| Business | Phone |
| Alt & Witzig Engineering 208 E Collins Rd, Fort Wayne 46825 | (260) 484-0813 |
| Insite Inc 619 E Dupont Rd, Fort Wayne 46825 | (260) 489-0796 |
| Triad Engineering 1315 Directors Row, Fort Wayne 46808 | (260) 471-3388 |
| Soil Exploration Svc 3807 Transportation Dr, Fort Wayne 46818 | (260) 497-7645 |
| S O Lougheed & Assoc Inc 1017 S Hadley Rd, Fort Wayne 46804 | (260) 432-3665 |