Environmental engineering companies in Illinois focus on sustainable practices, water management, and urban planning. They tackle issues ranging from pollution remediation to infrastructure improvements. This sector is evolving, as regulatory demands grow and communities prioritize eco-friendly solutions. Notably, the integration of green technology is reshaping project designs, ensuring both environmental stewardship and efficiency. The appetite for innovative water conservation methods is also rising, highlighting a shift toward resource conservation. As environmental challenges heighten, firms in this state play a crucial role in providing actionable solutions, becoming more indispensable with each passing year.

The companies featured in this list represent a mix of large and medium-sized enterprises. They are headquartered throughout Illinois, with founding years stretching from 1944 to 2006. Their specializations range from civil engineering and environmental consulting to construction management and infrastructure development, making them vital players in shaping sustainable futures. Many have a strong community focus and boast impressive project portfolios, demonstrating their capabilities and commitments to improving environmental standards and outcomes. Their varied expertise signals a collective adaptation prepped for the industry’s future needs.

Discover the top environmental engineering companies making an impact in Illinois.

Top 21 Environmental Engineering Companies in Illinois

1. Imeg

• Website: imegcorp.com
• Ownership type: Private
• Headquarters: Rock Island, Illinois, United States (USA)
• Employee distribution: United States (USA) 84%, India 16%
• Founded year: 1955
• Headcount: 1001-5000
• LinkedIn: imeg-corp

IMEG is an engineering consulting firm based in Rock Island, Illinois, founded in 1955. With a workforce of nearly 3,000 professionals across the United States, IMEG provides a wide array of engineering services, including civil, structural, mechanical, and electrical engineering. The firm is particularly noted for its expertise in sustainability and performance optimization, which are essential in the current environmental landscape. IMEG's projects often focus on high-performance building design and infrastructure solutions, catering to various sectors such as healthcare, education, and transportation. Their sustainability initiatives include energy modeling, LEED certification services, and net zero consulting, showcasing their commitment to environmentally responsible engineering practices. IMEG has also been recognized in industry rankings, reflecting its significant role in the engineering sector.

2. V3 Companies

• Website: v3co.com
• Ownership type: Private
• Headquarters: Woodridge, Illinois, United States (USA)
• Employee distribution: United States (USA) 89%, Canada 9%, Other 2%
• Founded year: 1983
• Headcount: 201-500
• LinkedIn: v3-companies

V3 Companies, founded in 1983 and based in Woodridge, Illinois, is a private engineering and consulting firm with a workforce of approximately 461 employees. The company specializes in construction management, environmental services, and municipal consulting, catering to a wide range of clients, including developers and government agencies. V3 is dedicated to providing innovative solutions for land development and infrastructure projects, with a strong emphasis on ecological restoration and environmental sustainability. Their portfolio includes notable projects that aim to revitalize urban spaces and enhance community well-being, such as transforming brownfields into parks and addressing air quality challenges. V3's commitment to excellence and community improvement is evident in their approach to projects and their focus on creating positive environmental outcomes.

3. Baxter & Woodman

• Website: baxterwoodman.com
• Ownership type: Private
• Headquarters: Crystal Lake, Illinois, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Founded year: 1946
• Headcount: 201-500
• LinkedIn: baxter-%26-woodman

Baxter & Woodman is an engineering and consulting firm based in Crystal Lake, Illinois, established in 1946. With a workforce of approximately 357 employees, the company focuses on infrastructure planning, design, and construction. Their service offerings include community and urban planning, water resources management, and wastewater treatment, catering primarily to municipalities and private sector organizations. The firm emphasizes sustainable engineering solutions, aiming to improve community value and quality of life through their projects. Baxter & Woodman has a notable presence across several states, including Illinois, Florida, Texas, and Wisconsin, and they are involved in various initiatives that support environmental stewardship and community engagement. Their commitment to innovative technologies and practices positions them as a relevant player in the environmental engineering sector.

4. Weaver Consultants Group

• Website: wcgrp.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1991
• Headcount: 201-500
• LinkedIn: weaver-consultants-group

Weaver Consultants Group, founded in 1991 and based in Chicago, Illinois, is a private consulting firm that specializes in engineering services. With a workforce of approximately 357 employees, the company provides a broad array of solutions in solid waste management, environmental services, and civil survey geotechnical services. Their expertise includes navigating complex regulatory environments, ensuring compliance, and addressing environmental challenges for a variety of clients, including businesses, municipalities, and industrial manufacturers. The firm is known for its commitment to quality and safety, and it has built a reputation for delivering innovative project management and development solutions. Their services cover critical areas such as air quality, water management, land assessments, and remediation, making them a significant contributor to the environmental engineering sector.

5. Christopher B. Burke Engineering, Ltd.

• Website: cbbel.com
• Ownership type: Private
• Headquarters: Rosemont, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1986
• Headcount: 201-500
• LinkedIn: christopher-b--burke-engineering-ltd-

Christopher B. Burke Engineering, Ltd. (CBBEL) is a consulting engineering and surveying firm based in Rosemont, Illinois, founded in 1986. With a workforce of approximately 223 employees, CBBEL provides a wide array of services, including civil design, construction management, and environmental consulting. The firm primarily serves public sector clients, such as municipalities and counties, addressing various engineering and environmental challenges. CBBEL has a notable track record, having completed over 8,500 environmental resource projects, which include extensive work in stormwater management and wetland mitigation. Their expertise extends to renewable energy projects, where they assist in environmental planning and permitting. CBBEL's commitment to sustainability is evident in their project designs and community involvement initiatives, making them a relevant player in the environmental engineering sector.

6. Jacob & Hefner Associates, Inc.

• Website: jacobandhefner.com
• Ownership type: Private
• Headquarters: Downers Grove, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 51-200
• LinkedIn: jacob-and-hefner-associates

Jacob & Hefner Associates, Inc. (JHA) is a civil engineering and environmental consulting firm based in Downers Grove, Illinois, with additional offices across California, Georgia, Texas, and Washington. Founded in 1996, JHA specializes in civil engineering, surveying, and environmental remediation. The firm caters to a wide range of clients, including real estate developers, architects, and government agencies, assisting them in navigating complex projects and regulatory landscapes. JHA's environmental services include site assessments, remediation implementation, and ongoing monitoring, showcasing their capability to handle projects of varying scales, from small commercial properties to large aerospace facilities. Their team comprises experienced professionals, including licensed engineers and geologists, who are dedicated to delivering quality and sustainable solutions. JHA's mission emphasizes building for the long term, ensuring that their projects are not only effective but also environmentally responsible.

7. Hanson Professional Services Inc.

• Website: hanson-inc.com
• Ownership type: Corporate
• Headquarters: Springfield, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: May 2022
• Founded year: 1954
• Headcount: 501-1000
• LinkedIn: hanson-professional-services-inc.

Hanson Professional Services Inc., founded in 1954 and based in Springfield, Illinois, is a consulting firm specializing in engineering, planning, and project management services. With a workforce of over 500 employees, the company serves clients across multiple sectors, including aviation, healthcare, and local government. Notably, Hanson has a dedicated environmental services division that handles impact assessments, permitting, and waste management, showcasing their expertise in environmental engineering. The firm is also committed to sustainability, being a corporate member of the U.S. Green Building Council and a charter member of the Institute for Sustainable Infrastructure. This commitment reflects their proactive approach to integrating sustainable practices into their projects, ensuring compliance with environmental regulations while promoting resilience and efficiency in their designs.

8. Lochner

• Website: hwlochner.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1944
• Headcount: 1001-5000
• LinkedIn: lochner

Lochner, founded in 1944 and based in Chicago, Illinois, is a private infrastructure services company with a workforce of over 800 employees. The firm specializes in engineering and design, construction management, and environmental consulting, serving both government agencies and private sector clients. Lochner's expertise spans various markets, including aviation, bridges and structures, highways and roads, transit and rail, and notably, water and wastewater. Their environmental services focus on ensuring compliance with regulations and promoting sustainability in infrastructure projects. The company has a national reach, with offices across 22 states, and is recognized for its commitment to enhancing the built and natural environment. Lochner also engages in community service initiatives, reflecting its dedication to social responsibility.

9. BBJ Group

• Website: bbjgroup.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 94%, Pakistan 3%, Nigeria 3%
• Founded year: 1997
• Headcount: 51-200
• LinkedIn: bradburne-briller-%26-johnson-llc

BBJ Group, founded in 1997 and based in Chicago, Illinois, is an environmental consulting firm that provides a comprehensive range of services. The company specializes in environmental engineering, ESG consulting, and remediation, catering to various sectors including construction, energy, and government. With a workforce of approximately 96 employees, BBJ Group has established itself as a reliable partner for clients looking to manage environmental risks and ensure compliance with regulations. Their services include site investigations, waste management, and ecosystem services, among others. The firm has successfully completed numerous projects across the United States and internationally, demonstrating its capability to handle complex environmental challenges. BBJ Group's focus on sustainability and innovative solutions positions it well within the environmental engineering sector.

10. WBK Engineering

• Website: wbkengineering.com
• Ownership type: Private
• Headquarters: St. Charles, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1998
• Headcount: 11-50
• LinkedIn: wbkengineering

WBK Engineering, founded in 1998 and based in St. Charles, Illinois, is a private engineering firm that specializes in civil, environmental, and transportation engineering. With a team of experienced professionals, the company offers a wide range of services including architecture, project management, and environmental consulting. WBK Engineering is particularly noted for its commitment to sustainable solutions that address complex engineering challenges. The firm serves a variety of clients, including federal agencies, municipalities, and Indigenous communities, focusing on projects that enhance infrastructure and promote community development. Their expertise in environmental resources, water management, and ecosystem protection positions them as a significant player in the environmental engineering sector. WBK Engineering is tribally owned and operates under the Bodwé Professional Services Group, which emphasizes their dedication to serving Indigenous communities and protecting natural resources.

11. Manhard Consulting

• Website: manhard.com
• Ownership type: Private
• Headquarters: Lincolnshire, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1972
• Headcount: 201-500
• LinkedIn: manhard-consulting

Manhard Consulting, Ltd. is a civil engineering consulting firm based in Lincolnshire, Illinois, established in 1972. With a workforce of approximately 390 employees, the company serves both public and private sector clients across the United States. Their service offerings include civil engineering, surveying, municipal services, and water resources management, among others. Notably, they have a strong focus on sustainable solutions, including LEED certification, which highlights their commitment to environmentally responsible practices. Manhard Consulting has been recognized as an ENR Top 500 Design Firm and has received accolades such as the NAIOP Chicago Engineering Firm of the Year. Their extensive experience in managing infrastructure projects ensures compliance with environmental regulations, making them a significant player in the environmental engineering sector.

12. Clark Dietz, Inc.

• Website: clarkdietz.com
• Ownership type: Private
• Headquarters: Champaign, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1953
• Headcount: 51-200
• LinkedIn: clark-dietz-inc-

Clark Dietz, Inc., founded in 1953 and based in Champaign, Illinois, is a private engineering firm that specializes in a broad spectrum of services. The company focuses on civil, environmental, transportation, and mechanical engineering, catering primarily to municipalities and organizations. Their mission is to enhance community well-being through innovative engineering solutions and construction management. Clark Dietz is particularly noted for its work in water management, providing essential services related to drinking water, stormwater, and wastewater treatment. The firm also has a growing emphasis on renewable energy, particularly solar engineering, reflecting its adaptability to industry trends. With a workforce of approximately 185 employees, Clark Dietz operates across several states, including Illinois, Indiana, Kentucky, Michigan, and Wisconsin, demonstrating a robust regional presence. Their commitment to public involvement and community engagement further highlights their role in addressing infrastructure needs and operational challenges faced by local governments.

13. Environmental Design International inc.

• Website: envdesigni.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1991
• Headcount: 51-200
• LinkedIn: environmental-design-international-inc.

Environmental Design International inc. (EDI) is a professional engineering firm based in Chicago, Illinois, founded in 1991. With a workforce of approximately 69 employees, EDI provides a range of services that include civil engineering, environmental consulting, construction inspection, and industrial hygiene. The firm serves both public and private sector clients, focusing on infrastructure projects that require environmental compliance and innovative solutions. EDI has been involved in significant projects such as the O'Hare Modernization Program and various hazardous waste surveys for the Illinois Department of Transportation. Their commitment to quality and ethical practices is evident in their project management approach, which spans from planning and design to construction management and reporting. EDI is also recognized for its certifications as a Minority Business Enterprise (MBE), Women-Owned Business Enterprise (WBE), Disadvantaged Business Enterprise (DBE), and Woman-Owned Small Business (WOSB).

14. TERRA Engineering, Ltd.

• Website: terraengineering.com
• Ownership type: Corporate
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: June 2021
• Founded year: 1992
• Headcount: 51-200
• LinkedIn: terra-engineering

TERRA Engineering, Ltd. is a woman-owned engineering firm based in Chicago, Illinois, founded in 1992. With a workforce of approximately 123 employees, TERRA provides a broad spectrum of engineering services, including construction engineering, electrical engineering, municipal engineering, and landscape architecture. The firm serves both municipalities and private developers, focusing on innovative solutions for infrastructure projects. TERRA is particularly noted for its commitment to sustainability and regulatory compliance, which is evident in its various projects, such as the Kenilworth Green Infrastructure Program. The company has expanded its reach with offices in Peoria, St. Louis, and Milwaukee, reflecting its growth and dedication to serving diverse communities. TERRA's culture emphasizes continuous learning and community involvement, with employees actively participating in local charitable initiatives. Their portfolio showcases a range of projects that highlight their expertise in environmental considerations, making them a relevant player in the engineering industry.

15. 2IM Group, LLC

• Website: 2imgroup.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: 2im-group-llc

2IM Group, LLC, based in Chicago, Illinois, is an engineering firm established in 2005. With a workforce of approximately 57 employees, the company provides a range of engineering and environmental services. Their expertise spans civil/site design, water resources, natural resources, and environmental engineering, among others. 2IM Group serves both public and private sector clients, focusing on project planning, design, and management to ensure successful outcomes. The firm has participated in various projects that address environmental concerns, such as flood control and environmental studies, showcasing their commitment to sustainable practices. Their mission emphasizes understanding client priorities and fostering professional development within their team, reflecting a strong organizational culture.

16. WRD Environmental

• Website: wrdenvironmental.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 75%, India 25%
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: wrd-environmental

WRD Environmental, founded in 1997 and based in Chicago, Illinois, is an environmental consulting firm that specializes in green infrastructure, stormwater management, and sustainable design. With a team of 11-50 employees, the company has carved out a niche in providing innovative engineering solutions to municipalities, schools, and conservation organizations. Their projects often focus on enhancing environmental quality and promoting eco-friendly practices. Notable initiatives include the transformation of urban spaces into sustainable environments, such as the Nature Boardwalk at Lincoln Park Zoo, which serves as both a habitat and an educational resource. WRD Environmental has also engaged in numerous community projects, impacting over 150 Midwestern communities through greening initiatives and environmental education. Their collaborations with various nonprofit organizations and local governments further illustrate their commitment to sustainability and community engagement.

17. GSG Consultants, Inc.

• Website: gsg-consultants.com
• Ownership type: Private
• Headquarters: Schaumburg, Illinois, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Founded year: 1992
• Headcount: 51-200
• LinkedIn: gsg-consultants-inc-

GSG Consultants, Inc., founded in 1992 and based in Schaumburg, Illinois, is a private engineering consulting firm that specializes in geotechnical, environmental, and construction management services. With a workforce of approximately 149 employees, the company has built a solid reputation for its commitment to integrity, quality, and reliability. GSG Consultants has played a significant role in shaping infrastructure projects across the Midwest, providing essential services that help clients navigate complex regulatory environments. Their environmental engineering services include preliminary site assessments, groundwater remediation, and compliance monitoring, which are vital for managing environmental risks. The firm has successfully completed thousands of projects, demonstrating their capability and expertise in the field. GSG is also recognized for its community involvement, contributing to various charitable programs that support local initiatives. This blend of technical proficiency and community engagement highlights their commitment to both environmental stewardship and social responsibility.

18. Crawford, Murphy & Tilly

• Website: cmtengr.com
• Ownership type: Private
• Headquarters: Springfield, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1946
• Headcount: 201-500
• LinkedIn: cmtengineering

Crawford, Murphy & Tilly, Inc. is an engineering consulting firm based in Springfield, Illinois, founded in 1946. With a workforce of approximately 456 employees, CMT specializes in infrastructure development, providing a wide array of services that include air service development, environmental consulting, and strategic funding solutions tailored for airports and municipalities. Their expertise allows clients to navigate complex infrastructure challenges effectively. CMT's commitment to sustainability is evident in their operational practices, such as the installation of a solar power system at their headquarters, which significantly reduces carbon emissions. The firm actively engages in community involvement and promotes environmental stewardship, reflecting their dedication to enhancing community services while addressing environmental concerns. CMT's projects often intersect with environmental engineering, particularly in water resources and environmental sciences, showcasing their role in the industry.

19. Andrews Engineering, Inc.

• Website: andrews-eng.com
• Ownership type: Private
• Headquarters: Springfield, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1974
• Headcount: 51-200
• LinkedIn: andrews-engineering-inc-

Andrews Engineering, Inc. is a private engineering firm based in Springfield, Illinois, with additional locations in Chicago, Indianapolis, Pontiac, and St. Louis. Founded in 1974, the company has built a solid reputation in the engineering sector, particularly in environmental consulting and geotechnical engineering. They provide a comprehensive suite of services, including construction, environmental assessments, and remediation efforts. Their environmental services cover a wide array of needs, such as Phase I and II Environmental Site Assessments, compliance audits, and wetland delineation. The firm prides itself on its commitment to integrity and quality, which has driven its growth over the decades. With a workforce of 51-200 employees, Andrews Engineering is well-equipped to tackle various engineering challenges, ensuring compliance with environmental regulations while supporting sustainable practices.

20. Fehr Graham Engineering & Environmental

• Website: fehrgraham.com
• Ownership type: Family Owned
• Headquarters: Freeport, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1973
• Headcount: 51-200
• LinkedIn: fehrgraham

Fehr Graham Engineering & Environmental, based in Freeport, Illinois, is a family-owned engineering firm that specializes in environmental consulting services. Founded in 1973, the company has built a reputation for providing a wide range of solutions, including wastewater and water engineering, municipal engineering, and funding solutions aimed at assisting local governments in enhancing their infrastructure. Their clientele primarily consists of municipalities, reflecting their focus on community-oriented projects. Fehr Graham's team includes licensed process engineers and wastewater operators who work closely with communities to address unique challenges in wastewater management and water system upgrades. Their services are designed to ensure compliance with environmental regulations while promoting sustainable practices. The firm has been involved in various projects that aim to improve the quality of life in the communities they serve, demonstrating their commitment to environmental health and safety.

21. Quigg Engineering Inc.

• Website: quiggengineering.com
• Ownership type: Private
• Headquarters: Springfield, Illinois, United States (USA)
• Founded year: 2006
• Headcount: 51-200
• LinkedIn: quigg-engineering-inc-

Quigg Engineering Inc. is an engineering consulting firm based in Springfield, Illinois, established in 2006. The company operates as a Woman-Owned Disadvantaged Business Enterprise (DBE) and employs around 78 professionals across multiple locations in the Midwest and Florida. Quigg Engineering specializes in infrastructure services, offering a range of solutions that include construction inspection, environmental studies and permitting, site development, and transportation planning. Their expertise extends to managing environmental compliance and conducting thorough assessments for various projects, which positions them as a key player in the environmental engineering sector. The firm has received several accolades for its work, including awards from the American Council of Engineering Companies (ACEC) and recognition from the Illinois Department of Transportation (IDOT). This demonstrates their commitment to quality and innovation in engineering practices.

Environmental Engineering Insights: Key Companies in Illinois

Company	Headquarter	Size	Founded	Ownership
Imeg	Rock Island, Illinois, United States (USA)	1001-5000	1955	Private
V3 Companies	Woodridge, Illinois, United States (USA)	201-500	1983	Private
Baxter & Woodman	Crystal Lake, Illinois, United States (USA)	201-500	1946	Private
Weaver Consultants Group	Chicago, Illinois, United States (USA)	201-500	1991	Private
Christopher B. Burke Engineering, Ltd.	Rosemont, Illinois, United States (USA)	201-500	1986	Private
Jacob & Hefner Associates, Inc.	Downers Grove, Illinois, United States (USA)	51-200	1996	Private
Hanson Professional Services Inc.	Springfield, Illinois, United States (USA)	501-1000	1954	Corporate
Lochner	Chicago, Illinois, United States (USA)	1001-5000	1944	Private
BBJ Group	Chicago, Illinois, United States (USA)	51-200	1997	Private
WBK Engineering	St. Charles, Illinois, United States (USA)	11-50	1998	Private
Manhard Consulting	Lincolnshire, Illinois, United States (USA)	201-500	1972	Private
Clark Dietz, Inc.	Champaign, Illinois, United States (USA)	51-200	1953	Private
Environmental Design International inc.	Chicago, Illinois, United States (USA)	51-200	1991	Private
TERRA Engineering, Ltd.	Chicago, Illinois, United States (USA)	51-200	1992	Corporate
2IM Group, LLC	Chicago, Illinois, United States (USA)	51-200	2005	Private
WRD Environmental	Chicago, Illinois, United States (USA)	11-50	1997	Private
GSG Consultants, Inc.	Schaumburg, Illinois, United States (USA)	51-200	1992	Private
Crawford, Murphy & Tilly	Springfield, Illinois, United States (USA)	201-500	1946	Private
Andrews Engineering, Inc.	Springfield, Illinois, United States (USA)	51-200	1974	Private
Fehr Graham Engineering & Environmental	Freeport, Illinois, United States (USA)	51-200	1973	Family Owned
Quigg Engineering Inc.	Springfield, Illinois, United States (USA)	51-200	2006	Private

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