- Alro Steel, Inc
- Corsair Engineering, Inc.
- First Student, Inc. (Flint)
- First Student Lake, Inc. (Fenton)
- First Student, Inc. (Linden)
- First Student, Inc. (Westwood Heights)
- Flint Rail Services, LLC.
- Flint Special Services
- Lockhart Chemical
- Vocational Independence Program (Bus Divers)
- Vocational Independence Program (WAC’s)
Building Materials and Construction Trades
- Ace Asphalt and Paving, Inc.
- American Aggregates
- Central Concrete Products, Inc.
- Ferguson Block Company
- Grand Blanc Cement Drivers
- Grand Blanc Cement Plant
- Ken’s Redi-Mix
- Michigan Lumber Company
- Modern Concrete
- Superior Materials, LLC ( Handlers)
- Superior Materials, LLC (Redi-Mix Drivers)
- Tri-City Aggregate, Inc.
Brewery and Soft Drink Trades
- Coca-Cola Bottling Company
- Main Beverage Company
- O’Sullivan Distributing Company
- Seven Up/Dr. Pepper/Snapple Company
Bakery and Laundry
- Domestic Linen Supply Laundry, Co.
- Earthgrains Baking Companies, Inc.
- Perfection Associates, LLC (Bakery)
- Perfection Associates, LLC (Thrift Stores)
Solid Waste and Recycling
- Career Alliance, Inc.
- Genesys Convalescent Center
- Genesys Regional Medical Center RNs
- Genesys Regional Medical Center Technical Unit
- Hamilton Community Health Network, Inc.
- Hurley Practice Management Services
- Kith Haven Acquisition, Co.
- McLaren Regional Medical Center Technical Unit