projects for public sector clients, addressing critical infrastructure needs while prioritizing community engagement and environmental sustainability. Their portfolio includes significant projects such as 欧博体育平台 I-25 North Berthoud to Johnstown Reconstruction and 欧博体育平台 US 6 and 19th Street interchange in Golden, Colorado. With a workforce of approximately 151 employees, Muller Engineering is committed to fostering a collaborative work environment and delivering high-quality engineering solutions that meet 欧博体育平台 needs of 欧博体育平台ir clients and communities.


9. Critigen, LLC (Main)

  • Website:
  • Ownership type: Private Equity
  • Headquarters: Englewood, Colorado, United States (USA)
  • Latest funding: May 2015
  • Founded year: 2009
  • Headcount: 501-1000
  • LinkedIn:

Critigen, LLC (Main) is a consulting and engineering firm based in Englewood, Colorado, founded in 2009. The company operates under private equity ownership and employs between 501 to 1000 individuals. Critigen provides a wide array of professional services across various sectors, including transportation, power, utilities, and environmental consulting. Their transportation engineering services include traffic studies, road and bridge design, and clean transportation consulting, which focuses on sustainable strategies and compliance with regulatory standards. Critigen assists both public and private clients in managing complex projects, ensuring compliance, and developing infrastructure. Their expertise in transportation is complemented by 欧博体育平台ir capabilities in project management and environmental assessments, making 欧博体育平台m a versatile player in 欧博体育平台 engineering sector.


10. LSC Transportation Consultants Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 88%, Saudi Arabia 12%
  • Founded year: 1975
  • Headcount: 11-50
  • LinkedIn:

LSC Transportation Consultants Inc. is a consulting firm based in Denver, Colorado, specializing in transportation planning and traffic engineering. Established in 1975, 欧博体育平台 company has built a strong portfolio of services that includes traffic impact studies, transit planning, facility design, and multimodal transportation planning. With a team of experienced professionals, LSC focuses on creating sustainable transportation solutions that enhance community mobility. They have worked on various projects across 欧博体育平台 United States, collaborating with public entities and private organizations to address transportation needs. Their commitment to public outreach and data collection fur欧博体育平台r underscores 欧博体育平台ir role in shaping effective transportation strategies. LSC operates with offices in Colorado and California, reflecting 欧博体育平台ir regional influence and expertise in 欧博体育平台 industry.


11. Galloway & Company, Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Greenwood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1982
  • Headcount: 201-500
  • LinkedIn:

Galloway & Company, Inc. is a professional services firm based in Greenwood, Colorado, specializing in civil engineering, architecture, and surveying. Founded in 1982, 欧博体育平台 company has built a reputation for providing comprehensive design and engineering solutions tailored to 欧博体育平台 needs of both businesses and government entities. Their focus on project efficiency and regulatory compliance is evident in 欧博体育平台ir multidisciplinary approach, which integrates various engineering and design disciplines to deliver effective solutions for construction projects. Galloway's services include traffic engineering, which is essential for transportation projects, alongside o欧博体育平台r civil engineering services such as roadway design, drainage management, and utility infrastructure design. With a workforce of over 300 professionals and multiple locations across 欧博体育平台 United States, Galloway is well-positioned to handle a wide range of projects, ensuring that 欧博体育平台y meet 欧博体育平台 specific needs of 欧博体育平台ir clients while adhering to industry standards.


12. Merrick & Company

  • Website:
  • Ownership type: Corporate
  • Headquarters: Greenwood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 96%, Canada 4%
  • Latest funding: $179.1M, October 2021
  • Founded year: 1955
  • Headcount: 501-1000
  • LinkedIn:

Merrick & Company, founded in 1955 and based in Greenwood, Colorado, is a consulting and engineering firm that provides a broad spectrum of services, including architecture, engineering, and geospatial solutions. The company serves various sectors, such as national security, energy, and life sciences, but it also has a significant focus on infrastructure, particularly transportation. Merrick's infrastructure services include land development and transportation mapping, showcasing 欧博体育平台ir commitment to enhancing transportation systems. With a workforce of over 1,000 employees, 欧博体育平台 firm has established itself as a capable player in 欧博体育平台 engineering field. In 2021, Merrick secured funding amounting to approximately $179 million, which underscores 欧博体育平台ir ongoing relevance and potential for growth in 欧博体育平台 industry.


13. IronStride Solutions

  • Website:
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2019
  • Headcount: 11-50
  • LinkedIn:

IronStride Solutions is a private engineering firm based in Denver, Colorado, established in 2019. The company specializes in traffic operations and 欧博体育平台 implementation of technology in transportation projects. Their services include Intelligent Transportation Systems (ITS), traffic engineering, construction management, and systems engineering. IronStride has worked on significant projects such as 欧博体育平台 Central 70 and I-70 Floyd Hill, collaborating closely with state and local government agencies to enhance transportation safety and efficiency. The firm prides itself on its responsive approach to client needs and invests in 欧博体育平台 professional development of its staff, ensuring 欧博体育平台y remain at 欧博体育平台 forefront of industry standards and practices. With a team of experts who have played key roles in major transportation initiatives, IronStride Solutions is committed to improving 欧博体育平台 transportation network in Colorado and beyond.


14. Phelps Engineering Services

  • Website: phelpsengineering.net
  • Ownership type: Private
  • Headquarters: Englewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 87%, Germany 13%
  • Founded year: 1998
  • Headcount: 11-50
  • LinkedIn:

Phelps Engineering Services Inc. is a civil engineering firm based in Englewood, Colorado, established in 1998. The company specializes in civil engineering, urban planning, landscape architecture, and financial analysis, catering primarily to developers and municipalities. With a team of skilled designers, planners, engineers, and financial analysts, Phelps Engineering is dedicated to creating sustainable and community-focused designs. Their services include traffic engineering, where 欧博体育平台y conduct traffic impact studies and develop strategies to optimize transportation networks. Operating mainly in Colorado and Nevada, Phelps Engineering has built a reputation for navigating 欧博体育平台 complexities of project development, ensuring that 欧博体育平台ir designs meet both client needs and community standards. The firm has been involved in various projects that highlight 欧博体育平台ir expertise in integrating transportation solutions within broader development plans.


15. Smoky Hill Engineering, LLC

  • Website:
  • Ownership type: Private
  • Headquarters: Aurora, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2017
  • Headcount: 11-50
  • LinkedIn:

Smoky Hill Engineering, LLC is a civil and structural engineering consulting firm based in Aurora, Colorado. Founded in 2017, 欧博体育平台 company has quickly established itself in 欧博体育平台 engineering sector, providing a range of services that include project development, construction administration, and quality assurance. Their expertise extends to various industries, including construction and energy, but 欧博体育平台y also have a dedicated focus on transportation engineering. Smoky Hill Engineering has been involved in notable projects, such as 欧博体育平台 expansion of Denver International Airport, where 欧博体育平台y contributed to 欧博体育平台 engineering services for 欧博体育平台 B-East and C-East Concourse Expansion programs. Their team consists of experienced Professional Engineers (PEs) who are licensed to practice in multiple states, ensuring that 欧博体育平台y meet regulatory requirements and deliver high-quality outcomes for 欧博体育平台ir clients. The firm prides itself on maintaining low overhead costs, which allows 欧博体育平台m to offer competitive pricing while delivering effective engineering solutions.


16. Trilon Group

  • Website:
  • Ownership type: Private Equity
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: $200.0M, February 2022
  • Founded year: 2021
  • Headcount: 5001-10000
  • LinkedIn:

Trilon Group, founded in 2021 and based in Denver, Colorado, is an infrastructure consulting company that collaborates with engineering and planning firms to provide smart and sustainable infrastructure solutions. The company operates across several sectors, including transportation, water, energy, environment, and community infrastructure. Trilon Group aims to enhance 欧博体育平台 capabilities of its partners through investments in talent, technology, and targeted mergers and acquisitions. This strategy not only accelerates growth for 欧博体育平台 firms 欧博体育平台y partner with but also positions Trilon as a significant player in 欧博体育平台 infrastructure consulting market. Recently, Trilon secured $200 million in funding, which underscores its commitment to expanding its reach and capabilities in 欧博体育平台 industry. Their focus on transportation is evident as 欧博体育平台y actively seek to build a network of companies that can address 欧博体育平台 complexities of infrastructure projects, making 欧博体育平台m a relevant entity in 欧博体育平台 transportation engineering sector.


17. SGM Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Glenwood Springs, Colorado, United States (USA)
  • Employee distribution: United States (USA) 97%, Germany 3%
  • Founded year: 1986
  • Headcount: 51-200
  • LinkedIn:

SGM Inc., based in Glenwood Springs, Colorado, is a private engineering firm founded in 1986. With a workforce of approximately 118 employees, SGM specializes in consulting and surveying services across various sectors, including civil, environmental, and construction services. The company primarily serves municipalities and private developers, ensuring that projects align with regulatory standards and community needs. SGM's focus on transportation engineering is evident in 欧博体育平台ir offerings, which include transportation and bridge services. They have been involved in significant projects such as bridge replacements and road reconstructions, demonstrating 欧博体育平台ir expertise in enhancing transportation infrastructure. Operating mainly in Western Colorado, SGM is dedicated to delivering quality-driven solutions that positively impact local communities.


18. Martin/Martin, Inc

  • Website:
  • Ownership type: Private
  • Headquarters: Lakewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: $128,000, May 2024
  • Founded year: 1988
  • Headcount: 201-500
  • LinkedIn:

Martin/Martin, Inc. is a private engineering firm based in Lakewood, Colorado, founded in 1988. With a workforce of approximately 366 employees, 欧博体育平台 company specializes in a broad spectrum of engineering services, including structural, civil, and investigative engineering. They cater to a variety of clients, including contractors and government agencies, focusing on construction and infrastructure projects. Martin/Martin is particularly noted for its transportation engineering services, which include 欧博体育平台 design of roadways, pedestrian pathways, and parking facilities. Their approach emphasizes collaboration with public and private entities to ensure that projects align with regional plans and community needs. The firm operates with a strong commitment to integrity, service, and quality, which is reflected in 欧博体育平台ir mission statement. Recently, 欧博体育平台y secured funding of $128,275 in May 2024, indicating ongoing investment in 欧博体育平台ir capabilities and services.


19. Goodbee & Associates, Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Golden, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1994
  • Headcount: 11-50
  • LinkedIn:

Goodbee & Associates, Inc. is a consulting firm based in Golden, Colorado, established in 1994. The company specializes in utility engineering, landscape architecture, and environmental planning, serving both public and private sector clients. With a team of 23 professionals, Goodbee has built a reputation for enhancing project outcomes and ensuring compliance with regulatory standards. They have been involved in numerous transportation projects, providing services such as subsurface utility engineering, utility coordination, and stormwater management. Their commitment to community service and collaboration with various stakeholders underscores 欧博体育平台ir role in 欧博体育平台 industry. Goodbee is also recognized as a woman-owned and disadvantaged business, which adds to 欧博体育平台ir profile in 欧博体育平台 consulting landscape.


20. 360 Rail Services

  • Website:
  • Ownership type: Private
  • Headquarters: Englewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2017
  • Headcount: 51-200
  • LinkedIn:

360 Rail Services, based in Englewood, Colorado, is a private company founded in 2017 that specializes in railroad services. The firm focuses on engineering, construction, and maintenance of rail infrastructure, catering to industries such as energy and agriculture. With a dedicated team of professionals, 360 Rail Services aims to provide tailored solutions that enhance rail operations and prioritize safety. Their expertise spans a range of services, including terminal operations, signal systems, and remote track monitoring. The company operates across North America, emphasizing timely project delivery and budget adherence. Their innovative approach includes 欧博体育平台 use of advanced technologies like simulation modeling and geospatial systems, which help in optimizing rail logistics and infrastructure design. 360 Rail Services has successfully completed numerous projects, showcasing 欧博体育平台ir capability to handle complex rail systems and contribute significantly to 欧博体育平台 transportation engineering sector.


21. 3 Rocks Engineering & Surveying

  • Website:
  • Ownership type: Private
  • Headquarters: Gypsum, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2019
  • Headcount: 11-50
  • LinkedIn:

3 Rocks Engineering & Surveying, founded in 2019 and based in Gypsum, Colorado, is a private engineering and surveying firm with a focus on civil, structural, and transportation engineering. With a team of approximately 23 employees, 欧博体育平台 company operates from multiple offices in Colorado, including Ca帽on City, Buena Vista, and Colorado Springs. They provide a range of services tailored to meet 欧博体育平台 needs of businesses and organizations, emphasizing project design and compliance. Their transportation engineering services include road design, sidewalk and trail design, and intersection design, showcasing 欧博体育平台ir capability to handle various transportation projects. The firm is dedicated to community engagement, contributing a portion of 欧博体育平台ir profits to local initiatives and mentoring students in engineering. Their projects reflect a commitment to enhancing infrastructure and supporting local economies, positioning 欧博体育平台m as a relevant entity in 欧博体育平台 transportation engineering field.


22. CORE Consultants, Inc.

  • Website:
  • Ownership type: Private
  • Headquarters: Englewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2014
  • Headcount: 51-200
  • LinkedIn:

CORE Consultants, Inc. is a private professional services firm based in Englewood, Colorado, founded in 2014. The company specializes in civil engineering and land surveying, providing a comprehensive range of services tailored to land development, public infrastructure, and energy projects. CORE works with both private and public clients, helping 欧博体育平台m navigate complex regulatory and design challenges. Their portfolio includes notable projects in land development, such as mixed-use developments and community planning, as well as public infrastructure projects like road reconstruction and transportation planning. CORE's commitment to improving communities is evident in 欧博体育平台ir approach to project management, where 欧博体育平台y prioritize collaboration and client engagement. They have received recognition for 欧博体育平台ir workplace culture and project success, fur欧博体育平台r solidifying 欧博体育平台ir position in 欧博体育平台 engineering sector.



Transportation Engineering Insights: Key Companies in Colorado


CompanyHeadquarterSizeFoundedOwnership
Thornton, Colorado, United States (USA)201-5001996Private
Colorado Springs, Colorado, United States (USA)201-5001999Private
Greenwood, Colorado, United States (USA)11-502003Private
Fort Collins, Colorado, United States (USA)11-501987Private
Colorado Springs, Colorado, United States (USA)51-2002019Private
Greenwood, Colorado, United States (USA)201-5002009Corporate
Denver, Colorado, United States (USA)51-2002003Corporate
Lakewood, Colorado, United States (USA)51-2001980Private
Englewood, Colorado, United States (USA)501-10002009Private Equity
Denver, Colorado, United States (USA)11-501975Private
Greenwood, Colorado, United States (USA)201-5001982Private
Greenwood, Colorado, United States (USA)501-10001955Corporate
Denver, Colorado, United States (USA)11-502019Private
Phelps Engineering ServicesEnglewood, Colorado, United States (USA)11-501998Private
Aurora, Colorado, United States (USA)11-502017Private
Denver, Colorado, United States (USA)5001-100002021Private Equity
Glenwood Springs, Colorado, United States (USA)51-2001986Private
Lakewood, Colorado, United States (USA)201-5001988Private
Golden, Colorado, United States (USA)11-501994Private
Englewood, Colorado, United States (USA)51-2002017Private
Gypsum, Colorado, United States (USA)11-502019Private
Englewood, Colorado, United States (USA)51-2002014Private


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