- AECOM
- Bank of Montreal
- Boychyn Excavating Ltd.
- Canadian Scale
- CBM/St Mary’s Cement
- Demand Maintenance & Machining
- DRP Services Board
- Durham Regional Police Service
- Fraser Ford
- G. E. Capital
- Machinex
- Mack
- McAsphalt Industries
- OPG
- Oshawa Harbour Commission
- Petro Canada
- R.J. Burnside & Associates
- TD Bank
- Telus
- The Miller Group
- Toshiba
- United Rentals
- Veridian
- Vicdom Sand & Gravel
- Waste Management
- Waterford Building Maintenance
- Wee Tartan Shop
- Winslow’s Gerolamy
