Health Care
- American Hospital Association
- Abbott Laboratories
- Baxter Travenol
- MacNeal Hospital
- Silvercross Hospital
- Lutheran General Hospital
- University of Chicago Medical Center
- LaRabida Hospital
- Christ Hospital
- Rehabilitation Institute of Chicago
- Northwestern Memorial Hospital
- Lake Forest Hospital
- Hinsdale Hospital
- Elmhurst Hospital
- Children’s Memorial Hospital
- Swedish Covenant Hospital
- Little Company of Mary Hospital
- Bethany Hospital
- Resurrection Hospital
- Baltimore Medical System
- La Grange Hospital
- Michael Reese Hospital
- Veterans Administration Hospital - Milwaukee
- Good Shepherd Hospital
- Alexian Health Center
- Good Samaritan
- Columbus Hospital
- Cook County Hospital
- St. Anthony’s Hospital
- St. Joseph Hospital
Corporate
- CB Richard Ellis
- Chicago Public Schools
- FMC Corporation
- Harris Trust and Savings Bank
- Keebler Company
- Lucent Technologies
- Northern Trust Company
- Parker Pen Company
- Pedersen & Houpt
- Phillips Petroleum
- UGN, Inc.
- Winston & Strawn
- The Ritz Carlton
- Illinois Sports Facilities Authority
- Siemens Corporation
- The City of Philadelphia
- The City of Chicago
- Merchandise Mart
- Ernst and Young
- May and Speh
- Commerce Clearing House
- Chicago Mercantile Exchange
- McCormick Center Hotel
- Merrill Lynch
- Northern Trust
- Gould Corporation
- Bally Manufacturing of America
- Arthur Anderson
- Berger, Newmark and Fenchel
- Centel Corporation