- 3S Incorporated
- A & C Electric
- ABCO Construction
- Addison Park District
- Advance Transformer
- Advanced Technologies
- Aerico
- Aericom Systems, Inc.
- Air Canada
- Aires Consulting
- Angus Chemical
- ARCO/Murray National
- Arlington Heights Park District
- Arrowstream
Construction Company, Inc.
- Baxter Credit Union
- Berlin Industries
- Beth Tikvah
- Bond Corp.
- British Airways
- Brook Furniture
- Bard
- CBRE
- CDW
- CenterPoint Properties
- Centimark Corporation
- Classified Ventures
- Colliers Bennet & Khanweiler
- Collins Electrical Construction
- Comcast Cable Company
- Computer Associates International
- Cornerstone Architects
- Covisint
- Crane Construction
- Creative Property Management
- Creform Logis-Tech Coporation
- Custom Electrical Systems
- Daktronics
- DOW Chemical
- DSW Shoes
- Duke Realty
- Elgin Dairy Foods
- Elmhurst Park District
- Engineering Plus
- Equinix
- Expeditors International
- Express Packaging
- Factory Card Outlet
- FCL Builders
- FE Moran
- First United Methodist Church
- Five Star
- Forsythe Technology
- Friendly Ford
- Fuddruckers
- Georgia Nut Company
- GHC Mechanical
- Glenview Park District
- Google
- Granger Contracting
- HARVARD Collections
- Henry Pratt Company
- Hessler Green Chemical
- Home Depot
- Illinois American Water
- Illinois Institute of Technology |
- Industrial Pipe and Supply
- Interiors for Business
- International Produce Market
- Iron Mountain Data Protection
- Jones Lang LaSalle
- Kaplan Dearborn
- Keeley Construction
- Keeper Corp.
- Kerry Ingredients
- KSA
- Lankford Construction
- Latisys
- Luby's Corp
- Marc Realty
- Mars Equities
- Master Technology Group
- Mayer Brown
- Mechanical Servants
- Medtronics
- New Vision Technologies
- Newell Rubbermaid
- Nexus Distribution
- Norfolk Southern
- Northwest Meats
- Nova Corp
- OCC
- Orbitz
- Patten Power Systems
- Phoenix Fire Protection
- Pier 1 Imports
- Plainfield Public Works
- PNC Financial
- Presbyterian Homes
- Queen of the Rosary
- QuestMark
- Rangar Benson
- Robert Borg Construction
- Rollex
- Roseland Community Hospital
- Royal Die & Stamping
- Ryan Companies
- Saint Gobain Abrasives
- Safety Systems
- Sanford Corp
- Savvis
- Sigma Environmental
- Sign A Rama
- Skanska USA Building
- S-Mechanical
- Solar Communications
- Square D
- St. Michaels Church
- Stillwell Hansen
- Supreme Lobster
- Sushi Samba
- Target Stores
- Technical Concepts
- TEL-NET Solutions
- Toko America
- Tradesmith
- True Value
- Universal Lighting
- URS Corp.
- Valenti Builders
- Valley Fire Protection
- Vanee Foods
- Vanguard
- Victor Construction
- Weiman Products, LLC
- Wheaton College
- Wilton Corporation
- WT Engineering |
