- ADP
- Alexian Brothers Medical Center
- Andersen Consulting
- Arthur Andersen & Co
- BabbaCo
- BabyBjörn
- Baxter
- Bebe au Lait
- Bowe Bell + Howell
- Britax
- Chiropractic Centennial Foundation
- CNA Windy City USTA Classic
- CrossCom National
- Dr. Brown’s
- Emergency Fund
- Extendedcare.com
- Homeless Prevention Call Center
- Huron Consulting Group
- Husqvarna
- Illinois Municipal Retirement Fund
- Illinois Tool Works
- ITW Buildex
- ITW Ramset/Redhead
- LinksCorp
- MarketMedical.com
- MD Moms
- Medela
- Metlife HMO
- NES Rentals
- Novum Structures
- Paidos Health Management Services
- Premiere Financial Consultants
- ProGolf & Country Club
- ProQuest Company
- Rand McNally
- ShopperTrak
- Simplisse
- Tangent Systems
- TerraPoint
- Texas County & District Retirement System
- The President Riverboat Casino
- The viaLink Company
- Transamerica Finance Company
- Turfgrass Producers International
- U.S. Department of Energy
- United Armored Services
- University of Notre Dame
- Winnetka Congregational Church
- World Sport Chicago
- Youth Guidance
- Zagnoli McEvoy Foley
- ZS Associates