Environmental engineering companies in Pennsylvania focus on solving pressing environmental challenges through innovative solutions. These firms are involved in a range of services including waste management, compliance consulting, ecological assessments, and infrastructure design. The industry is evolving as environmental regulations become stricter, and there’s a growing emphasis on sustainability and renewable energy solutions. Notably, the field is seeing an increase in the integration of emerging technologies, aligning environmental goals with community needs. This dynamic is positioned to propel further advancements, potentially transforming how businesses and local governments address ecological concerns moving forward.

The companies listed here vary in size from small firms to large enterprises, predominantly based in urban areas like Philadelphia and Pittsburgh. Founded between the early 20th century and the late 2010s, they specialize in environmental consulting, compliance, and engineering services. With workforces ranging from around a dozen to several thousand, these companies exhibit a robust presence in the sector, showcasing capabilities in air quality management, water treatment, and ecological conservation. Their varying years of establishment reflect both tradition and contemporary practices in environmental science.

Continue reading to discover more about Pennsylvania's top environmental engineering companies.

Top 25 Environmental Engineering 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 based in Moon Township, Pennsylvania. Established in 1989, the company has grown to employ over 2,000 professionals across 34 offices nationwide. CEC specializes in a variety of services, including air quality assessments, civil engineering, ecological sciences, and waste management. They cater to a broad spectrum of industries, including manufacturing, mining, oil and gas, and public sector projects. CEC is recognized for its commitment to quality service, ensuring that projects align with client goals while adhering to schedules and budgets. The firm has been consistently ranked among the top environmental firms in the country, reflecting its expertise and influence in the industry. CEC's employee ownership model promotes a culture of accountability and collaboration, enhancing their ability to deliver effective solutions to complex environmental challenges.

2. 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, tackling challenges in land development and environmental safety. Pennoni's commitment to high-quality consulting services is evident in their extensive portfolio, which includes projects focused on sustainable solutions and community improvement. Their environmental division plays a crucial role in assessing and managing environmental hazards, as seen in their collaboration with Sheltainer Homes to ensure safe housing solutions. This multifaceted approach positions Pennoni as a significant player in the environmental engineering sector.

3. Weston Solutions, Inc.

• Website: westonsolutions.com
• Ownership type: Private
• Headquarters: West Chester, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 97%, Other 3%
• Founded year: 1957
• Headcount: 1001-5000
• LinkedIn: weston-solutions-inc-

Weston Solutions, Inc. is a private company based in West Chester, Pennsylvania, specializing in environmental and infrastructure services. Established in 1957, Weston has built a robust portfolio that includes remediation, environmental compliance, and infrastructure improvements. The firm serves a wide range of clients, including federal, state, and local governments, as well as industrial entities. Their services address complex environmental challenges, such as PFAS remediation, disaster management, and air quality management. With a workforce of over 1,400 employees, Weston emphasizes sustainability and community impact in its operations. The company is recognized for its innovative solutions and has received accolades for its contributions to environmental engineering, including awards for its geospatial solutions. Weston Solutions is committed to creating a better tomorrow through its engineering and construction services, reflecting a deep understanding of the environmental issues facing various sectors today.

4. 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, founded in 1960 and based in Philadelphia, Pennsylvania, is an engineering firm that provides a wide array of services including design, environmental assessments, construction management, and program management. With a workforce of approximately 449 employees, the company serves both government and private sector clients, addressing infrastructure challenges while ensuring compliance with environmental regulations. Urban Engineers has a strong emphasis on sustainability, offering services such as brownfield redevelopment, facility assessments, and environmental permitting. Their projects often focus on enhancing community resilience against climate change, particularly through flood protection and stormwater management initiatives. The firm has also developed a training institute to promote professional development in the engineering field, further showcasing their commitment to the industry. Urban Engineers operates primarily within the United States, maintaining a significant presence in various markets including transportation, energy, and public spaces.

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., founded in 1946 and based in Philadelphia, Pennsylvania, is a consulting firm specializing in engineering and planning services. With a workforce of approximately 425 employees, the company has built a reputation for its comprehensive approach to infrastructure development and environmental compliance. Their service offerings include construction, design, environmental studies, and program management. McCormick Taylor collaborates with various clients, including government agencies and utility companies, to address complex challenges in infrastructure and environmental management. The firm is particularly noted for its environmental capabilities, which include agency coordination, environmental permitting, and stream restoration projects. Their work reflects a commitment to creating solutions that harmonize with community needs and environmental regulations.

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 variety of engineering services, including civil, mechanical, electrical, plumbing, and environmental engineering. They cater to both government and private sector clients, focusing on infrastructure development and management. McMahon's environmental engineering services include water and wastewater management, sustainable building design, and energy efficiency projects. Their recent funding of $18.5 million in May 2022 underscores their active role in the industry and their capacity to undertake significant projects. With a workforce of 201-500 employees, McMahon is well-equipped to handle complex engineering challenges while maintaining a commitment to environmental sustainability.

7. 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 includes a variety of projects across sectors such as aviation, healthcare, and renewable energy. The company prides itself on providing sustainable and efficient solutions to both government and private sector clients. Their services range from environmental engineering and studies to land development and stream restoration. GAI's team includes experts in various fields, ensuring comprehensive support for complex projects. The firm is dedicated to corporate responsibility and actively engages in initiatives that promote environmental stewardship and community enhancement. With a workforce of nearly 1,000 employees, GAI continues to play a significant role in addressing the pressing infrastructure and environmental challenges of today.

8. 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, founded in 1988. The company specializes in engineering and environmental science, offering innovative solutions that help clients navigate complex challenges while promoting sustainability. Their services include environmental assessments, engineering design, and integrated technology solutions, which are critical in addressing today's pressing environmental issues. Borton-Lawson operates across various sectors, including government, renewable energy, and industrial markets, demonstrating their versatility and commitment to environmental stewardship. Their projects often focus on enhancing community safety and health, showcasing their dedication to creating safer environments. With a team of skilled professionals, Borton-Lawson is well-equipped to tackle intricate engineering challenges and contribute to sustainable development initiatives.

9. Quad Three Group, Inc.

• Website: quad3.com
• Ownership type: Private
• Headquarters: Wilkes-Barre, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1988
• Headcount: 51-200
• LinkedIn: quad3-group-inc-

Quad Three Group, Inc., based in Wilkes-Barre, Pennsylvania, is a professional services firm founded in 1988. With a workforce of around 21 employees, the company specializes in architecture, engineering, and environmental consulting. Their services are tailored to meet the needs of both government and private sector clients, emphasizing sustainable design and regulatory compliance. Quad Three Group has built a reputation for delivering high-quality projects through a collaborative approach that integrates environmental considerations into all aspects of design and engineering. Their environmental services include hazardous waste evaluation, environmental impact studies, and stormwater management, showcasing their commitment to addressing pressing environmental challenges. The firm actively engages with the community, with employees participating in local initiatives, further solidifying their role as a responsible corporate citizen.

10. 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, founded in 1945. The company specializes in engineering, architecture, and planning, serving both government and private sector clients. With a workforce of 201-500 employees, Buchart Horn operates through a collaborative model that emphasizes sustainability and community engagement. Their engineering services cover critical areas such as water resources, where they provide solutions for water and wastewater treatment, as well as environmental sciences and civil/stormwater engineering. The firm has a notable track record of projects that enhance environmental quality and community infrastructure, including initiatives aimed at revitalizing urban spaces and improving transportation systems. Buchart Horn's commitment to corporate responsibility and safety further underscores their dedication to creating sustainable solutions for the communities they serve.

11. LandStudies, Inc.

• Website: landstudies.com
• Ownership type: Private
• Headquarters: Lititz, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1989
• Headcount: 11-50
• LinkedIn: landstudies

LandStudies, Inc., based in Lititz, Pennsylvania, is an environmental consulting and engineering firm founded in 1989. With a team of 44 employees, the company focuses on providing innovative solutions for water management, watershed planning, and landscape architecture. They serve municipalities and organizations, helping them navigate environmental challenges and comply with regulatory requirements. Their expertise includes specialized services like MS4 permit support, floodplain restoration, and ecological construction. LandStudies has pioneered watershed planning initiatives in Pennsylvania, notably with the Lititz Run program, which emphasizes community engagement and long-term environmental stewardship. The firm also offers educational resources and publications, contributing to the broader understanding of economic ecology and sustainable practices. Their commitment to restoring and managing natural resources reflects a holistic approach to environmental engineering.

12. Liberty Environmental

• Website: libertyenviro.com
• Ownership type: Private
• Headquarters: Reading, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2004
• Headcount: 11-50
• LinkedIn: liberty-environmental-inc.

Liberty Environmental is an environmental consulting and engineering firm based in Reading, Pennsylvania. Established in 2004, the company has built a reputation for providing a comprehensive suite of services aimed at assisting businesses and government agencies with their environmental compliance needs. Their offerings include regulatory compliance, air quality management, wastewater treatment design, site assessment and remediation, and energy efficiency consulting. With a team of experienced professionals, Liberty Environmental focuses on delivering tailored solutions that address the unique challenges faced by their clients. They have worked with various industries, including food manufacturing and education, showcasing their ability to adapt to different regulatory environments and client needs. The firm operates multiple offices across Pennsylvania and New York, enhancing their ability to serve a broad client base. Liberty Environmental's commitment to understanding client needs and providing effective environmental management solutions positions them as a relevant player in the environmental engineering sector.

13. Penn E&R

• Website: penn-er.com
• Ownership type: Private
• Headquarters: Doylestown, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 51-200
• LinkedIn: penn-e-%26-r

Penn Environmental & Remediation, Inc. (Penn E&R) is a consulting firm based in Doylestown, Pennsylvania, founded in 1996. The company specializes in environmental, engineering, and construction services, offering a comprehensive range of solutions tailored to various sectors, including construction, utilities, and government. Their services include environmental assessments, remediation, civil engineering, and environmental permitting, among others. Penn E&R has a strong focus on delivering reliable and cost-effective solutions, which is evident in their extensive project portfolio that spans multiple industries. They are particularly active in areas such as renewable energy and waste management, reflecting their commitment to addressing contemporary environmental challenges. The firm operates with a team of experienced professionals, ensuring that projects are executed efficiently and in compliance with regulatory standards.

14. 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 both government agencies and private sector clients. Their work addresses complex infrastructure challenges across various sectors, including transportation, water resources, and energy. Gannett Fleming emphasizes sustainability and resiliency in their projects, which range from water and wastewater treatment facilities to renewable energy initiatives. Their expertise extends to advisory services, engineering, and technology implementation, making them a significant contributor to the environmental engineering field. The firm has not reported any recent funding, indicating stability and a focus on organic growth.

15. 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 operational since 1940. With a workforce of over 4,200 employees, the company provides a wide array of services including design, planning, construction management, and environmental consulting. They serve a variety of clients, primarily in government sectors, tackling complex infrastructure challenges that enhance community accessibility and sustainability. Their practices include environmental services, water management, and resilience and sustainability solutions, which are crucial in addressing today's environmental challenges. Michael Baker's commitment to making a difference is reflected in their partnerships and projects that aim to improve infrastructure and promote environmental health. They have a strong focus on community engagement and sustainability, which is evident in their initiatives and the projects they undertake.

16. Key Environmental Inc.

• Website: keyenvir.com
• Ownership type: Private
• Headquarters: Carnegie, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1995
• Headcount: 51-200
• LinkedIn: key-environmental-inc.

Key Environmental Inc., based in Carnegie, Pennsylvania, is an environmental consulting firm that specializes in providing solutions for environmental compliance, remediation, and engineering projects. Established in 1995, the company has built a reputation for helping businesses and organizations navigate complex environmental regulations and effectively manage contaminated sites. Their service offerings include environmental consulting, engineering design, and construction management. With a workforce of approximately 49 employees, Key Environmental has successfully completed over 350 projects across various sectors, demonstrating their capability in addressing both new construction developments and environmentally impacted sites. The firm has also developed innovative solutions for Coal Combustion Residuals (CCR) remediation, contributing to sustainable practices in the industry. Their focus on emerging contaminants, such as PFAS, highlights their commitment to addressing current environmental challenges and adapting to regulatory changes.

17. Bluestone Environmental Group, Inc.

• Website: bluestoneenviro.com
• Ownership type: Private
• Headquarters: Malvern, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2010
• Headcount: 51-200
• LinkedIn: bluestone-environmental-group-inc.

Bluestone Environmental Group, Inc. is an environmental consulting and engineering firm based in Malvern, Pennsylvania. Established in 2010, the company specializes in compliance, risk assessments, and remediation services. It operates primarily in the Northeast and serves a range of clients, including government agencies and private organizations. Bluestone is recognized for its tailored solutions that address complex environmental challenges while ensuring regulatory compliance. The firm is an 8(a) certified small business and holds the Economically Disadvantaged Women-Owned Small Business (EDWOSB) certification. With a team of over 60 professionals, Bluestone has successfully managed more than 350 environmental projects, showcasing its expertise in areas such as environmental compliance, permitting, and ecological risk assessments. The company has also formed strategic partnerships with subcontractors to enhance its project execution capabilities. Noteworthy projects include environmental management services for NASA and long-term monitoring for the U.S. Army Corps of Engineers. Bluestone's commitment to ethical practices and innovative solutions further solidifies its position in the environmental engineering sector.

18. 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. Founded in 1997, the company has built a reputation for providing a range of engineering services, particularly in civil engineering, environmental management, and construction management. They serve industrial, municipal, and commercial clients, assisting them in navigating complex projects while ensuring adherence to safety and environmental regulations. Their core capabilities include water and wastewater engineering, environmental and safety management, and energy management. Cosmos Technologies is also recognized as a certified minority business enterprise (MBE) and HUBZone company, which underscores their commitment to diversity and community engagement. The firm has not reported any funding, indicating a stable operational model focused on delivering engineering solutions without external financial backing.

19. Spotts, Stevens and McCoy

• Website: ssmgroup.com
• Ownership type: Family Owned
• Headquarters: Reading, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1932
• Headcount: 51-200
• LinkedIn: spotts-stevens-and-mccoy-inc.

Spotts, Stevens and McCoy (SSM) is an engineering and environmental consulting firm based in Reading, Pennsylvania. Founded in 1932, SSM has built a reputation for providing comprehensive services that include surveying, infrastructure planning, and environmental management. The firm serves a variety of clients, including businesses and government entities, assisting them in overcoming challenges related to project development and regulatory compliance. SSM emphasizes sustainability and innovative engineering solutions, focusing on areas such as water resources, wastewater management, and energy efficiency. Their work is integral to ensuring that projects not only meet current standards but also contribute positively to the environment. SSM's expertise extends to managing environmental hazards, conducting environmental audits, and providing health and safety training, making them a valuable partner in the environmental engineering field.

20. Collective Efforts, LLC

• Website: collectiveefforts.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2000
• Headcount: 11-50
• LinkedIn: collective-efforts-llc

Collective Efforts, LLC is a women-owned consulting firm based in Pittsburgh, Pennsylvania, founded in 2000. With a team of civil engineers and environmental scientists, the company provides a wide array of services in civil and environmental engineering. Their offerings include sustainable design, environmental assessments, and construction management, catering primarily to municipalities and private developers in Western Pennsylvania and Ohio. The firm is recognized for its hands-on approach, ensuring that clients interact directly with the professionals managing their projects. Collective Efforts has been involved in various notable projects, such as the Herron Avenue Green Infrastructure Project, which won an award for its innovative stormwater management solutions. They are also a certified women-owned business and hold several certifications that enhance their credibility in the industry. Their commitment to community involvement and environmental compliance further underscores their role in the environmental engineering sector.

21. CME Engineering

• Website: cmemgmt.com
• Ownership type: Private
• Headquarters: Greensburg, Pennsylvania, United States (USA)
• Founded year: 1999
• Headcount: 51-200
• LinkedIn: cme-management-llc

CME Engineering, part of Apex Companies, LLC, is a consulting firm based in Greensburg, Pennsylvania, founded in 1999. The company specializes in environmental engineering and compliance services, offering a wide array of solutions that include water management, environmental assessments, and health and safety consulting. CME Engineering caters to both public agencies and private businesses across various sectors, helping them navigate regulatory challenges and implement sustainable practices. Their expertise extends to stormwater management, wastewater management, and emergency response, showcasing their active involvement in critical environmental issues. The firm is dedicated to shaping a safe and sustainable future, reflecting a strong commitment to corporate social responsibility and community engagement.

22. Gilmore & Associates, Inc.

• Website: gilmore-assoc.com
• Ownership type: Private
• Headquarters: New Britain, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 99%
• Founded year: 1918
• Headcount: 51-200
• LinkedIn: gilmore-%26-associates

Gilmore & Associates, Inc. is a consulting firm based in New Britain, Pennsylvania, established in 1918. The company operates in civil engineering, surveying, landscape architecture, and environmental services. With a workforce of 51 to 200 employees, they cater to municipalities, government agencies, and private sector clients. Their environmental services are particularly noteworthy, as they include groundwater investigations, permitting for industrial properties, and environmental compliance assessments. The firm emphasizes sustainable development and has a strong portfolio of projects that reflect their commitment to environmental stewardship. Their expertise supports various infrastructure projects and community planning initiatives, making them a significant contributor to the field of environmental engineering.

23. 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, founded in 1969. With a workforce of approximately 324 employees, Rettew provides a wide array of solutions across various sectors, including environmental, infrastructure, and project management. The company emphasizes a collaborative approach to meet client needs effectively. Rettew's environmental services are particularly noteworthy, as they include environmental compliance, site assessments, and remediation efforts. Their team comprises experts from various fields, such as geologists and environmental scientists, who work together to ensure projects are completed on time and within budget. Rettew has built a reputation for its ability to manage complex projects while maintaining a strong focus on environmental stewardship. Their work in renewable energy, including the construction of North America's largest floating solar installation, showcases their innovative approach to sustainable engineering practices.

24. Sci-Tek Consultants, Inc.

• Website: scitekanswers.com
• Ownership type: Private
• Headquarters: Pittsburgh, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 11-50
• LinkedIn: sci-tek-consultants-inc.

Sci-Tek Consultants, Inc., founded in 1996 and based in Pittsburgh, Pennsylvania, is a private engineering consulting firm specializing in civil, geotechnical, environmental engineering, and surveying. With a workforce of approximately 36 employees, the company has successfully completed over 1,100 projects across various sectors, including water and sewer, aviation, transportation, and higher education. Sci-Tek is recognized as a certified minority business enterprise, emphasizing its commitment to diversity and inclusion within the engineering field. The firm operates primarily in the Eastern United States, serving both government agencies and private corporations. Their environmental consulting services include Phase I and II Environmental Site Assessments, hazardous materials inspections, and environmental remediation, reflecting their active engagement in addressing environmental issues. The company has celebrated its 25th anniversary in 2021, marking a significant milestone in its operational history.

25. TerranearPMC

• Website: terranearpmc.com
• Ownership type: Private
• Headquarters: Exton, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: terranearpmc

TerranearPMC, founded in 2004 and based in Exton, Pennsylvania, is a private environmental consulting and engineering firm. The company specializes in a range of services including remediation, waste management, and renewable energy solutions. With a workforce of approximately 66 employees, TerranearPMC has established itself as a reliable partner for federal, state, and municipal agencies, as well as select commercial markets. Their expertise extends to areas such as groundwater treatment, environmental compliance, and decontamination services. The firm emphasizes safety and sustainability in its operations, boasting a Zero Accident culture and a strong track record of successful project execution. Over the years, TerranearPMC has developed a reputation for delivering innovative solutions that meet the evolving needs of its clients, contributing to environmental protection and resource management.

Environmental Engineering Insights: Key Companies in Pennsylvania

Company	Headquarter	Size	Founded	Ownership
Civil & Environmental Consultants, Inc.	Moon Township, Pennsylvania, United States (USA)	1001-5000	1989	Corporate
Pennoni	Philadelphia, Pennsylvania, United States (USA)	1001-5000	1966	Corporate
Weston Solutions, Inc.	West Chester, Pennsylvania, United States (USA)	1001-5000	1957	Private
Urban Engineers	Philadelphia, Pennsylvania, United States (USA)	201-500	1960	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
GAI Consultants, Inc.	Homestead, Pennsylvania, United States (USA)	501-1000	1958	Private Equity
Borton-Lawson, a Verdantas Company	Wilkes-Barre, Pennsylvania, United States (USA)	51-200	1988	Corporate
Quad Three Group, Inc.	Wilkes-Barre, Pennsylvania, United States (USA)	51-200	1988	Private
Buchart Horn, Inc.	York, Pennsylvania, United States (USA)	201-500	1945	Private
LandStudies, Inc.	Lititz, Pennsylvania, United States (USA)	11-50	1989	Private
Liberty Environmental	Reading, Pennsylvania, United States (USA)	11-50	2004	Private
Penn E&R	Doylestown, Pennsylvania, United States (USA)	51-200	1996	Private
Gannett Fleming	Mechanicsburg, Pennsylvania, United States (USA)	1001-5000	2004	Private Equity
Michael Baker International	Pittsburgh, Pennsylvania, United States (USA)	1001-5000	1940	Private
Key Environmental Inc.	Carnegie, Pennsylvania, United States (USA)	51-200	1995	Private
Bluestone Environmental Group, Inc.	Malvern, Pennsylvania, United States (USA)	51-200	2010	Private
Cosmos Technologies, Inc.	Pittsburgh, Pennsylvania, United States (USA)	11-50	1997	Private
Spotts, Stevens and McCoy	Reading, Pennsylvania, United States (USA)	51-200	1932	Family Owned
Collective Efforts, LLC	Pittsburgh, Pennsylvania, United States (USA)	11-50	2000	Private
CME Engineering	Greensburg, Pennsylvania, United States (USA)	51-200	1999	Private
Gilmore & Associates, Inc.	New Britain, Pennsylvania, United States (USA)	51-200	1918	Private
Rettew	Lancaster, Pennsylvania, United States (USA)	201-500	1969	Private
Sci-Tek Consultants, Inc.	Pittsburgh, Pennsylvania, United States (USA)	11-50	1996	Private
TerranearPMC	Exton, Pennsylvania, United States (USA)	51-200	2004	Private

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