- AECOM
- Bank of Montreal
- Boychyn Excavating Ltd
- CBM I St Mary's Cement
- Coughlan Homes
- DRP Services Board
- DRPA
- Durham Regional Police Service
- Fraser Ford
- G.C. Refuelling Inc.
- G.E. Capital
- Harper Truck Centre
- Machinex
- McAsphalt Industries
- OPG
- Oshawa Harbour Commission
- Petro Canada
- R.J. Burnside & Associates
- Scotia bank
- TD Canada Trust
- TELUS
- The Miller Group
- United Rental
- Veridian
- Vicdom Sand & Gravel
- Viper Metal Fabricators
- Waterford Building Maintenance
- Wee Tartan Shop
- Winslow's Gerolamy
