- A-1 Bulkheading Inc
- American Pile Driving Equip
- ATS Drilling Inc
- Berkel & Co Contractors Inc
- Carlson Contruction Inc
- Coastal Pile Driving Inc
- D & D Marine
- Dan W Clark Inc
- Dewitt Construction Inc
- Dewitt Construction Inc
- Drive-Con Inc
- Eastern Marine Construction
- Ford Pile Foundations Inc
- Foundation & Construction Inc
- Garbarino Construction Inc
- Geopier Foundation Co Nw
- Holloway Builders
- Hub Foundation Co
- Johnston Pile Driving
- Kelley Brothers Inc
- L & W Lafour & Sons Constr
- Lobo Inc
- Pile Drivers Local Union 34
- Players Construction
- Ranger Construction
- Wisconsin Caisson & Piling Inc