• 3M
• A123 Systems
• Abbott Laboratories
• Abbott Vascular
• AbbVie
• AIG
• Air Products and Chemicals
• Akorn
• Akzo Nobel
• Altran Magnetics
• Alvarez and Marsal
• American Standard Circuits
• Anheuser-Busch InBev
• Aqua-Aerobic Systems
• Archer Daniels Midland (ADM)
• AST Corporation
• ATK
• Austar
• Aux Sable
• Avant
• AveXis
• Axalta Coating Systems
• Bain & Company
• Baker Engineering and Risk Consultants
• Baxter International
• Beam Suntory
• Beckers Group
• Becton Dickinson
• Biogen
• Boeing
• BP
• Brady Corporation
• Bunge Loders Croklaan
• Bunge North America
• Capital One
• CB&I
• Cepheid
• Chevron
• Chicago Trading Company
• CHS
• Citgo Petroleum
• Clarke Solutions
• Clean Air Engineering
• CleanAir Engineering
• Coca-Cola
• Coral Chemical Company
• Cristal Metals
• CSL Behring
• Datalog Geological Services
• Defense Nuclear Facilities Safety Board
• Deutsche Bank
• Diageo
• Dow Chemical Company
• Dow Corning
• DowDuPont
• DRW Holdings
• Dwyer Instruments
• DynaChem
• Ebco
• Ecolab
• Eli Lilly & Co.
• Emerald Cloud Lab
• Emerson Process Management
• EN Engineering
• Enterprise Peak
• Environmental Monitoring and Technologies
• Epic Systems
• Evoleap
• Evonik
• Exelon
• EXL
• ExxonMobil
• ExxonMobil Chemicals Company
• Fabrik Molded Plastics
• Fehr Solutions
• Fiat Chrysler
• Fiat Chrysler Automobiles (FCA)
• Flex-N-Gate
• Flint Hills Resources
• Fresenius Kabi
• Fresenius Kabi USA
• GAF
• Gamma Technologies
• General Electric Healthcare
• General Mills
• Genpact
• Godrej Group
• H-O-H Water Technology
• Heinz
• Hitachi Consulting
• Honeywell
• Honeywell UOP
• Hormel Foods
• HRL Laboratories
• IBM
• Illinois Environmental Protection Agency
• Ingredion
• Intel
• Intertek
• Isotech Laboratories
• James Hardie
• James Hardie Building Products
• John Deere
• Johns Manville
• Jump Trading
• Kerry Group
• Kimberly-Clark
• Kraft Foods
• LabAnswer
• Lakeshore Academy
• Lam Research Corporation
• Layne
• LG Chem
• Lonza
• LyondellBasell
• Manteno Community Unit School District #5, Manteno High School
• Marathon Petroleum Company
• Marquette Partners
• Mars Wrigley
• Materials Data Management
• Maverick Technologies
• Mayo Clinic
• McCain Foods
• Meridian Industries
• Middough
• Mu Sigma
• Nalco
• Nalco Champion
• Nalco Water
• National Grid
• Nestle
• Nestlé
• Nestle, Purina Pet Care
• North Shore Gas
• Northrop Grumman
• Novaspect
• Now Foods
• OSIsoft
• People's Gas
• Peoples Gas
• PepsiCo
• Pepsico - Frito-Lay
• PeroxyChem
• Pfizer
• Phillips 66
• PinnacleAIS
• PinnacleART
• Procter & Gamble
• PT. Cemara Agung Textile Company
• Qorvo
• Rockwell Automation
• Rogers Corporation
• S.C. Johnson & Son
• S&C Electric Company
• SABIC
• Sage Environmental Consulting
• Samsung
• Sargent & Lundy
• Sargento
• Schlumberger
• Self-employed
• Serionix
• Shell
• Sherwin-Williams
• Shreejee Jewellers
• Siam Cement Group (SCG)
• SK Innovation
• Systems Research Inc. (SRI)
• Tate & Lyle
• Tesla Motors
• Tetra Pak
• Texas Instruments
• The Clorox Company
• The Kraft Heinz Company
• TransUnion
• Trelleborg Sealing Solutions
• Trinity Consultants
• Tutoring Resources
• U.S. Army Construction Engineering Research Lab
• U.S. Postal Service
• U.S. Steel
• UL
• United Airlines
• United Conveyor Corporation
• United States Steel Corporation
• University of Illinois at Urbana-Champaign
• UOP
• Valdes Engineering Company
• Valspar
• Veeva Systems
• W. R. Grace
• WEC Energy Group
• West LA Wilshire Financial Center
• Whirlpool Corporation
• Wicket Labs
• Wolfram Research
• Wrigley Company