- IDOT
- Norfolk Southern Corporation
- Forest Preserve District Cook County
- Forest Preserve District DuPage County
- Forest Preserve District Kane County
- Forest Preserve District Will County
- Waste Management Landfill
- Standard Parking - Midway Airport
- American Environmental Group
- Inland Realty, LLC
- L&L Hardwoods
- Robert Bruce Company
- Vernon Hills Park District
- Crystal Lake Park District
- Illinois Capital Development Board
- Illinois Department of Natural Resources
- Village of Fox River Grove
- Mount Prospect Park District
- Carol Stream Park District
- City of Henry
- Village of Woodridge
- Village of Bloomingdale
- Naperville Park District
