- Chicago Freight Systems
 - Chicago - Trucking and warehouse company providing distribution, consolidation, cartage, and more. - G & F Manufacturing Company, Inc.
- Oak Lawn - Maker of stainless steel tanks.
- George O'Day's Shop, Inc.
- Chicago - CRT cabinet and locker reconditioner.
- Jarke Corporation
- Niles - Cantilever, modular and boltless structural pallet racks, stacking frames and accessories, drum storage racks available in standard and made-to-order configurations.
- Knaack Manufacturing
- Crystal Lake - Secure, theft resisant tool and material storage equipment.
- REB Steel Material Handling and Record Storage Systems
- Chicago - Specialises in the design, manufacture, distribution and installation of material handling and record filing systems nationwide.
- Warehousing Education and Research Council
- Oak Brook
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