- Bank of Montreal
- Canadian Scale
- CBM / St Mary's Cement
- Demand Maintenance
- DRP Services Board
- DRPA
- Durham Region Heavy Contractor's Association
- Fraser Ford
- G.C. Refuelling Inc.
- Machinex
- McAsphalt Industries
- NCI
- OPG
- Oshawa Harbour Commission
- R.J. Burnside & Associates
- Royal Bank
- Scotiabank
- TD Canada Trust
- TELUS
- The Miller Group
- Toshiba Business Solutions
- Totten Sims Hubicki Associates
- United Rental
- Veridian
- Vicdom Sand & Gravel
- Waterford Building Maintenance
- Wee Tartan Shop
- Wheelwright Group
- Winslow's Gerolamy
- WMI
