| Business | Phone |
| Building Design & Engineering 764 Bragg St, Fond Du Lac 54935 | (920) 923-1174 |
| Gremmer & Assoc 93 S Pioneer Rd 300, Fond Du Lac 54935 | (920) 924-5720 |
| Industrial Controls Engineer 451 County Road K, Fond Du Lac 54935 | (920) 929-8944 |
| J E Arthur & Assoc Inc 548 Prairie Rd, Fond Du Lac 54935 | (920) 922-5703 |
| Podolak Consulting 88 Bryn Mawr Cir, Fond Du Lac 54935 | (920) 921-8499 |
| Summit Design W6744 Rogersville Rd, Fond Du Lac 54937 | (920) 979-5452 |
| Value Engineering Llc 490 W Rolling Meadows Dr A, Fond Du Lac 54937 | (920) 926-0826 |