| The Great Lakes Construction Company | | Cincinnati | OH | | Key Contacts | Active Projects | |
| Workman Industrial Services | | Kent | OH | | Key Contacts | Active Projects |  .com |
| Rovi Sys. Co. | | Aurora | OH | | Key Contacts | Active Projects | |
| KDK Pacific Coast Enterprises LLC | | Ravenna | OH | | Key Contacts | Active Projects | |
| Majors Supply & Ground Maintenance | | Monroe | OH | | Key Contacts | Active Projects | |
| Doll Layman Ltd. | | Tipp City | OH | Contractor | Key Contacts | Active Projects | |
| Jacobs | | Columbus | OH | Engineer | Key Contacts | Active Projects | .com/ |
| IBI Group | | New Lexington | OH | Engineer | Key Contacts | Active Projects |  .com/ |
| Mack Industries | | Valley City | OH | | Key Contacts | Active Projects | .com |
| Mote & Associates Inc. | | Greenville | OH | Engineer | Key Contacts | Active Projects | .com/ |
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.org