Environmental engineering companies in Illinois are playing a crucial role in tackling today's increasingly urgent environmental challenges. These firms offer a broad range of services, including software, data, consulting services, waste recovery operations, and wastewater treatments. These companies centralize on improving the current methods with innovative environmental technologies, while also focusing on sustainability. In the foreseeable future, we expect these companies to continue paving the path towards a more sustainable planet, by integrating new technologies and methodologies within their existing platforms.


Top 21 environmental engineering companies in Illinois

1. Sphera

  • Website: sphera.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 1999
  • Headcount: 501-1000
  • Latest funding type: Acquired
  • LinkedIn

Sphera is a leading provider of Environmental, Social and Governance (ESG) performance and risk management software, data, and consulting services. They specialize in Environment, Health, Safety & Sustainability (EHS&S) solutions, Operational Risk Management (ORM), Product Stewardship, and Supply Chain Risk Management (SCRM). Their comprehensive platform helps companies mitigate risks, meet compliance obligations, and improve sustainability performance.


2. Veolia Water Technologies - North America

Veolia Water Technologies is a global company offering innovative wastewater and sludge treatment technologies. They help preserve water resources while maximizing energy production and recovering valuable by-products. Their solutions enable the extraction of raw materials and meet the circular economy goals. With a presence in multiple countries, they provide optimization services for water plants worldwide.


3. Heritage-Crystal Clean LLC

  • Website: crystal-clean.com
  • Headquarters: Hoffman Estates, Illinois, United States
  • Founded: 1999
  • Headcount: 1001-5000
  • Latest funding type: Ipo
  • LinkedIn

Crystal Clean is an environmental services company that specializes in sustainable waste recovery operations. They offer innovative solutions for waste disposal, recycling, and reuse using modern technology. Their services include non-hazardous waste stabilization, used oil collection, wastewater treatment, and PFAS remediation.


4. Greeley and Hansen

  • Website: greeley-hansen.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 1914
  • Headcount: 201-500
  • Latest funding type: Acquired
  • LinkedIn

Greeley and Hansen is an environmental engineering company that specializes in providing sustainable solutions for water and wastewater management. They offer engineering, consulting, and design services for various projects.


5. Fehr Graham Engineering & Environmental

Fehr Graham is a top environmental engineering services and consulting firm. They provide solutions in wastewater engineering, water engineering, municipal engineering, transportation engineering, structural engineering, landscape architecture, land development, and more.


6. WRD Environmental

WRD Environmental is a company focused on green infrastructure, stormwater management, and environmental education through sustainable design. They provide civil engineering services and expertise in sustainable practices.


7. Ideal Environmental Engineering Inc.

Ideal Environmental Engineering is a trusted environmental consultant that specializes in handling risks associated with asbestos, lead, mold, and more. They offer a variety of services including inspections, consulting, and engineering services. With a team of licensed professionals, they ensure regulatory compliance and the safety of their clients. Located in Bloomington, Illinois, Ideal Environmental Engineering is dedicated to providing high-quality solutions for all environmental needs.


8. Recycling Consultants

Recycling Consultants is a company that provides expert advice and guidance on efficient and sustainable recycling practices. They offer consulting services to businesses and organizations looking to improve their waste management and recycling processes. With their in-depth knowledge and experience in the industry, they help clients optimize their recycling operations and reduce environmental impact.


9. Ecogardens

Ecogardens is a company that specializes in green roofs and sustainable landscaping. They offer services such as smart irrigation and stormwater management to maximize the benefits of green infrastructure. With a focus on employee wellness and productivity, they also provide office space redesigns that prioritize health and sustainability.


10. GaiaTech Holdings

  • Website: gaiatech.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 1993
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

GaiaTech joined the RPS Group in 2014, offering environmental, engineering, and consulting services to regional and international clients, helping them improve their environmental impact, reduce liabilities, protect people and assets, and bottom-line gains.


11. Storm Water Solutions

Estormwater.com provides stormwater management services and solutions to help mitigate flooding, erosion, and water pollution.


12. Besi Usa

  • Website: besiusa.com
  • Headquarters: University Park, Illinois, United States
  • Founded: 2007
  • Headcount: 11-50
  • LinkedIn

BESI is a sustainability consultancy that provides solutions and practical development for waste, water, and energy. They offer applied research, engineering and development, sustainability consultation, commercial development support, prototype delivery, and active climate tech programs.


13. WRF Engineers

  • Website: wrfeng.com
  • Headquarters: Edwardsville, Illinois, United States
  • Headcount: 11-50

WRF Engineers LLC is a female owned engineering company that specializes in custom electrical, mechanical, and plumbing engineering projects. They offer complete engineering solutions from preliminary studies, conceptual design concepts, cost estimating, preparation of detailed drawings and specifications and construction phase services. Their engineers are LEED accredited focusing on creating buildings that responsibly utilize land, materials, energy and water during their construction and operate efficiently throughout their entire life cycle.


14. Alfred Benesch & Company

  • Website: benesch.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 1946
  • Headcount: 501-1000
  • LinkedIn

Benesch is a professional services firm that has been shaping the infrastructure and local communities of the United States for decades. With expertise in aviation, bridges, built environment, environmental, municipal, parks & recreation, public finance, railroad, roadway, transit, and water, they are dedicated to providing responsive service and delivering project success.


15. Hanson Professional Services Inc.

  • Website: hanson-inc.com
  • Headquarters: Springfield, Illinois, United States
  • Founded: 1954
  • Headcount: 501-1000
  • LinkedIn

Hanson Professional Services Inc. is an engineering, planning, and allied services company that provides a range of construction and project delivery solutions. They are thought leaders in the industry and offer services in engineering, commissioning, energy planning, land acquisition, environmental consulting, and more.


16. Sumac

  • Website: sumacinc.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2002
  • Headcount: 11-50
  • LinkedIn

Sumac Inc offers services in architecture, engineering, construction management, and owner's representation. They specialize in sustainable and energy-efficient solutions for various sectors including aviation, commercial, retail, corporate offices, data centers, education, healthcare, and residential. Sumac Inc is committed to diversity and sustainability.


17. Hospital 2020

Hospital2020.org is an innovative company that aims to revolutionize hospital care and create a safe and green hospital of the future.


18. Environmental Design International inc.

Environmental Design International (EDI) is a progressive firm specializing in project solutions for infrastructure projects. With 32 years of experience, EDI offers excellence, dedication, and innovation in civil engineering, construction inspection, environmental consulting, and surveying. They provide services to various clients in the public and private sectors, including government agencies and healthcare organizations.


19. Consulting Solutions Inc. (CSI)

Consulting Solutions Inc. is a nationwide company specializing in property condition assessments and due diligence services. With a dedicated team of experts, we offer comprehensive assessments for multifamily properties and all property types. We have decades of experience in the field, providing sound recommendations based on our extensive knowledge.


20. Gary R. Weber Associates, INC.

  • Website: grwainc.com
  • Headquarters: Wheaton, Illinois, United States
  • Founded: 1982
  • Headcount: 11-50
  • LinkedIn

GRWA is an ecological consulting and land planning firm specializing in landscape architecture. We offer a range of services to assist clients with their land development projects. With a focus on sustainability and environmental impact, we provide expert guidance for creating beautiful and functional spaces.


21. The Gaia Movement USA

Gaia Movement USA is an environmental organization that focuses on promoting sustainable living by offering recycling solutions and teaching sustainable farming methods. They also work towards combating climate change by promoting the use of renewable energy, halting deforestation, and reducing greenhouse gas emissions.


Want to find more environmental engineering companies?


If you want to find more companies that offer impactful sustainability strategies and innovative environmental solutions you can do so with Inven. This list was built with Inven and there are hundreds of companies like these globally.


With Inven you'll also get to know the company's:


  • Ownership: Which of these are private equity backed? Which are family-owned?
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...and a lot more!