Engineering consulting companies in Pennsylvania are vital partners in the development of infrastructure and environmental management. They offer a range of specialized services, including civil, environmental, mechanical, and electrical engineering. These firms are embracing cutting-edge technologies and sustainable practices as they navigate industry shifts driven by climate change and urbanization. Currently, many companies are integrating smart technology and data analytics into their projects for enhanced efficiency and decision-making. The sector is projected to grow as demand for innovative solutions rises in multiple industries including construction, manufacturing, and energy management.

This list highlights 25 prominent engineering consulting companies based in Pennsylvania. These firms vary in size, employing anywhere from 51 to over 5,000 individuals. They span decades of experience, some being founded as early as 1910, while others are relatively new, established in the 2000s. Specialties range from infrastructure development to environmental solutions, demonstrating a focus on significant societal challenges. Major cities such as Pittsburgh and Philadelphia house many of these professionals, amplifying their contributions to regional and national projects.

Continue reading to discover the top engineering consulting companies in Pennsylvania.

Top 25 Engineering Consulting Companies Companies in Pennsylvania

1. Civil & Environmental Consultants, Inc.

• Website: cecinc.com
• Ownership type: Corporate
• Headquarters: Moon Township, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 97%, Other 3%
• Latest funding: December 2023
• Founded year: 1989
• Headcount: 1001-5000
• LinkedIn: civil-%26-environmental-consultants-inc-

Civil & Environmental Consultants, Inc. (CEC) is an engineering and environmental consulting firm headquartered in Moon Township, Pennsylvania. Established in 1989, CEC has grown to employ approximately 2,090 professionals across 34 offices nationwide. The firm specializes in a wide array of services, including air quality assessments, civil engineering, ecological sciences, environmental engineering, and waste management. CEC serves various sectors, notably manufacturing, mining, oil and gas, and public sector clients, addressing complex challenges with integrated solutions. The company emphasizes a client-first approach, ensuring that project goals align with client objectives while maintaining high standards of quality and safety. CEC's commitment to professional development and employee engagement is evident in its employee ownership model, which encourages accountability and fosters a collaborative work environment. Their recent accolades, such as being named a top diversity employer, reflect their dedication to inclusivity and excellence in service delivery.

2. Michael Baker International

• Website: mbakerintl.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 99%
• Founded year: 1940
• Headcount: 1001-5000
• LinkedIn: michael-baker-corporation

Michael Baker International, based in Pittsburgh, Pennsylvania, is a consulting and engineering firm that has been active since 1940. With a workforce of approximately 4,242 employees, the company specializes in a broad spectrum of services including design, planning, and construction management. They primarily serve government clients, tackling intricate infrastructure challenges that enhance community accessibility and sustainability. Their project portfolio spans various sectors, including transportation, environmental restoration, and water management. Notably, Michael Baker has engaged in initiatives that promote social responsibility, such as their collaboration with Bridges to Prosperity, which focuses on building footbridges in underserved areas. This commitment to making a difference in communities reflects their operational ethos and dedication to impactful engineering solutions.

3. Gannett Fleming

• Website: gannettfleming.com
• Ownership type: Private Equity
• Headquarters: Mechanicsburg, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 90%, Canada 10%
• Latest funding: March 2023
• Founded year: 2004
• Headcount: 1001-5000
• LinkedIn: gannett-fleming

Gannett Fleming, founded in 2004 and based in Mechanicsburg, Pennsylvania, is a consulting firm that specializes in architecture, engineering, and construction services. With nearly 3,000 employees, the company provides innovative solutions to a wide range of infrastructure challenges, particularly in transportation, water resources, and energy sectors. Their expertise spans advisory services, engineering, and technology implementation, allowing them to address complex issues faced by government agencies and private sector clients alike. Gannett Fleming emphasizes sustainability and resilience in their projects, reflecting a commitment to addressing the pressing challenges of a changing world. The firm has also recently merged with TranSystems, creating a more formidable presence in the infrastructure consulting market. Their projects include significant undertakings such as dam safety modifications, transportation facility expansions, and water treatment solutions, showcasing their capability to deliver impactful results.

4. Pennoni

• Website: pennoni.com
• Ownership type: Corporate
• Headquarters: Philadelphia, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2015
• Founded year: 1966
• Headcount: 1001-5000
• LinkedIn: pennoni

Pennoni is an engineering consulting firm based in Philadelphia, Pennsylvania, founded in 1966. With a workforce of over 1,200 employees, the company specializes in innovative design and technology solutions aimed at enhancing community infrastructure. They serve a wide range of clients, including government agencies and private developers, addressing challenges in land development and environmental safety. Pennoni has expanded its operations across the East Coast, maintaining a commitment to high-quality consulting services. Their projects include significant infrastructure improvements, environmental assessments, and community-focused developments. The firm is also recognized for its collaborative approach, which fosters partnerships that enhance project outcomes. Pennoni's dedication to innovation is evident in their initiatives like Digital Labs, which focus on integrating new technologies into their engineering practices.

5. McCormick Taylor, Inc.

• Website: mccormicktaylor.com
• Ownership type: Private
• Headquarters: Philadelphia, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1946
• Headcount: 201-500
• LinkedIn: mccormick-taylor-inc-

McCormick Taylor, Inc. is a Philadelphia-based consulting firm that specializes in engineering and planning services. Established in 1946, the company has built a reputation for providing a wide range of services, including construction management, design, environmental studies, and program management. Their expertise is particularly sought after by government agencies and utility companies, who rely on McCormick Taylor for their knowledge in infrastructure development and environmental compliance. The firm operates across various sectors, such as energy, municipal, and community planning, demonstrating their capability to address complex challenges in these areas. With a workforce of approximately 425 employees, McCormick Taylor is well-equipped to manage projects from conception through to completion, ensuring that they meet regulatory requirements and client expectations. Their commitment to fostering relationships with clients and communities further enhances their standing in the industry.

6. McMahon, a Bowman company

• Website: mcmahonassociates.com
• Ownership type: Corporate
• Headquarters: Fort Washington, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 96%, Australia 4%
• Latest funding: $18.5M, May 2022
• Founded year: 1976
• Headcount: 201-500
• LinkedIn: mcmahon-associates-inc-

McMahon, a Bowman company, is an engineering consulting firm based in Fort Washington, Pennsylvania. Established in 1976, the company specializes in a broad spectrum of engineering services, including civil, mechanical, electrical, and plumbing engineering, as well as environmental and construction management. McMahon serves a varied clientele, which includes government entities and private sector organizations, focusing on infrastructure development and management. The firm has a notable presence in the United States, with a small percentage of its operations extending to Australia. Recently, McMahon secured $18.5 million in funding, reflecting its commitment to growth and innovation in the engineering sector. Their expertise spans multiple markets, including transportation, renewable energy, and building infrastructure, positioning them as a significant player in the engineering consulting industry.

7. IPS-Integrated Project Services

• Website: ipsdb.com
• Ownership type: Corporate
• Headquarters: Blue Bell, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 64%, Ireland 9%, United Kingdom (UK) 8%, Other 20%
• Latest funding: November 2015
• Founded year: 1989
• Headcount: 1001-5000
• LinkedIn: ips

IPS-Integrated Project Services, LLC, based in Blue Bell, Pennsylvania, is a project management and consulting firm that specializes in architecture, engineering, and construction services. Founded in 1989, IPS has carved out a niche in the life sciences and manufacturing sectors, providing integrated solutions for complex projects. The company operates globally, with a workforce of over 3,300 employees across 45 offices in 17 countries. IPS is recognized for its expertise in EPCMV (Engineering, Procurement, Construction Management, and Validation) services, which are tailored to meet the specific needs of its clients. The firm has also made significant strides in enhancing its service offerings through strategic acquisitions, including the purchase of Linesight, a multinational consulting firm, which expanded its construction consultancy capabilities. IPS's commitment to safety and sustainability is evident in its Mission Zero Safety Program, which aims for a zero-accident workplace. This focus on safety, combined with their technical expertise, positions IPS as a key player in the engineering consulting industry.

8. Urban Engineers

• Website: urbanengineers.com
• Ownership type: Corporate
• Headquarters: Philadelphia, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 99%
• Latest funding: June 2024
• Founded year: 1960
• Headcount: 201-500
• LinkedIn: urban-engineers-inc-

Urban Engineers, based in Philadelphia, Pennsylvania, is an engineering firm that has been operational since 1960. With a workforce of approximately 449 employees, the company offers a wide array of services that include design, environmental assessments, construction management, and program management. They cater to a variety of sectors, working with both government entities and private developers. Urban Engineers is particularly focused on addressing infrastructure challenges and ensuring compliance with environmental regulations. Their project portfolio spans multiple markets, including transportation, public spaces, and flood protection, reflecting their capability to tackle complex engineering issues. The firm also emphasizes sustainability and climate resilience in its projects, which is crucial in today's environment. Urban Engineers has not reported any recent funding, indicating a stable operational model without reliance on external financial support.

9. Burns Engineering, Inc.

• Website: burns-group.com
• Ownership type: Private
• Headquarters: Philadelphia, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1960
• Headcount: 201-500
• LinkedIn: the-burns-group

Burns Engineering, Inc., based in Philadelphia, Pennsylvania, has been a prominent player in the engineering consulting sector since its inception in 1960. The firm specializes in providing innovative engineering solutions for mission-critical facilities, catering to sectors such as aviation, healthcare, and public works. With a workforce of approximately 360 employees, Burns Engineering offers a comprehensive suite of services, including mechanical and electrical engineering, security design, and energy solutions. Their project portfolio showcases their expertise in managing complex infrastructure challenges, such as the development of major transportation hubs and energy-efficient systems. Recognized as an ENR Top 500 Design Firm, Burns Engineering has built a reputation for outstanding client service and technical excellence, making them a significant contributor to the engineering consulting industry.

10. GAI Consultants, Inc.

• Website: gaiconsultants.com
• Ownership type: Private Equity
• Headquarters: Homestead, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: October 2022
• Founded year: 1958
• Headcount: 501-1000
• LinkedIn: gai-consultants-inc-

GAI Consultants, Inc. is a consulting firm based in Homestead, Pennsylvania, specializing in engineering, planning, and environmental services. Established in 1958, GAI has built a robust portfolio that addresses infrastructure and environmental challenges across various sectors. Their services include abandoned mine land reclamation, environmental engineering, transportation, and urban design, among others. GAI's commitment to sustainable practices is evident in their project approach, which emphasizes efficiency and community impact. The firm has worked with both government and private clients, ensuring a broad reach in the consulting market. GAI's expertise in navigating complex regulatory environments and their focus on community solutions further enhance their standing in the industry.

11. Rettew

• Website: rettew.com
• Ownership type: Private
• Headquarters: Lancaster, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1969
• Headcount: 201-500
• LinkedIn: rettew-associates-inc-

Rettew is an engineering consulting and construction services firm based in Lancaster, Pennsylvania. Established in 1969, the company has grown to employ over 300 professionals who specialize in a wide array of services across multiple sectors. Rettew's expertise spans environmental consulting, infrastructure development, and project management, allowing them to assist clients in navigating complex regulatory landscapes and project requirements. Their service offerings include bridges and structures, environmental compliance, geotechnical services, and construction management. Rettew has built a reputation for delivering projects on time and within budget, often exceeding client expectations. The firm is particularly noted for its innovative projects, such as the development of floating solar installations, which highlight their commitment to sustainable solutions. Rettew's collaborative approach ensures that they work closely with clients to meet their specific needs, making them a trusted partner in the engineering consulting industry.

12. Bala Consulting Engineers

• Website: bala.com
• Ownership type: Private
• Headquarters: Wayne, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1982
• Headcount: 51-200
• LinkedIn: bala-consulting-engineers

Bala Consulting Engineers, based in Wayne, Pennsylvania, is a private engineering firm that has been operational since 1982. The company specializes in a range of engineering services, including mechanical, electrical, structural, technology, commissioning, and sustainability engineering. Bala serves a variety of clients, including developers, corporations, and institutions, helping them design and implement efficient and sustainable solutions for their construction projects. With a workforce of approximately 239 employees, Bala operates multiple offices in key cities such as Philadelphia, New York, Boston, Baltimore, and Washington, D.C. The firm is dedicated to innovative design practices and has a strong focus on sustainability, actively participating in initiatives like the MEP 2040 Challenge to address carbon impacts in their designs. Bala's commitment to community involvement and social responsibility is evident in their culture, which emphasizes relationships and philanthropy. This holistic approach to engineering consulting positions Bala as a significant player in the industry.

13. Buchart Horn, Inc.

• Website: bucharthorn.com
• Ownership type: Private
• Headquarters: York, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1945
• Headcount: 201-500
• LinkedIn: buchart-horn-inc-

Buchart Horn, Inc. is a professional services firm based in York, Pennsylvania, specializing in engineering, architecture, and planning. Established in 1945, the company has built a reputation for providing comprehensive solutions in water resources, transportation, and building systems. They serve a wide range of clients, including local, state, and federal government entities, as well as private sector organizations. Buchart Horn is known for its commitment to sustainability and community involvement, ensuring that their projects not only meet client needs but also contribute positively to the environment and society. The firm operates through a collaborative approach, which fosters innovation and efficiency in project development. With a workforce of 201-500 employees, Buchart Horn maintains a strong presence in the engineering consulting sector, supported by a high rate of repeat business from satisfied clients. Their international operations, including an office in Germany, further demonstrate their capability to engage in global projects.

14. Rizzo International

• Website: rizzointl.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 93%, Other 7%
• Founded year: 1984
• Headcount: 51-200
• LinkedIn: rizzo-international

Rizzo International, Inc. is an engineering consulting firm based in Pittsburgh, Pennsylvania, specializing in civil, geotechnical, structural, and hydrologic engineering. Established in 1984, the company has evolved from a small office to a significant player in the engineering sector, employing around 147 professionals. Rizzo International provides innovative solutions to complex engineering challenges, particularly for clients in the infrastructure and power generation sectors. Their services include dam and water resources engineering, geotechnical assessments, seismic hazard analysis, and construction support services. The firm has been involved in numerous high-profile projects, such as the rehabilitation of dams and the assessment of nuclear power facilities, demonstrating their expertise in critical infrastructure. Rizzo International is also certified as a Women’s Business Enterprise, which enhances their appeal in public works projects that prioritize diversity. Their commitment to quality is underscored by their ISO 9001:2015 certification, ensuring that they meet international standards in engineering and consulting services.

15. Barry Isett & Associates

• Website: barryisett.com
• Ownership type: Private
• Headquarters: Allentown, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1977
• Headcount: 201-500
• LinkedIn: barry-isett-%26-associates

Barry Isett & Associates is an engineering consulting firm based in Allentown, Pennsylvania, founded in 1977. The company specializes in a wide array of engineering services, including civil, structural, and mechanical engineering, alongside project management and environmental consulting. They cater to multiple sectors, such as education, healthcare, and commercial industries, helping clients navigate complex engineering challenges and regulatory requirements. With a workforce of 201-500 employees, the firm emphasizes a collaborative approach, integrating various engineering disciplines to provide comprehensive solutions. Their employee ownership model fosters a culture of responsibility and client-focused service, which is reflected in their high rate of repeat business. Barry Isett & Associates has built a reputation for reliability and expertise, making them a notable player in the engineering consulting field.

16. RPA Engineering

• Website: rpaengr.com
• Ownership type: Private
• Headquarters: Wyomissing, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 98%, Indonesia 2%
• Founded year: 1989
• Headcount: 51-200
• LinkedIn: rpa-engineering

RPA Engineering, founded in 1989 and based in Wyomissing, Pennsylvania, is a private consulting engineering firm with a workforce of approximately 125 employees. The company offers a wide range of engineering and design services tailored to various industries, including Pharmaceutical/Biotech, Power, Industrial/Manufacturing, Food/Beverage, and Automation/Process Control. RPA Engineering prides itself on delivering high-quality, innovative solutions that enhance operational efficiency and ensure safety compliance for its clients. Their expertise spans multiple engineering disciplines, including mechanical, electrical, structural, and controls engineering. The firm has built a reputation for its personalized approach to projects, regardless of size, and has successfully collaborated with numerous national and international clients. RPA Engineering's commitment to quality and safety is evident in their specialized services, such as hazardous code analysis and energy management, which address the unique challenges faced by their clients in complex environments.

17. Tpd

• Website: tpdinc.com
• Ownership type: Private
• Headquarters: Pottstown, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1989
• Headcount: 201-500
• LinkedIn: traffic-planning-%26-design-inc-

TPD, based in Pottstown, Pennsylvania, is an engineering firm that specializes in transportation planning and design. Since its inception in 1989, TPD has focused on enhancing infrastructure and transportation systems through a variety of services, including bridge design, traffic signal systems, and environmental consulting. The firm has successfully completed over 3,000 transportation studies, showcasing their expertise in the field. TPD serves a wide range of clients, from government agencies to private sector companies, aiming to improve traffic flow and safety. Their commitment to community service and employee engagement is evident through various initiatives and awards, reflecting their dedication to both their clients and the communities they serve.

18. DEDC, LLC - Consulting and Commissioning Engineers

• Website: dedc-eng.com
• Ownership type: Private
• Headquarters: Philadelphia, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1965
• Headcount: 51-200
• LinkedIn: dedc-llc

DEDC, LLC - Consulting and Commissioning Engineers, based in Philadelphia, Pennsylvania, has been providing engineering and design services since its founding in 1965. The firm specializes in a range of services including engineering evaluations, sustainable design, commissioning services, and energy audits. DEDC serves multiple sectors such as healthcare, education, commercial, and manufacturing, helping clients enhance their facilities and operational efficiency. Their commitment to sustainable practices and energy modeling reflects a proactive approach to modern engineering challenges. With a team of 51-200 employees, DEDC is positioned to address the needs of its clients effectively, ensuring that projects are not only functional but also environmentally responsible.

19. Systems Design Engineering, Inc.

• Website: sdei.net
• Ownership type: Private
• Headquarters: Leesport, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1988
• Headcount: 11-50
• LinkedIn: systems-design-engineering-inc-

Systems Design Engineering, Inc. (SDE) is a private engineering and consulting firm based in Leesport, Pennsylvania. Established in 1988, SDE has built a reputation for providing a wide array of engineering services, including civil, structural, environmental, and mechanical engineering, along with construction management. The firm primarily serves municipalities and businesses, assisting them with project design, regulatory compliance, and effective management to ensure successful project outcomes. SDE's expertise extends to various sectors, including food and beverage, medical facilities, and water and wastewater engineering. The company has worked on significant projects, such as those for the Schuylkill County Municipal Authority and MillerCoors, showcasing its capability to handle complex engineering challenges. With a dedicated team of professionals, SDE is committed to delivering practical and innovative solutions tailored to the unique needs of its clients.

20. Borton-Lawson, a Verdantas Company

• Website: borton-lawson.com
• Ownership type: Corporate
• Headquarters: Wilkes-Barre, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2023
• Founded year: 1988
• Headcount: 51-200
• LinkedIn: borton-lawson

Borton-Lawson, a Verdantas Company, is a professional services firm based in Wilkes-Barre, Pennsylvania, specializing in engineering and environmental science. Established in 1988, the company has built a reputation for providing innovative solutions that address the intricate challenges faced by clients across multiple sectors. Their services include environmental assessments, engineering design, and integrated technology solutions, all aimed at promoting sustainability and enhancing community well-being. Borton-Lawson operates primarily within the United States and has a workforce of approximately 72 employees. The firm is actively involved in projects that span various industries, including government, renewable energy, and industrial sectors, showcasing their ability to adapt and respond to the evolving needs of the market.

21. Stratus Team, LLC

• Website: stratusteam.com
• Ownership type: Private Equity
• Headquarters: Coraopolis, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: July 2024
• Founded year: 2022
• Headcount: 201-500
• LinkedIn: stratusteam

Stratus Team, LLC is an architecture and engineering consulting firm based in Coraopolis, Pennsylvania. Founded in 2022, the company emerged from the collaboration of several established firms, including Prime Engineering and Austin Brockenbrough & Associates. Stratus offers a comprehensive suite of services that spans the entire project lifecycle, from initial planning and feasibility studies to final construction oversight. The firm serves a variety of sectors, including civic, commercial, education, and federal government projects. Stratus is committed to delivering high-quality service and ensuring compliance with industry standards. Their team consists of skilled professionals, including engineers, architects, planners, and surveyors, who work together to create innovative solutions that enhance infrastructure and community development. Stratus aims to foster growth and collaboration among its member firms, focusing on investing in talent and technology to drive future success.

22. Cosmos Technologies, Inc.

• Website: cosmostechnologiesinc.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: cosmos-technologies-inc.

Cosmos Technologies, Inc. is an engineering consulting firm based in Pittsburgh, Pennsylvania, with additional offices in Harrisburg, Cleveland, Akron, and Louisville. Established in 1997, the company specializes in civil engineering, environmental management, and construction management. They serve a range of clients, including industrial, municipal, and commercial sectors, helping them navigate complex projects while ensuring adherence to safety and environmental regulations. Cosmos offers a variety of services, such as civil site design, water and wastewater engineering, environmental safety management, and construction inspection. Their commitment to quality and compliance is evident in their extensive service offerings, which include OSHA safety training and environmental assessments. As a certified minority business enterprise (MBE) and HUBZone company, Cosmos Technologies is positioned to meet the needs of clients looking for reliable and compliant engineering solutions.

23. CJL Engineering

• Website: cjlengineering.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1938
• Headcount: 51-200
• LinkedIn: cjl-engineering

CJL Engineering, founded in 1938 and based in Pittsburgh, Pennsylvania, is a private engineering consulting firm that specializes in mechanical, electrical, plumbing, fire protection, and civil engineering services. With a workforce of approximately 147 professionals, the company prides itself on delivering high-quality, tailored solutions to a variety of clients. Their extensive experience allows them to handle complex projects effectively, ensuring that each project is approached with technical ingenuity and a fresh perspective. CJL Engineering has also adapted to contemporary challenges, such as enhancing indoor air quality to combat airborne pathogens, reflecting their commitment to client health and safety. Their proactive strategies and comprehensive service offerings make them a notable entity in the engineering consulting industry.

24. LLI Engineering

• Website: lliengineering.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1910
• Headcount: 11-50
• LinkedIn: lli-engineering

LLI Engineering, based in Pittsburgh, Pennsylvania, is an engineering and architectural design firm that has been operational since 1910. With a workforce of 11-50 employees, the company specializes in mechanical, electrical, plumbing, and structural engineering, along with project management services. Over the years, LLI Engineering has completed more than 10,000 major projects, amounting to over $3.5 billion in construction spending. Their client base includes corporations and construction firms, reflecting their capability to deliver expert design solutions for complex projects. Notable projects include the Pittsburgh Airport Microgrid, which integrates natural gas and solar energy, and the Nature Inn at Bald Eagle, recognized for its eco-friendly design. LLI Engineering's commitment to quality and innovation is evident in their extensive portfolio and their focus on energy-efficient and sustainable engineering practices.

25. Keystone Engineering Group, Inc.

• Website: kegi.net
• Ownership type: Private
• Headquarters: Frazer, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 51-200
• LinkedIn: keystone-engineering-group-inc

Keystone Engineering Group, Inc., established in 1997, is a professional engineering firm based in Frazer, Pennsylvania. The company specializes in design and consulting services for water, wastewater, electrical, and mechanical systems. They cater to a range of clients, including municipalities, private industries, and public utilities, ensuring that their solutions meet compliance standards and enhance operational efficiency. Keystone operates from multiple offices across Pennsylvania, New Jersey, and Delaware, employing a skilled team of approximately 67 professionals. Their expertise spans various sectors, including commercial, educational, transportation, and public utilities. Keystone is also involved in systems integration and construction management, providing comprehensive support from project inception to completion. Their motto, "Forward Thinking for a Sustainable Future," reflects their commitment to innovative engineering solutions that address contemporary challenges in the industry.

Engineering Consulting Companies Insights: Key Companies in Pennsylvania

Company	Headquarter	Size	Founded	Ownership
Civil & Environmental Consultants, Inc.	Moon Township, Pennsylvania, United States (USA)	1001-5000	1989	Corporate
Michael Baker International	Pittsburgh, Pennsylvania, United States (USA)	1001-5000	1940	Private
Gannett Fleming	Mechanicsburg, Pennsylvania, United States (USA)	1001-5000	2004	Private Equity
Pennoni	Philadelphia, Pennsylvania, United States (USA)	1001-5000	1966	Corporate
McCormick Taylor, Inc.	Philadelphia, Pennsylvania, United States (USA)	201-500	1946	Private
McMahon, a Bowman company	Fort Washington, Pennsylvania, United States (USA)	201-500	1976	Corporate
IPS-Integrated Project Services	Blue Bell, Pennsylvania, United States (USA)	1001-5000	1989	Corporate
Urban Engineers	Philadelphia, Pennsylvania, United States (USA)	201-500	1960	Corporate
Burns Engineering, Inc.	Philadelphia, Pennsylvania, United States (USA)	201-500	1960	Private
GAI Consultants, Inc.	Homestead, Pennsylvania, United States (USA)	501-1000	1958	Private Equity
Rettew	Lancaster, Pennsylvania, United States (USA)	201-500	1969	Private
Bala Consulting Engineers	Wayne, Pennsylvania, United States (USA)	51-200	1982	Private
Buchart Horn, Inc.	York, Pennsylvania, United States (USA)	201-500	1945	Private
Rizzo International	Pittsburgh, Pennsylvania, United States (USA)	51-200	1984	Private
Barry Isett & Associates	Allentown, Pennsylvania, United States (USA)	201-500	1977	Private
RPA Engineering	Wyomissing, Pennsylvania, United States (USA)	51-200	1989	Private
Tpd	Pottstown, Pennsylvania, United States (USA)	201-500	1989	Private
DEDC, LLC - Consulting and Commissioning Engineers	Philadelphia, Pennsylvania, United States (USA)	51-200	1965	Private
Systems Design Engineering, Inc.	Leesport, Pennsylvania, United States (USA)	11-50	1988	Private
Borton-Lawson, a Verdantas Company	Wilkes-Barre, Pennsylvania, United States (USA)	51-200	1988	Corporate
Stratus Team, LLC	Coraopolis, Pennsylvania, United States (USA)	201-500	2022	Private Equity
Cosmos Technologies, Inc.	Pittsburgh, Pennsylvania, United States (USA)	11-50	1997	Private
CJL Engineering	Pittsburgh, Pennsylvania, United States (USA)	51-200	1938	Private
LLI Engineering	Pittsburgh, Pennsylvania, United States (USA)	11-50	1910	Private
Keystone Engineering Group, Inc.	Frazer, Pennsylvania, United States (USA)	51-200	1997	Private

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